CN112600329B - Rotor of miniature permanent magnet motor - Google Patents
Rotor of miniature permanent magnet motor Download PDFInfo
- Publication number
- CN112600329B CN112600329B CN202011279397.4A CN202011279397A CN112600329B CN 112600329 B CN112600329 B CN 112600329B CN 202011279397 A CN202011279397 A CN 202011279397A CN 112600329 B CN112600329 B CN 112600329B
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- China
- Prior art keywords
- permanent magnet
- rotor
- fixing
- rotor body
- magnet blocks
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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
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- 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
- H02K1/278—Surface mounted magnets; Inset magnets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a rotor of a miniature permanent magnet motor, which relates to the technical field of motors and comprises a rotor body, wherein a rotating shaft is embedded in the center of the rotor body, permanent magnet blocks are arranged on the inner side of the rotor body, a fixing frame is sleeved on the outer side of the rotor body and used for fixing the permanent magnet blocks, and bearings are sleeved at two ends of the rotating shaft. The permanent magnet motor rotor provided by the invention has the advantages that the structure is reasonable, the mounting and dismounting are convenient, the stability is good, the permanent magnet blocks can be fixed in the rotor iron core through the arranged fixing frame, the stability is improved, the permanent magnet blocks cannot be separated under the high-speed rotation of the motor, meanwhile, the mounting and dismounting can be rapidly realized through the fixing frame, the replacement of the permanent magnet blocks is convenient, the subsequent maintenance and treatment of the rotor are convenient, the defects that the permanent magnet blocks in the existing permanent magnet motor rotor are poor in stability and easy to fall off due to the fact that the permanent magnet blocks are bonded on the rotor yoke are overcome, the service life of the motor rotor is prolonged, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a rotor of a miniature permanent magnet motor.
Background
The permanent magnet brushless DC motor is a DC motor with magnetic field established by one or more permanent magnets, the performance of the permanent magnet brushless DC motor is similar to that of a separately excited DC motor with constant exciting current, and the speed can be conveniently adjusted by changing armature voltage. Compared with other direct current motors, the direct current motor has the advantages of small volume, high efficiency, simple structure, small copper consumption and the like, and is the main type of a low-power direct current motor.
The permanent magnet motor mainly comprises a stator, a rotor, an end cover and the like, wherein the rotor is a rotating body supported by a bearing and mainly comprises a rotor iron core, a permanent magnet and a rotating shaft.
However, in the rotor of the micro permanent magnet motor in the market at present, the permanent magnet is usually adhered to the outer circumference of the rotor yoke by using a high-temperature glue, or the permanent magnet is embedded in the edge of the outer circumference of the rotor yoke, when the torque is increased, the shearing force borne by the rotor is larger, the fatigue resistance of the permanent magnet as a component is reduced, the possibility of damage is increased, the stability of the permanent magnet is not good, the permanent magnet is easy to separate under the high-speed rotation of the motor rotor, and the service life of the motor is reduced. Accordingly, those skilled in the art have provided a rotor for a miniature permanent magnet motor to solve the problems set forth in the background art.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a rotor of a micro permanent magnet motor, in which permanent magnet blocks can be fixed in a rotor core by an arranged fixing frame, so as to increase the stability of the rotor, so that the permanent magnet blocks cannot be separated when the motor rotates at a high speed.
In order to achieve the purpose, the invention provides the following technical scheme: a rotor of a miniature permanent magnet motor comprises a rotor body, wherein a rotating shaft is embedded in the center of the rotor body, permanent magnet blocks are arranged on the inner side of the rotor body, a fixing frame is sleeved on the outer side of the rotor body and used for fixing the permanent magnet blocks, and bearings are sleeved at two ends of the rotating shaft; the fixing frame comprises a bracket, one end of the bracket is provided with a left end cover, and the other end of the bracket is provided with a right end cover; the rotor body comprises a rotor iron core, a plurality of pole shoes which are distributed circumferentially are arranged at the edge of the outer side of the rotor iron core, and an accommodating groove is formed between every two adjacent pole shoes; the accommodating groove consists of a permanent magnet mounting groove and a bracket mounting groove, and the permanent magnet block is arranged in the permanent magnet mounting groove; the bracket comprises a compression plate, a clamping block is arranged on the outer side of the compression plate, and spiral rods are arranged at two ends of the clamping block; the left end cover consists of an outer fixing ring and an inner fixing ring, and a reinforcing rib is arranged between the outer fixing ring and the inner fixing ring; the edge of the outer fixing ring is provided with a plurality of threaded holes which are distributed circumferentially; the inboard of interior solid fixed ring is provided with the fixed subassembly that is the circumference and distributes, fixed subassembly is including embedding installation at the inside dead lever of interior solid fixed ring, the cavity has been seted up between interior solid fixed ring and the dead lever, the inside fixed mounting of cavity has the spring, be provided with the stopper between spring and the dead lever, the fixed orifices has been seted up with the position department that the dead lever corresponds to the surface of pivot.
