CN201813240U - Shell structure of external rotor permanent magnet motor - Google Patents
Shell structure of external rotor permanent magnet motor Download PDFInfo
- Publication number
- CN201813240U CN201813240U CN2010205468424U CN201020546842U CN201813240U CN 201813240 U CN201813240 U CN 201813240U CN 2010205468424 U CN2010205468424 U CN 2010205468424U CN 201020546842 U CN201020546842 U CN 201020546842U CN 201813240 U CN201813240 U CN 201813240U
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- CN
- China
- Prior art keywords
- yoke part
- mounting portion
- permanent magnet
- rotor
- shell structure
- 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.)
- Expired - Lifetime
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model relates to a shell structure of an external rotor permanent magnet motor, comprising a rotor shell with a magnet yoke part and a mounting part. An inner wall of the magnet yoke part is evenly provided with multiple groups of magnetic poles in the radial direction; and the magnet yoke part is connected with the mounting part through a plastic member. The magnet yoke part and the mounting part are formed by integrally stretching the same steel plate and are blanked into two members with separated structures, and the two members are connected through the plastic member to form the rotor shell. The shell can reduce the load impact of a washing machine, which is conveyed to a motor through a transmission shaft, so as to reduce the vibration of the motor and lower the noise. An outward flange and a step are mounted on the magnetic pole mounting part of the magnet yoke part, thereby the radial rigidity of the rotor shell is good and the vibration and noise of the motor are low; besides, the step provides effective axial positioning for the magnetic pole, thereby the consistency of the axial position of a certain amount of magnetic poles is ensured and the performance and noise of the motor are improved. The utility model has the advantages of stable structure, little vibration, low noise and temperature rising and excellent performance.
Description
Technical field
The utility model relates to a kind of external rotor class permanent magnet synchronous motor, particularly a kind of outer-rotor permanent magnet motor shell structure that mainly is applicable to washing machine.
Background technology
Referring to Fig. 1, Fig. 2, use in washing machine external rotor class permanent magnet synchronous motor comprises rotor 11, stator 12, and the gap 13 between stator and rotor, and gap 13 circumferentially should be uniformly, otherwise the noise and vibration of motor will increase.Rotor 11 is installed on the pivoting part power transmission shaft 14 of washing machine, and fastening with nut 15; Stator 12 is fixed on the fixed part of washing machine.After giving the winding energising of stator 12, produce rotating magnetic field, drive rotor 11 rotations, rotor rotated 11 is by power transmission shaft 14, drive washing machine work, rotor 11 comprise rotor casing 16, are fixed on the magnetic pole 17 of the some of rotor casing 16 inner radial surface equably.Magnetic pole 17 should be consistent in rotor casing 16 axial positions, otherwise the noise and vibration of motor will increase.Above-mentioned rotor casing 16 adopts the steel plate drawing and forming, comprise yoke part 16.1 and mounting portion 16.2, yoke part 16.1 structurally is an one with mounting portion 16.2, and 16.2 end faces have the ventilation hole 16.21 of some and the installing hole 16.22 that power transmission shaft 14 is passed in confession in the mounting portion.
Simultaneously, the rotor casing 16 of above-mentioned traditional use in washing machine external rotor class permanent magnet synchronous motor has following four shortcomings:
One, yoke part 16.1 structurally is an one with mounting portion 16.2, and the load impacting during washing machine work is without being directly passed to rotor damply, and the noise and vibration of motor is big;
Two, the radial strength deficiency is yielding, in case be out of shape then gap 13 between stator and rotor with inhomogeneous, motor oscillating and noise are big;
Three, do not have the structure that supplies magnetic pole 17 axial location, lean on equipment or frock to guarantee the consistency of magnetic pole 17 axial locations, unreliable, after the assembling, the axial location consistency of magnetic pole 17 is poor, and the noise and vibration of motor is big;
Four, dispel the heat by the free convection of hot and cold air, heat radiation is slow, the electric machine temperature rise height.
The utility model content
The purpose of this utility model aim to provide a kind of structure firm, operate steadily, low noise, rapid heat dissipation, long outer-rotor permanent magnet motor shell structure of life-span, to overcome weak point of the prior art.
A kind of outer-rotor permanent magnet motor shell structure by this purpose design, comprise the rotor casing that is provided with yoke part and mounting portion, yoke part inwall radial equipartition is provided with many group magnetic poles, and its architectural feature is to connect by working of plastics between yoke part and the mounting portion.
