CN205001361U - External rotor electric machine and pivot thereof - Google Patents
External rotor electric machine and pivot thereof Download PDFInfo
- Publication number
- CN205001361U CN205001361U CN201520606030.7U CN201520606030U CN205001361U CN 205001361 U CN205001361 U CN 205001361U CN 201520606030 U CN201520606030 U CN 201520606030U CN 205001361 U CN205001361 U CN 205001361U
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- CN
- China
- Prior art keywords
- diameter
- axle bed
- rotating shaft
- external rotor
- pivot
- 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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Abstract
The utility model provides an external rotor electric machine and pivot thereof, this motor include stator and external rotor, the stator include the end cover, the end cover on be equipped with iron core and winding, be equipped with fore bearing and rear bearing in the end cover, the external rotor include casing, iron core, axle bed and pivot, the pivot have with axle bed interference fit's back end subtotal with fore bearing and back bearing clearance complex anterior segment part, its characterized in that the diameter of back end part slightly is greater than the diameter of anterior segment part. The utility model discloses at the impress in -process of axle bed of pivot, in the pivot around with bearing fit's anterior segment part can not receive compression injury to guarantee motor smooth operation. Simultaneously, avoid the pivot to impress by the rear end and the production of the problem of bending that arouses, ensured the performance of motor effectively, reduced cost of maintenance, improved the life of product. Furthermore, the utility model discloses installation simple process is favorable to improving the installation effectiveness.
Description
Technical field
The utility model relates to machine field, particularly relates to external rotor electric machine field, specifically a kind of external rotor electric machine and rotating shaft thereof.
Background technique
The relative common motor of external rotor electric machine, has the features such as efficiency is high, noise is low, lightweight, installation and maintenance are convenient and is widely used, when being especially applied in blower fan field, more having the advantage of compact structure concurrently.The basic structure of existing external rotor electric machine as shown in Figure 1, comprise stator and external rotor, described stator comprises end cap 14, and described end cap 14 is provided with stator core 8 and winding 6, be provided with fore bearing 13 and rear bearing 5 in end cap 14, end cap front end is provided with dust cover 10 and waterproof grommet 11; Described external rotor comprises housing 7, rotor core 9, axle bed 4 and rotating shaft 2, the technological method that described housing 7 adopts alloy aluminum to cast, fixed rotor unshakable in one's determination 9 and axle bed 4, and form rotor windings in rotor core 9 inside, described rotating shaft 2 back segment is fixed in axle bed 4, leading portion is placed in front and back bearings, the front end of described rotating shaft 2 is provided with the split washer 12 preventing rotor from coming off, and the position in described rotating shaft 2 between axle bed 4 and rear bearing 5 is provided with the taper elastic washer 3 adjusting axial machining error.Existing rotating shaft 2 is the circular shaft that the diameter on an arbitrary section is all identical, and the diameter of usual rotating shaft 2 slightly larger than the internal diameter of axle bed 5, thus forms interference fit with axle bed and is fixed on axle bed; The diameter of rotating shaft 2 is simultaneously slightly less than again the internal diameter of front and back bearings, makes rotating shaft 2 can put into brearing bore easily.
In the prior art, rotating shaft 2 is be pressed into the rear end of the front end of rotating shaft from axle bed with a kind of conventional mode of the assembling of axle bed 4.Diameter due to rotating shaft is greater than the internal diameter of axle bed, in process of press in, the surface of rotating shaft leading portion produces irregular Light deformation by the extruding of axle bed, and this Light deformation makes the roughness on rotating shaft surface raise, cause motor rotation not steady, have a strong impact on the performance and used life of motor.
Improve as one, another kind of rotating shaft 2 is be pressed into the front end of the rear end of rotating shaft from axle bed with the assembling mode of axle bed 4.Although this assembling mode solves rotating shaft surface produces Light deformation problem because of pressurized, but due in the process of rotating shaft press-in axle bed, point of application of force is in the front end of rotating shaft, and force bearing point is positioned at the rear end of rotating shaft, ftercompction is easy to curved at the power transmission process shaft compared with long span, make the concentricity of rotating shaft and circle beat undesirable, motor rotation equally also can be caused not steady, thus have a strong impact on the performance and used life of motor.Thus this assembling mode does not also tackle the problem at its root.
Summary of the invention
The problems referred to above being prior art and existing to be solved in the utility model, aiming to provide and a kind of are follow-only applicable to external rotor electric machine, and be applicable to the dedicated spindle of this motor, by changing the structure of rotating shaft, making rotating shaft not produce distortion in assembly process.
For solving the problem, the utility model by the following technical solutions: a kind of external rotor electric machine, comprises stator and external rotor, and described stator comprises end cap, and described end cap is provided with stator core and winding, is provided with fore bearing and rear bearing in stator case end cap; Described rotor comprises housing, rotor core, axle bed and rotating shaft, described rotating shaft has and the hindfoot portion of described axle bed interference fit and the front section that coordinates with described fore bearing and rear bearing, it is characterized in that the diameter of diameter slightly larger than front section of described hindfoot portion.
