CN2640110Y - Rotor assembly of flat brushless D.C. motor - Google Patents
Rotor assembly of flat brushless D.C. motor Download PDFInfo
- Publication number
- CN2640110Y CN2640110Y CN 03260831 CN03260831U CN2640110Y CN 2640110 Y CN2640110 Y CN 2640110Y CN 03260831 CN03260831 CN 03260831 CN 03260831 U CN03260831 U CN 03260831U CN 2640110 Y CN2640110 Y CN 2640110Y
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- CN
- China
- Prior art keywords
- magnet ring
- rotor assembly
- flat brushless
- utility
- model
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- Expired - Lifetime
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The utility model provides a rotor assembly of flat brushless D. C. motor, comprising a magnet ring, an eccentric block and plastic inserts fixed in the magnet ring, and a bearing which is fixed on the plastic inserts and is coaxial with the magnet ring. The magnet ring is provided with a plurality of pairs of N, S magnetic poles along the circumference orderly. The eccentric block and the plastic inserts are respectively two column bodies with a kidney-shaped cross section and a fan-shaped cross section. The utility model overcomes the defects of poor bonding strength, difficult assembly, low bonding efficiency and poor impact resistance of the original rotor assembly. The utility model has stronger performance of shock resistance and overcomes the defects that the contraction ratio of the size of the inner hole is bigger; precision is difficult to control and bearings are difficult to fit with each other when sintering by making use of eccentric wheels. Under the condition of the same eccentric mass, the utility model also reduces the weight of the eccentric block, saves noble metal such as tungsten alloy and reduces cost.
Description
Technical field
The utility model relates to the torque motor parts, particularly the rotor assembly of flat brushless DC motor.
Background technology
Flat brushless DC motor is generally used for cell phone, PDA, PC packets of information and other small-sized devices of movably pointing out incoming call or information with pulse signal under quiet occasion.Existing flat brushless DC motor rotor adopts and the bonding eccentric wheel structure of magnet ring.In the scheme that is called " flat brushless DC motor rotor arrangement " (application number is 03251040.3) of the utility model (on May 20th, 2003) application in advance, though strengthened eccentric mass, the vibration force that has increased rotor is (referring to Fig. 4, wherein 1 is magnet ring, and 2 is eccentric wheel, and 3 is bearing), but because magnet ring is thinner, only depend on outer semicircle of eccentric wheel and the interior circle of magnet ring bonding, bonding intensity is low, can not bear bigger impulsive force in bonding end.In addition, eccentric wheel also difficulty relatively of the cooperation of the difficult control of hole dimension and bearing in it when sintering.
The utility model content
The purpose of this utility model is to overcome drawbacks such as original rotor assembly adhesive strength is low, adopts eccentric block to replace original eccentric wheel structure, provides a kind of and is convenient to install, the flat brushless DC motor rotor arrangement of lower cost.
For achieving the above object, the rotor assembly of a kind of flat brushless DC motor of the utility model comprises magnet ring, is fixed in eccentric block, the plastics inserts in the magnet ring and is fixed on bearing on the plastics inserts that bearing and magnet ring are positioned on the same axis.Magnet ring is filled with many to N, S magnetic pole along circumferential order, eccentric block and plastics inserts are respectively cross section and are kidney shape and fan-shaped column.
A kind of flat brushless DC motor rotor assembly that the utility model provides, its middle (center) bearing is injection-moulded on the fan-shaped column of plastics inserts.
A kind of flat brushless DC motor rotor assembly that the utility model provides, wherein eccentric block is solidificated in the magnet ring with epoxy glue with the plastics inserts that has bearing.
A kind of flat brushless DC motor rotor assembly that the utility model provides, the N of its middle magnetic ring, S magnetic pole are 3 to 6 pairs.
A kind of flat brushless DC motor rotor assembly that the utility model provides, the N of its middle magnetic ring, S magnetic pole are 4 pairs.
A kind of flat brushless DC motor rotor assembly that the utility model provides, its middle (center) bearing is an oiliness bearing.
A kind of flat brushless DC motor rotor assembly that the utility model provides, wherein eccentric block is made with tungsten alloy.
The effect that the utility model is useful is to have overcome the low drawback of original rotor assembly adhesive strength, owing to adopt eccentric block and plastics inserts to replace original eccentric wheel structure, adopts epoxy glue to solidify, and therefore, has stronger impact resistance.Simultaneously, also overcome original rotor assembly adhesive strength low, be difficult for drawbacks such as assembling, bonding work efficiency are low, impact resistance difference, have stronger impact resistance, overcome use eccentric wheel when sintering its endoporus dimensional contraction than greatly, more difficult control precision, while and bearing cooperate difficult defective.Under identical eccentric mass situation, also reduced the weight of eccentric block, saved precious metals such as tungsten alloy, reduced cost.
Description of drawings
Describe below in conjunction with accompanying drawing.