Described yoke part adopts same block plate one drawing and forming with the mounting portion, and after the moulding, stamping-out is the yoke part and the mounting portion of separating on the structure again.
Described yoke part in the form of a ring, the cross section is L-shaped; The top of yoke part is provided with outside flange.Described yoke part inwall is provided with step, and magnetic pole is arranged on the step.The annular uniform some ventilation holes that are provided with in the bottom surface of described yoke part.
Described mounting portion is the boss shape; The mounting portion is arranged on the center of yoke part bottom surface.
Described working of plastics and yoke part and mounting portion integrated injection molding; Working of plastics in the form of a ring, annular slot and outer ring draw-in groove in inner and outer round surface is respectively arranged with, inside and outside annular draw-in groove partly is connected with yoke with the mounting portion respectively.The also radial uniformly extension of the outer round surface of described working of plastics goes out 6～20 blades.
Described rotor casing is fixedlyed connected the formation rotor with many group magnetic poles, the rotor inboard is provided with stator, leaves uniform gap between stator and the magnetic pole.
Described stator is fixedly installed on the fixed part of washing machine in the form of a ring; Washing machine also is provided with the pivoting part of band power transmission shaft, and power transmission shaft passes stator center and is connected with the center fixation of the mounting portion of rotor casing.
The center of described mounting portion is provided with installing hole, and the power transmission shaft lower end is provided with threaded connector, and threaded connector passes installing hole and is connected with nut.
Yoke of the present utility model part adopts same steel plate one drawing and forming with the mounting portion, and stamping-out becomes two parts that structure is separated then, between connect by plastics, constitute the rotor casing.This casing can be decayed washing machine by the load impacting that the transmission axial direction electric machine transmits, and reduces motor oscillating, reduces noise.There is an outside flange and a step magnetic pole installation position in the yoke part, and the radial rigidity of rotor casing is good, and the noise and vibration of motor is low; Simultaneously, this step provides effective axial location for magnetic pole, and the consistency of the axial location of the magnetic pole of assurance some has been improved motor performance and noise.The blade that the radial equally distributed ventilation hole of some is arranged and form in the end face area of yoke part by working of plastics, when machine operation, blade rotates synchronously with rotor, the hot-air that forces motor to produce is accelerated convection current through ventilation hole and cold air on every side, thus in addition the motor internal rapid heat dissipation, electric machine temperature rise is low, performance is excellent.Its structure is firm, vibration is little, noise and temperature rise is low, performance is excellent.
Description of drawings
Fig. 1 is the prior art structural representation.
Fig. 2 is Fig. 1 rotor casing plan structure schematic diagram.
Fig. 3 is the utility model one example structure schematic diagram.
Fig. 4 looks up structural representation for Fig. 3 rotor casing.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
First embodiment
Referring to Fig. 3, Fig. 4, this outer-rotor permanent magnet motor shell structure comprises the rotor casing 6 that is provided with yoke part 6.1 and mounting portion 6.2, and yoke part 6.1 inwall radial equipartitions are provided with many group magnetic poles 7.Yoke part 6.1 adopts same block plate one drawing and forming simultaneously with mounting portion 6.2, and after the moulding, stamping-out is the yoke part 6.1 and the mounting portion 6.2 of separating on the structure again; Last yoke part 6.1, mounting portion 6.2 are injection molded into rotor casing 6 with working of plastics 6.3 one.
Yoke part 6.1 in the form of a ring, the cross section is L-shaped; The top of yoke part 6.1 is provided with outside flange 6.11, and inwall is provided with step 6.12, the annular uniform some ventilation holes 6.13 that are provided with in bottom surface; Magnetic pole 7 is arranged on the step 6.12.Mounting portion 6.2 is the boss shape, and it is arranged on the center of yoke part 6.1 bottom surfaces.Working of plastics 6.3 and yoke part 6.1 and mounting portion 6.2 integrated injection moldings; Working of plastics 6.3 in the form of a ring, annular slot and outer ring draw-in groove in inner and outer round surface is respectively arranged with, inside and outside annular draw-in groove is connected with yoke part 6.1 with mounting portion 6.2 respectively.The also radial uniformly extension of the outer round surface of working of plastics 6.3 goes out 12 blades 6.31.