As a still further scheme of the invention: the right end cover and the left end cover are identical in structure.
As a still further scheme of the invention: and a plurality of lightening holes which are circumferentially distributed are formed in the edge of the inner side of the rotor core.
As a still further scheme of the invention: the inner side wall of the rotor body is provided with a key bar, and the surface of the rotating shaft is provided with a key groove matched with the key bar.
Compared with the prior art, the invention has the beneficial effects that:
1. the permanent magnet blocks can be fixed in the rotor iron core through the arranged fixing frame, the stability of the permanent magnet blocks is improved, the permanent magnet blocks cannot be separated when the motor rotates at high speed, meanwhile, the fixing frame can quickly realize installation and disassembly, the permanent magnet blocks are convenient to replace, the subsequent maintenance and treatment of the rotor are convenient, the defects that the permanent magnet blocks in the existing permanent magnet motor rotor are easy to fall off due to the fact that the permanent magnet blocks are bonded on a rotor yoke are overcome, the service life of the motor rotor is prolonged, the production cost is reduced, when the permanent magnet blocks need to be fixed, the permanent magnet blocks are firstly installed in the permanent magnet installing grooves, then the supports are placed into corresponding accommodating grooves one by one, at the moment, the permanent magnet blocks are pressed by the pressing plates, the clamping blocks are clamped with the support installing grooves, then the left end cover and the right end cover are respectively fixed at two ends of the supports through the screw rods, and simultaneously, the reinforcing ribs abut against the two ends of the permanent magnet blocks tightly, the purpose of fixing the permanent magnet blocks is achieved, and the permanent magnet block fixing device is simple in design structure, convenient to install and disassemble and good in stability.
2. The fixing assembly is arranged, so that the left end cover, the right end cover and the rotating shaft can be fixed, the fixing effect of the fixing frame is increased, the stability of the fixing frame is ensured, in the using process, after the permanent magnet block is fixed by the right end cover and the left end cover, the spring is in a compressed state, the fixing rod enters the cavity, and after the fixing rod reaches the position of the fixing hole, the fixing rod is driven to extend out of the fixing hole under the elastic action of the spring and is inserted into the fixing hole, so that the left end cover, the right end cover and the rotating shaft are fixed.
3. According to the invention, through the arrangement of the key bars and the key grooves, radial looseness between the rotor body and the rotating shaft can be prevented, the stability of the rotor body is improved, the service life of the electronic rotor is prolonged, and the defects that the radial looseness is easy to generate between the traditional motor rotor and the rotating shaft and the service life of the motor is influenced are solved.
Drawings
FIG. 1 is a schematic structural diagram of a rotor of a micro permanent magnet motor;
FIG. 2 is a left side view of a rotor of a miniature permanent magnet motor;
FIG. 3 is a schematic structural diagram of a rotor body in a rotor of a micro permanent magnet motor;
FIG. 4 is a schematic structural diagram of a fixing frame in a rotor of a micro permanent magnet motor;
FIG. 5 is an exploded view of a rotor of a micro permanent magnet motor;
FIG. 6 is a schematic structural diagram of a bracket in a rotor of a micro permanent magnet motor;
FIG. 7 is a schematic structural diagram of a left end cover in a rotor of a micro permanent magnet motor;
FIG. 8 is a schematic cross-sectional view of a left end cover of a rotor of a micro permanent magnet motor;
fig. 9 is a partial enlarged view of a in a rotor of a micro permanent magnet motor;
fig. 10 is a schematic cross-sectional view of a rotor body in a rotor of a micro permanent magnet motor.
