CN202513699U - External rotor of small-sized permanent magnetic brushless direct current external rotor electric machine - Google Patents
External rotor of small-sized permanent magnetic brushless direct current external rotor electric machine Download PDFInfo
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- CN202513699U CN202513699U CN2012201430728U CN201220143072U CN202513699U CN 202513699 U CN202513699 U CN 202513699U CN 2012201430728 U CN2012201430728 U CN 2012201430728U CN 201220143072 U CN201220143072 U CN 201220143072U CN 202513699 U CN202513699 U CN 202513699U
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- external rotor
- electric machine
- housing
- brushless direct
- side wall
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Abstract
An external rotor of a small-sized permanent magnetic brushless direct current external rotor electric machine comprises an iron shell body with magnetic conductivity. The shell body is in a barrel shape with a radial bottom wall and an axial side wall, and an inner side of the axial side wall of the shell body is fixedly connected with a permanent magnet. The external rotor is characterized in that the shell body is formed by punching and wall thickness of the axial side wall of the shell body is at least 2.5+/-0.2 millimeter. Due to the characteristics, the external rotor of the small-sized permanent magnetic brushless direct current external rotor electric machine solves the problem of production cost and can be applied to the small-sized permanent magnetic brushless direct current external rotor electric machine.
Description
Technical field
The present invention relates to minitype permanent magnetism brushless direct-current external rotor electric machine, particularly be applied to the outer-rotor structure of the minitype permanent magnetism brushless direct-current external rotor electric machine on the small household electrical appliances such as electric fan.
Background technology
At present; Minitype permanent magnetism brushless direct-current external rotor electric machine is because its energy consumption is little; Using the small household electrical appliances such as electric fan of power about 100 watts to obtain using fast, how to practice thrift manufacturing cost and make product have good serviceability, be the problem of updating in the electric equipment products manufacturing.The irony housing of the external rotor of traditional minitype permanent magnetism brshless DC motor, general thickness also passes through stamped, casting or machine work manufacturing greater than 3 millimeters or 3.5 millimeters.Though the serviceability of external rotor is good, adopt manufacturing employed diel of irony housing of punching stretch technology and press machine very huge and complicated, the concentricity of particularly stretched external rotor is difficult with control, thus manufacturing cost is quite high; If the thickness of irony housing is too thin,, in order to make thickness, adopt casting technique and process for machining manufacturing in large quantities greater than the external rotor more than 3 millimeters though processing causes that motor noise is big, the motor feels hot amount is big easily for this reason.Though the course of processing is long but casting pattern manufacturing equipment is simple, operation causes cost still than higher more.For this reason, Chinese patent ZL200820099436.0 utility model has disclosed a kind of rotor of external rotor permanent magnet brshless DC motor, comprises the rotor case and the axle of motor; Characteristics are: said rotor case is injection molded with Magnaglo and resin binder, and axle is fixed on the central authorities of rotor case when injection moulding.Its advantage does; Because rotor case forms as an integral molded plastic with axle, has adopted accurate injection mold to control during production, has the dimensional accuracy height, air gap is even, cost is low, operation is few; Advantages such as the good concentricity of product, but its magnetic property difference and manufacturing cost are high.
Summary of the invention
Deficiency to prior art; The object of the invention mainly is to solve the problem of the cost of manufacturing; A kind of external rotor of minitype permanent magnetism brushless direct-current external rotor electric machine is proposed; Comprise the irony housing with magnetic property, said housing is tubbiness and has radially diapire and axial side wall, at the permanent magnet that fixedly connected to the inner side of the axial side wall of said housing; It is characterized in that, said housing through punch forming and at least the wall thickness of its axial side wall be 2.5 ± 0.2 millimeters.
Further technical scheme can also be on the joint face between the axial side wall of said housing and the said permanent magnet asperities to be set.
According to technique scheme; The inventor finds through repetition test; Particularly the thickness of its axial side wall is between 2.5 ± 0.2 millimeters for the wall thickness that designs said housing, and can select nominal thickness is the former sheet material of 2.5 millimeter, adopts the stamping machine of low tonnage and simple mould to carry out the said housing of stamped; Not only can reduce the cost of mfg. moulding die, thus and relatively good can directly use of the concentricity of the said housing that stamps out and turning processing once more.Secondly the thickness of said housing also is unlikely to too thin and causes the magnetic property variation and occur too high Rotation Noise significantly.On the madial wall of the axial side wall of said housing asperities is set, can so that between inboard permanent magnet and the said housing employing bonding process combine.
