CN202231513U - DC brushless motor - Google Patents
DC brushless motor Download PDFInfo
- Publication number
- CN202231513U CN202231513U CN201120327592XU CN201120327592U CN202231513U CN 202231513 U CN202231513 U CN 202231513U CN 201120327592X U CN201120327592X U CN 201120327592XU CN 201120327592 U CN201120327592 U CN 201120327592U CN 202231513 U CN202231513 U CN 202231513U
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- CN
- China
- Prior art keywords
- permanent magnet
- magnetic pole
- aluminium
- brushless motor
- adjacent
- 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 - Fee Related
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- Brushless Motors (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The utility model relates to a DC brushless motor, particularly to a DC brushless motor having a tangential excitation structure for a permanent magnet. The DC brushless motor comprises a stator, a housing, and a rotor. The rotor comprises a shaft, an aluminium sleeve gasket fixed upon the shaft, a permanent magnet, and a magnetic pole, wherein the aluminium sleeve gasket is provided with at least one projecting tooth and a groove arranged between two adjacent teeth; the magnetic pole, with a sector structure, is provided with a notch at the lower end; the notch of the magnetic pole buckles upon the tooth of the aluminium sleeve gasket to connect with the aluminium sleeve gasket; two ends of the magnetic poles are respectively provided with an aluminium baffle plate; the permanent magnet axially inserts into the position between two adjacent magnetic poles to buckle with the two magnetic poles for connection; and two side surfaces of the permanent magnet are tangent to the external side surfaces of the two adjacent magnetic poles. The DC brushless motor of the utility model adopts a tangential excitation structure for the permanent magnet inside and employs nonuniform air gap, thereby improving the efficiency and cutting the production cost.
Description
Technical field
The utility model relates to a kind of brushless electric machine, and especially a kind of magnet structure is the dc brushless motor of tangential excitation structure.
Background technology
Common motor gas-gap magnetic flux density is lower, needs permanent magnet more, thereby causes cost higher, and what adopt is even air gap, so heat dispersion is lower.
The utility model content
The technical problem that the utility model will solve is: for solving the problem of above-mentioned existence, a kind of dc brushless motor is provided, and high to solve existing motor production cost, the problem that thermal diffusivity is bad.
The utility model solves the technical scheme that its technical problem adopted: a kind of dc brushless motor; Comprise stator, shell and relative stator rotor rotated; Rotor comprises axle, is fixed on aluminium spacer, permanent magnet and magnetic pole on the axle, and the tooth and the groove between adjacent two teeth of at least one protrusion arranged on the aluminium spacer, and magnetic pole is a sector structure; The magnetic pole lower end has notch, and the notch of magnetic pole is buckled on the tooth of aluminium spacer and is connected with the aluminium spacer.
In order to improve the waveform of magnetic flux density, thereby increase work efficiency, reduce temperature rise; Has the gap between magnetic pole outer wall and the stator inner wall; The magnetic pole two ends are pressed with the aluminium baffle plate respectively, and axially inserting between adjacent two magnetic poles fastens with it is connected, and permanent magnet two sides and adjacent two magnetic pole lateral surfaces are tangent.
Permanent magnet is designed to the tangential excitation structure, and yoke has magnet accumulating cap, and air gap flux density is strengthened, and practices thrift permanent magnet material thereby make with the motor of constant power, reduces production costs greatly.Offer circular axis hole in the aluminium spacer, axle is axially fixed in the axis hole of aluminium spacer, and the outside groove interior angle place of aluminium baffle plate is provided with the dynamic balancing clay.
The beneficial effect of the utility model is, permanent magnet adopts the tangential excitation structure and uses non-uniform gap in the dc brushless motor of the utility model, thereby practiced thrift production cost when it is raised the efficiency.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the cutaway view of the utility model.
Fig. 2 is the cutaway view of Fig. 1 rotor.
Fig. 3 is the front view of Fig. 2 rotor.