In the figure: 10. a rotor body; 11. a rotor core; 12. lightening holes; 13. a pole shoe; 14. accommodating grooves; 141. a permanent magnet mounting groove; 142. a bracket mounting groove; 15. a key bar; 20. a rotating shaft; 21. a fixing hole; 22. a keyway; 30. a fixed mount; 31. a support; 311. a compression plate; 312. a clamping block; 313. a screw rod; 32. a left end cap; 321. an outer fixing ring; 322. an inner fixing ring; 323. reinforcing ribs; 324. a threaded hole; 325. a fixing assembly; 326. a cavity; 327. fixing the rod; 328. a limiting block; 329. a spring; 33. a right end cap; 40. a bearing; 50. permanent magnet blocks.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 10, in an embodiment of the present invention, a rotor of a micro permanent magnet motor includes a rotor body 10, a rotating shaft 20 is embedded in a central position of the rotor body 10, a permanent magnet block 50 is disposed inside the rotor body 10, a fixing frame 30 is sleeved outside the rotor body 10, the fixing frame 30 is used for fixing the permanent magnet block 50, and bearings 40 are respectively sleeved at two ends of the rotating shaft 20; the fixing frame 30 comprises a bracket 31, one end of the bracket 31 is provided with a left end cover 32, and the other end is provided with a right end cover 33.
The rotor body 10 comprises a rotor core 11, a plurality of pole shoes 13 which are circumferentially distributed are arranged at the outer side edge of the rotor core 11, and an accommodating groove 14 is formed between every two adjacent pole shoes 13; the receiving groove 14 is composed of a permanent magnet mounting groove 141 and a bracket mounting groove 142, and the permanent magnet block 50 is disposed in the permanent magnet mounting groove 141.
A plurality of lightening holes 12 distributed circumferentially are arranged at the inner side edge of the rotor core 11.
The holder 31 includes a pressing plate 311, a latch 312 is disposed outside the pressing plate 311, screw rods 313 are disposed at both ends of the latch 312, and the latch 312 is fitted in the holder mounting groove 142.
The left end cover 32 consists of an outer fixing ring 321 and an inner fixing ring 322, and a reinforcing rib 323 is arranged between the outer fixing ring 321 and the inner fixing ring 322; the edge of the outer fixing ring 321 is provided with a plurality of threaded holes 324 distributed circumferentially.
In the specific implementation process: the permanent magnet blocks 50 can be fixed in the rotor core 11 through the arranged fixing frame 30, the stability of the permanent magnet blocks is improved, the permanent magnet blocks 50 cannot be separated when the motor rotates at a high speed, meanwhile, the fixing frame 30 can be quickly installed and disassembled, the permanent magnet blocks 50 are convenient to replace, the subsequent maintenance and treatment of the rotor are convenient, the defects that the permanent magnet blocks 50 in the existing permanent magnet motor rotor are poor in stability and easy to fall off due to being bonded on a rotor yoke are overcome, the service life of the motor rotor is prolonged, the production cost is reduced, when the permanent magnet blocks 50 need to be fixed, the permanent magnet blocks 50 are firstly installed in the permanent magnet installation grooves 141, then the supports 31 are placed into the corresponding accommodating grooves 14 in sequence, at the moment, the compression plates 311 compress the permanent magnet blocks 50, the fixture blocks 312 are clamped with the support installation grooves 142, and then the left end cover 32 and the right end cover 33 are respectively fixed at two ends of the supports 31 through the spiral rods 313, meanwhile, the reinforcing ribs 323 tightly abut against two ends of the permanent magnet block 50 to achieve the purpose of fixing the permanent magnet block 50.
The inner side of the inner fixing ring 322 is provided with fixing assemblies 325 distributed circumferentially.
The fixing assembly 325 includes a fixing rod 327 embedded in the inner fixing ring 322, a cavity 326 is formed between the inner fixing ring 322 and the fixing rod 327, a spring 329 is fixedly installed in the cavity 326, and a limit block 328 is arranged between the spring 329 and the fixing rod 327.