Fig. 1 is the structure chart of the rotor assembly of flat brushless DC motor;
Fig. 2 is the end view of the rotor assembly of flat brushless DC motor;
Fig. 3 is the schematic diagram of magnet ring;
Fig. 4 is the structure chart of existing flat brushless DC motor rotor assembly.
Embodiment
Below in conjunction with embodiment a kind of flat brushless DC motor rotor assembly that the utility model provides is elaborated.
See figures.1.and.2, the rotor assembly of flat brushless DC motor comprises magnet ring 1, be fixed in eccentric block 2, the plastics inserts 3 in the magnet ring 1 and be fixed on bearing 4 on the plastics inserts 3, and bearing 4 is positioned on the same axis with magnet ring 1.Magnet ring 1 is filled with many to N, S magnetic pole along circumferential order, eccentric block 2 and plastics inserts 3 are respectively cross section and are kidney shape and fan-shaped column.
With reference to Fig. 3, magnet ring 1 is filled with 4 couples of N, S magnetic pole along circumferential order.Flat brushless DC motor stator module coil produces magnetic field and produces active force by pole pair magnet ring 1, produces a plurality of turning moments thus.Bearing 4 play supporting role, and rotor assembly rotates around the bolster in the stator apparatus, produces vibration force thus.
From such scheme as can be seen, the beneficial effects of the utility model be overcome original rotor assembly adhesive strength low, be difficult for drawbacks such as assembling, bonding work efficiency are low, impact resistance difference, have stronger impact resistance, overcome use eccentric wheel when sintering its endoporus dimensional contraction than greatly, more difficult control precision, while and bearing cooperate difficult defective.Under identical eccentric mass situation, also reduced the weight of eccentric block, saved precious metals such as tungsten alloy, reduced cost.
Claims (7)
1. the rotor assembly of a flat brushless DC motor, it is characterized in that, comprise a magnet ring (1), be fixed on eccentric block (2), the plastics inserts (3) in the magnet ring (1) and be fixed on bearing (4) on the described plastics inserts (3), described bearing (4) is positioned on the same axis with described magnet ring (1), described magnet ring (1) is filled with many to N, S magnetic pole along circumferential order, described eccentric block (2) and plastics inserts (3) are respectively cross section and are kidney shape and fan-shaped column.
2. the rotor assembly of flat brushless DC motor according to claim 1 is characterized in that, wherein, described bearing (4) is injection-moulded on the fan-shaped column of described plastics inserts (3).
3. the rotor assembly of flat brushless DC motor according to claim 1 and 2 is characterized in that, described eccentric block (2) and the plastics inserts (3) that has a bearing (4) are solidificated in the described magnet ring (1) with epoxy glue.
4. the rotor assembly of flat brushless DC motor according to claim 3 is characterized in that, the N of described magnet ring (1), S magnetic pole are 3 to 6 pairs.
5. the rotor assembly of flat brushless DC motor according to claim 4 is characterized in that, the N of described magnet ring (1), S magnetic pole are 4 pairs.
6. the rotor assembly of flat brushless DC motor according to claim 5 is characterized in that, described bearing (4) is an oiliness bearing.
7. the rotor assembly of flat brushless DC motor according to claim 6 is characterized in that, described eccentric block (2) is made for tungsten alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03260831 CN2640110Y (en) | 2003-08-08 | 2003-08-08 | Rotor assembly of flat brushless D.C. motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03260831 CN2640110Y (en) | 2003-08-08 | 2003-08-08 | Rotor assembly of flat brushless D.C. motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2640110Y true CN2640110Y (en) | 2004-09-08 |
Family
ID=34296525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03260831 Expired - Lifetime CN2640110Y (en) | 2003-08-08 | 2003-08-08 | Rotor assembly of flat brushless D.C. motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2640110Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7679258B2 (en) | 2006-12-21 | 2010-03-16 | Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. | Eccentric rotor and vibration motor incorporating the eccentric rotor |
| US10291103B2 (en) | 2016-10-13 | 2019-05-14 | SFEG Corp. | Brushless direct current motor with integrated fan |
| US11670977B2 (en) | 2019-04-24 | 2023-06-06 | Black & Decker Inc. | Outer rotor brushless motor stator mount |
-
2003
- 2003-08-08 CN CN 03260831 patent/CN2640110Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7679258B2 (en) | 2006-12-21 | 2010-03-16 | Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. | Eccentric rotor and vibration motor incorporating the eccentric rotor |
| US10291103B2 (en) | 2016-10-13 | 2019-05-14 | SFEG Corp. | Brushless direct current motor with integrated fan |
| US11670977B2 (en) | 2019-04-24 | 2023-06-06 | Black & Decker Inc. | Outer rotor brushless motor stator mount |
| US11973374B2 (en) | 2019-04-24 | 2024-04-30 | Black & Decker Inc. | Outer rotor brushless motor having an axial fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130808 Granted publication date: 20040908 |