Second embodiment
Yoke part and mounting portion are adopted the steel plate drawing and forming respectively, connect by working of plastics between the two.Yoke part in the form of a ring, the cross section is L-shaped.The mounting portion is the boss shape.Working of plastics and yoke part and mounting portion integrated injection molding.Other does not state part with first embodiment.
Claims (10)
1. outer-rotor permanent magnet motor shell structure, comprise the rotor casing (6) that is provided with yoke part (6.1) and mounting portion (6.2), yoke part (6.1) inwall radial equipartition is provided with many group magnetic poles (7), it is characterized in that connecting by working of plastics (6.3) between the yoke part (6.1) and mounting portion (6.2).
2. outer-rotor permanent magnet motor shell structure according to claim 1, it is characterized in that described yoke part (6.1) and the same block plate one drawing and forming of mounting portion (6.2) employing, after the moulding, stamping-out is the yoke part (6.1) and mounting portion (6.2) of separating on the structure again.
3. outer-rotor permanent magnet motor shell structure according to claim 1 and 2 is characterized in that described yoke part (6.1) in the form of a ring, and the cross section is L-shaped; The top of yoke part (6.1) is provided with outside flange (6.11), and inwall is provided with step (6.12), and magnetic pole (7) is arranged on the step (6.12).
4. outer-rotor permanent magnet motor shell structure according to claim 3 is characterized in that the partly uniform some ventilation holes (6.13) that are provided with of bottom surface annular of (6.1) of described yoke.
5. outer-rotor permanent magnet motor shell structure according to claim 4 is characterized in that described mounting portion (6.2) is the boss shape; Mounting portion (6.2) is arranged on the center of yoke part (6.1) bottom surface.
6. outer-rotor permanent magnet motor shell structure according to claim 5 is characterized in that described working of plastics (6.3) and yoke part (6.1) and mounting portion (6.2) integrated injection molding; Working of plastics (6.3) in the form of a ring, annular slot and outer ring draw-in groove in inner and outer round surface is respectively arranged with, inside and outside annular draw-in groove respectively with mounting portion (6.2) and yoke partly (6.1) be connected.
7. outer-rotor permanent magnet motor shell structure according to claim 6 is characterized in that the also radial uniformly extension of outer round surface of described working of plastics (6.3) goes out 6～20 blades (6.31).
8. outer-rotor permanent magnet motor shell structure according to claim 7, it is characterized in that described rotor casing (6) fixedlys connected formation rotor (1) with many group magnetic poles (7), rotor (1) inboard is provided with stator (2), leaves uniform gap (3) between stator (2) and the magnetic pole (7).
9. outer-rotor permanent magnet motor shell structure according to claim 8 is characterized in that described stator (2) in the form of a ring, is fixedly installed on the fixed part of washing machine; Washing machine also is provided with the pivoting part of band power transmission shaft (4), and power transmission shaft (4) passes stator (2) center and is connected with the center fixation of the mounting portion (6.2) of rotor casing (6).
10. outer-rotor permanent magnet motor shell structure according to claim 9, the center that it is characterized in that described mounting portion (6.2) is provided with installing hole (6.21), power transmission shaft (4) lower end is provided with threaded connector, and threaded connector passes installing hole and is connected with nut (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205468424U CN201813240U (en) | 2010-09-22 | 2010-09-22 | Shell structure of external rotor permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205468424U CN201813240U (en) | 2010-09-22 | 2010-09-22 | Shell structure of external rotor permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201813240U true CN201813240U (en) | 2011-04-27 |
Family
ID=43896177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205468424U Expired - Lifetime CN201813240U (en) | 2010-09-22 | 2010-09-22 | Shell structure of external rotor permanent magnet motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201813240U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522836A (en) * | 2011-12-30 | 2012-06-27 | 上海日用-友捷汽车电气有限公司 | Outer rotor component of motor |
| CN105545801A (en) * | 2016-01-29 | 2016-05-04 | 泰信电机(苏州)有限公司 | Heat sink of variable frequency motor |
-
2010
- 2010-09-22 CN CN2010205468424U patent/CN201813240U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522836A (en) * | 2011-12-30 | 2012-06-27 | 上海日用-友捷汽车电气有限公司 | Outer rotor component of motor |
| CN105545801A (en) * | 2016-01-29 | 2016-05-04 | 泰信电机(苏州)有限公司 | Heat sink of variable frequency motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110427 |