The surface of the rotating shaft 20 is provided with a fixing hole 21 at a position corresponding to the fixing rod 327.
The right end cap 33 is identical in structure to the left end cap 32.
In the specific implementation process: can realize the fixed of left end lid 32 and right-hand member lid 33 and pivot 20 through the fixed subassembly 325 that sets up, increase the fixed effect of mount 30, guarantee its stability, in the use, after right-hand member lid 33 fixed permanent magnet block 50 with left end lid 32, spring 329 is in compression state, dead lever 327 gets into in the cavity 326, after dead lever 327 reachs the position of fixed orifices 21, in the elastic action of spring 329 drives dead lever 327 again and stretches out and insert fixed orifices 21, realize left end lid 32, right-hand member lid 33 and pivot 20 fixed.
The inner side wall of the rotor body 10 is provided with a key bar 15, and the surface of the rotating shaft 20 is provided with a key slot 22 matched with the key bar 15.
In the specific implementation process: the key strip 15 and the key groove 22 can prevent radial looseness from occurring between the rotor body 10 and the rotating shaft 20, the stability of the rotor is improved, the service life of the electronic rotor is prolonged, and the defects that radial looseness is easy to occur between the traditional motor rotor and the rotating shaft 20 and the service life of the motor is influenced are overcome.
The working principle of the invention is as follows: in the practical use process, the permanent magnet blocks 50 can be fixed in the rotor core 11 through the arranged fixing frame 30, the stability of the permanent magnet blocks is improved, the permanent magnet blocks 50 cannot be separated when the motor rotates at a high speed, meanwhile, the fixing frame 30 can be quickly installed and disassembled, the permanent magnet blocks 50 can be conveniently replaced, the subsequent maintenance and treatment of the rotor are facilitated, the service life of the motor rotor is prolonged, the production cost is reduced, when the permanent magnet blocks 50 need to be fixed, the permanent magnet blocks 50 are firstly installed in the permanent magnet installation grooves 141, then the supports 31 are placed in the corresponding accommodating grooves 14 in a close-to-close manner, at the moment, the permanent magnet blocks 50 are tightly pressed by the pressing plates 311, the clamping blocks 312 are clamped with the support installation grooves 142, then the left end covers 32 and the right end covers 33 are respectively fixed at the two ends of the supports 31 through the screw rods 313, meanwhile, the reinforcing ribs 323 tightly press against the two ends of the permanent magnet blocks 50, and the purpose of fixing the permanent magnet blocks 50 is achieved, this design simple structure, the installation is dismantled conveniently, and the steadiness is better, it is further, after right-hand member lid 33 and left end lid 32 fix permanent magnet block 50, spring 329 is in compression state, dead lever 327 gets into in cavity 326, after dead lever 327 reachs the position of fixed orifices 21, spring 329's elastic action drives dead lever 327 again and stretches out and insert in the fixed orifices 21, realize left end lid 32, the fixed of right end lid 33 and pivot 20, can realize the fixed of left end lid 32 and right end lid 33 and pivot 20 through the fixed subassembly 325 that sets up, increase the fixed effect of mount 30, guarantee its stability, it is further again, can prevent through the keybar 15 and the keyway 22 that set up that to produce radially not hard up between rotor body 10 and the pivot 20, increase its stability, the life of extension electron rotor.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. A rotor of miniature permanent-magnet machine, includes rotor body (10), its characterized in that: a rotating shaft (20) is embedded in the center of the rotor body (10), permanent magnet blocks (50) are arranged on the inner side of the rotor body (10), a fixing frame (30) is sleeved on the outer side of the rotor body (10), the fixing frame (30) is used for fixing the permanent magnet blocks (50), and bearings (40) are sleeved at two ends of the rotating shaft (20);
the fixing frame (30) comprises a bracket (31), one end of the bracket (31) is provided with a left end cover (32), and the other end of the bracket (31) is provided with a right end cover (33);