1. rotors among the figure, 2. stator, 3. shell, 4. aluminium baffle plate, 5. spool, 6. collar, 7. dynamic balancing clay, 8. magnetic pole, 9. aluminium spacer, 10. permanent magnet.
Embodiment
Combine accompanying drawing that the utility model is done further detailed explanation now.These accompanying drawings are the sketch map of simplification, the basic structure of the utility model only is described in a schematic way, so it only show the formation relevant with the utility model.
A kind of dc brushless motor as shown in Figure 1 comprises stator 2, shell 3 and relative stator rotor rotated 1.
Rotor as shown in Figures 2 and 3 comprises axle 5, aluminium spacer 9, permanent magnet 10 and magnetic pole 8; Tooth and the groove between adjacent two teeth that at least one protrusion is arranged on the aluminium spacer 9; Magnetic pole 8 is a sector structure; Magnetic pole 8 lower ends have notch, and the notch of magnetic pole 8 is buckled on the tooth of aluminium spacer 9 and is connected with aluminium spacer 9.In order to improve the waveform of magnetic flux density; Thereby increase work efficiency; Reduce temperature rise, have the gap between magnetic pole 8 outer walls and stator 2 inwalls, magnetic pole 8 two ends are pressed with aluminium baffle plate 4 respectively; Axially inserting between adjacent two magnetic poles 8 fastens with it is connected, and permanent magnet 10 two sides and adjacent two magnetic poles, 8 lateral surfaces are tangent.Permanent magnet 10 is designed to the tangential excitation structure, and yoke has magnet accumulating cap, and air gap flux density is strengthened, and practices thrift permanent magnet material thereby make with the motor of constant power, reduces production costs greatly.Offer circular axis hole in the aluminium spacer 9, axle 5 is axially fixed in the axis hole of aluminium spacer 9, and the outside groove interior angle place of aluminium baffle plate 4 is provided with the dynamic balancing clay.
With above-mentioned desirable embodiment according to the utility model is enlightenment, and through above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this utility model technological thought.The technical scope of this utility model is not limited to the content on the specification, must confirm its technical scope according to the claim scope.
Claims (2)
1. dc brushless motor; Comprise stator (2), shell (3) and relative stator (2) rotor rotated (1); It is characterized in that: described rotor (1) comprises axle (5), is fixed on aluminium spacer (9), permanent magnet (10) and magnetic pole (8) on the axle (5), and the tooth and the groove between adjacent two teeth of at least one protrusion arranged on the described aluminium spacer (9), and described magnetic pole (8) is a sector structure; Magnetic pole (8) lower end has notch; The notch of magnetic pole (8) is buckled on the tooth of aluminium spacer (9) and is connected with aluminium spacer (9), has the gap between magnetic pole (8) outer wall and stator (2) inwall, and magnetic pole (8) two ends are pressed with aluminium baffle plate (4) respectively; Described permanent magnet (10) axially inserts between adjacent two magnetic poles (8) to fasten with it and is connected, and permanent magnet (10) two sides and adjacent two magnetic poles (8) lateral surface are tangent.
2. dc brushless motor according to claim 1 is characterized in that: the outside groove interior angle place of described aluminium baffle plate (4) is provided with dynamic balancing clay (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120327592XU CN202231513U (en) | 2011-09-02 | 2011-09-02 | DC brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120327592XU CN202231513U (en) | 2011-09-02 | 2011-09-02 | DC brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202231513U true CN202231513U (en) | 2012-05-23 |
Family
ID=46082086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120327592XU Expired - Fee Related CN202231513U (en) | 2011-09-02 | 2011-09-02 | DC brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202231513U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647363A (en) * | 2013-12-13 | 2014-03-19 | 天津瑞德科技发展有限公司 | Fabricated rotor rare-earth permanent magnet torque motor |
-
2011
- 2011-09-02 CN CN201120327592XU patent/CN202231513U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647363A (en) * | 2013-12-13 | 2014-03-19 | 天津瑞德科技发展有限公司 | Fabricated rotor rare-earth permanent magnet torque motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20140902 |
|
| EXPY | Termination of patent right or utility model |