Because the present invention has These characteristics and advantage, can be applied in the minitype permanent magnetism brushless direct-current external rotor electric machine.
Description of drawings
Fig. 1 is the structural representation of minitype permanent magnetism brushless direct-current external rotor electric machine;
Fig. 2 is the structural representation of external rotor.
Embodiment
Below in conjunction with accompanying drawing the structure of the external rotor of using technical scheme of the present invention is made and to specify.
As depicted in figs. 1 and 2, minitype permanent magnetism brushless direct-current external rotor electric machine comprises end cap 3, is connected in the stator 4 on the said end cap 3, is arranged on the peripheral housing that is tubbiness 1 of stator 4, is arranged on the rotating shaft 2 of said stator 4 central authorities rotationally; Be provided with front and back bearings in the medium pore of wherein said stator 4, said rotating shaft 2 is supported on the front and back bearings.One end setting-in of said rotating shaft 2 is in the location hole 14 of the middle position of the radially diapire 11 of said housing 1, and the other end is used to connect trailing parts such as blast fan etc. after passing said end cap 3.
As shown in Figure 2, thereby being tubbiness, said housing 1 has radially diapire 11 and axial side wall 12, said rotating shaft 2 is connected the middle position of said radially diapire 11.Said housing 1 also comprises the permanent magnet 13 of the inboard that is arranged on said axial side wall 12, is used for responding to the magnetic field of said stator 4 variations and makes said external rotor 1 produce revolving force.Said housing 1 and permanent magnet 13 connect and compose the external rotor of said motor.The thickness δ of said housing 1 is arranged on 2.5 millimeter, and promptly can select the GB nominal thickness is 2.5 millimeters steel plate materials, cuts through punching stretch, make said housing 1 particularly the thickness δ of its axial side wall 12 be controlled at last in 2.5 ± 0.2 millimeters.So not only processing cost is low, the said housing 1 that processes good concentricity and can directly use.
Secondly on the axial side wall 12 of said housing 1 and the joint face between the said permanent magnet 13 asperities (not drawing among the figure) is set, thus said permanent magnet 13 is bondd or the medial surface of the axial side wall 12 of the said housing 1 that is crimped onto on bonding strength improve greatly.
Claims (2)
1. the external rotor of minitype permanent magnetism brushless direct-current external rotor electric machine comprises the irony housing with magnetic property, and said housing is tubbiness and has radially diapire and axial side wall, at the permanent magnet that fixedly connected to the inner side of the axial side wall of said housing; It is characterized in that, said housing through punch forming and at least the wall thickness of its axial side wall be 2.5 ± 0.2 millimeters.
2. the external rotor of minitype permanent magnetism brushless direct-current external rotor electric machine according to claim 1 is characterized in that, on the joint face between the axial side wall of said housing and the said permanent magnet asperities is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201430728U CN202513699U (en) | 2012-03-31 | 2012-03-31 | External rotor of small-sized permanent magnetic brushless direct current external rotor electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201430728U CN202513699U (en) | 2012-03-31 | 2012-03-31 | External rotor of small-sized permanent magnetic brushless direct current external rotor electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202513699U true CN202513699U (en) | 2012-10-31 |
Family
ID=47066156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201430728U Expired - Fee Related CN202513699U (en) | 2012-03-31 | 2012-03-31 | External rotor of small-sized permanent magnetic brushless direct current external rotor electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202513699U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880064A (en) * | 2014-07-14 | 2018-11-23 | 常州合力电器有限公司 | The simple brushless motor outer rotor assembly of structure |
-
2012
- 2012-03-31 CN CN2012201430728U patent/CN202513699U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880064A (en) * | 2014-07-14 | 2018-11-23 | 常州合力电器有限公司 | The simple brushless motor outer rotor assembly of structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160413 Address after: 528311 Beijiao City, Foshan province Shunde District, the town of Canton Industrial Development Zone, No. 2, No. two Patentee after: Foshan Jiling Electric Appliance Science and Technology Co., Ltd. Address before: 528311, Guangdong District, Foshan City, Shunde District, Jiao Tong Town, 2 Industrial Development Zone, Foshan District, Shunde smart electric Co., Ltd. Patentee before: Feng Zeji |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: He Jiayu Document name: Notice of termination of patent right |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20210331 |