the rotor body (10) comprises a rotor iron core (11), a plurality of pole shoes (13) which are distributed circumferentially are arranged at the outer side edge of the rotor iron core (11), and an accommodating groove (14) is formed between every two adjacent pole shoes (13);
the accommodating groove (14) consists of a permanent magnet mounting groove (141) and a bracket mounting groove (142), and the permanent magnet block (50) is arranged in the permanent magnet mounting groove (141);
the bracket (31) comprises a compression plate (311), a clamping block (312) is arranged on the outer side of the compression plate (311), and screw rods (313) are arranged at two ends of the clamping block (312);
the left end cover (32) consists of an outer fixing ring (321) and an inner fixing ring (322), and a reinforcing rib (323) is arranged between the outer fixing ring (321) and the inner fixing ring (322); the edge of the outer fixing ring (321) is provided with a plurality of threaded holes (324) which are distributed circumferentially;
the inner side of the inner fixing ring (322) is provided with fixing components (325) which are distributed in a circumferential manner;
the fixing assembly (325) comprises a fixing rod (327) embedded and mounted in the inner fixing ring (322), a cavity (326) is formed between the inner fixing ring (322) and the fixing rod (327), a spring (329) is fixedly mounted in the cavity (326), and a limiting block (328) is arranged between the spring (329) and the fixing rod (327);
the surface of the rotating shaft (20) is provided with a fixing hole (21) at a position corresponding to the fixing rod (327).
2. The rotor of a miniature permanent magnet electric machine of claim 1, wherein: the right end cover (33) and the left end cover (32) are identical in structure.
3. The rotor of a miniature permanent magnet electric machine of claim 1, wherein: and a plurality of lightening holes (12) which are circumferentially distributed are formed in the edge of the inner side of the rotor iron core (11).
4. The rotor of a miniature permanent magnet electric machine of claim 1, wherein: the inner side wall of the rotor body (10) is provided with a key bar (15), and the surface of the rotating shaft (20) is provided with a key groove (22) matched with the key bar (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011279397.4A CN112600329B (en) | 2020-11-16 | 2020-11-16 | Rotor of miniature permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011279397.4A CN112600329B (en) | 2020-11-16 | 2020-11-16 | Rotor of miniature permanent magnet motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112600329A CN112600329A (en) | 2021-04-02 |
| CN112600329B true CN112600329B (en) | 2022-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011279397.4A Active CN112600329B (en) | 2020-11-16 | 2020-11-16 | Rotor of miniature permanent magnet motor |
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| Country | Link |
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| CN (1) | CN112600329B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114696498B (en) * | 2022-04-11 | 2023-06-02 | 江苏沃尔森电子科技有限公司 | Brushless motor rotor structure and brushless motor |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6135967B2 (en) * | 2012-08-07 | 2017-05-31 | 日本電産株式会社 | Rotor, motor, and method of manufacturing rotor |
| KR102073005B1 (en) * | 2013-07-17 | 2020-02-04 | 삼성전자주식회사 | Motor |
| KR101611519B1 (en) * | 2015-10-05 | 2016-04-11 | 파이옴 모터 주식회사 | Rotor for permanent magnet type and manufacturing method of the same |
| KR20170138105A (en) * | 2016-06-07 | 2017-12-15 | 뉴모텍(주) | Spoke type rotor |
| CN207053272U (en) * | 2017-07-27 | 2018-02-27 | 山西华鑫电气有限公司 | Three-phase permanent-magnetic synchronous motors surface-mounted rotor structure |
| CN107968504A (en) * | 2017-12-29 | 2018-04-27 | 天津创远亿德科技发展有限公司 | A kind of permanent magnet synchronous motor |
| CN110739787B (en) * | 2018-07-20 | 2022-04-12 | 广东德昌电机有限公司 | Motor and rotor thereof |
| CN211481021U (en) * | 2020-03-07 | 2020-09-11 | 肇庆市鲲鹏动力有限公司 | Permanent magnet mounting structure of permanent magnet synchronous motor |
| CN111525718A (en) * | 2020-06-02 | 2020-08-11 | 华育昌(肇庆)智能科技研究有限公司 | Signal intelligent control rare earth permanent magnet synchronous motor rotor |
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| CN112600329A (en) | 2021-04-02 |
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