Of the present utility modelly be applicable to external rotor electric machine, the assembling of rotating shaft and axle bed is also that the mode by being pressed into from the rear end of axle bed the front end of rotating shaft realizes.Because the diameter of hindfoot portion before rotor is different, the diameter of hindfoot portion still makes itself and axle bed keep interference fit slightly larger than the internal diameter of axle bed, simultaneously, the diameter of front section is less than the internal diameter of axle bed, in the process of rotating shaft press-in axle bed, rotating shaft front section can gap be by axle bed easily, and the surface of the front section that rotating shaft coordinates with front and back bearings can not be squeezed and produce damage, thus ensure that the smooth operation of motor.Meanwhile, it also avoid rotating shaft and be pressed into by rear end and the generation of the problem of the press-bending caused, effectively ensure the performance of motor, reduce maintenance cost, improve the working life of product.Further, the utility model mounting process is simple, is conducive to improving installation efficiency.
According to the utility model, the diameter of the rotating shaft of existing blower fan has the regular sizes such as 8mm, 12mm, 15mm, 20mm, 25mm, and the diameter of described hindfoot portion and the diameter difference of front section are advisable with 0.01mm ~ 0.05mm.
The utility model also will provide a kind of dedicated spindle being applicable to external rotor electric machine, this rotating shaft comprises and the hindfoot portion of axle bed interference fit and the front section that coordinates with fore bearing and the rear bearing of stator, it is characterized in that the diameter of diameter slightly larger than front section of described hindfoot portion, and the diameter of front section is less than the internal diameter of axle bed.
Accompanying drawing explanation
Fig. 1 is the structural representation of this outer rotor blower fan.
Fig. 2 is the structural representation of rotating shaft of the present utility model.
Fig. 3 is the amplification view at A place in Fig. 2.
Embodiment
With reference to Fig. 1, the application of a kind of external rotor electric machine of the present utility model on blower fan.This motor comprises stator and external rotor, and described stator comprises end cap 14, and described end cap 14 is provided with stator core 8 and winding 6, is provided with fore bearing 13 and rear bearing 5 in end cap 14, and end cap front end is provided with dust cover 10 and waterproof grommet 11.Described external rotor comprises housing 7, rotor core 9, axle bed 4 and rotating shaft 2, the technological method that described housing 7 adopts alloy aluminum to cast, fixed rotor unshakable in one's determination 9 and axle bed 4, and form rotor windings in rotor core 9 inside, the hindfoot portion 16 of described rotating shaft 2 is fixed in axle bed 4 by interference fit, the front section 15 of rotating shaft is placed in front and back bearings, the front end of described rotating shaft 2 is provided with the split washer 12 preventing rotor from coming off, and the position in described rotating shaft 2 between axle bed 4 and rear bearing 5 is provided with the taper elastic washer 3 adjusting axial machining error.Rotor housing 7 is provided with fan blade 1.
With reference to Fig. 2 and Fig. 3, the diameter of the hindfoot portion 16 of described rotating shaft 2 is slightly larger than the diameter of front section 15, and the diameter of front section 15 is less than the internal diameter of axle bed.
The diameter of described hindfoot portion 16 and the diameter difference δ of front section 15 are 0.01mm ~ 0.05mm.
Rotating shaft 2 of the present utility model and the assembling of axle bed 4 are that the mode by being pressed into from the rear end of axle bed 4 front end of rotating shaft 2 realizes.Because the diameter of hindfoot portion before rotor is different, the diameter of hindfoot portion still makes itself and axle bed keep interference fit slightly larger than the internal diameter of axle bed, simultaneously, the diameter of rotating shaft front section is less than the internal diameter of axle bed, in the process of rotating shaft press-in axle bed, rotating shaft front section can gap be by axle bed easily, and the outer surface of the front section that rotating shaft coordinates with front and back bearings can not be squeezed and produce damage, thus ensure that the smooth operation of motor.
It is understood that above-described embodiment is just to explanation of the present utility model, instead of to restriction of the present utility model, any innovation and creation do not exceeded in the utility model spirit, all fall within protection domain of the present utility model.
Claims (4)
1. an external rotor electric machine, comprise stator and external rotor, described stator comprises end cap (14), described end cap (14) is provided with stator core (8) and winding (6), is provided with fore bearing (13) and rear bearing (5) in end cap (14); Described external rotor comprises housing (7), rotor core (9), axle bed (4) and rotating shaft (2), described rotating shaft (2) has and the hindfoot portion (16) of described axle bed (4) interference fit and the front section (15) with described fore bearing (13) and rear bearing (5) Spielpassung, it is characterized in that the diameter of diameter slightly larger than front section (15) of described hindfoot portion (16), and the diameter of front section (15) is less than the internal diameter of axle bed.
2. a kind of external rotor electric machine as claimed in claim 1, is characterized in that the diameter of described hindfoot portion (16) and the diameter difference (δ) of front section (15) are 0.01mm ~ 0.05mm.
3. the rotating shaft of an external rotor electric machine as claimed in claim 1, comprise and the hindfoot portion (16) of axle bed (4) interference fit and the front section (15) that coordinates with fore bearing (13) and the rear bearing (5) of stator, it is characterized in that the diameter of diameter slightly larger than front section (15) of described hindfoot portion (16), and the diameter of front section (15) is less than the internal diameter of axle bed.
4. the rotating shaft of external rotor electric machine as claimed in claim 3, is characterized in that the diameter of described hindfoot portion (16) and the diameter difference (δ) of front section (15) are 0.01mm ~ 0.05mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520606030.7U CN205001361U (en) | 2015-08-12 | 2015-08-12 | External rotor electric machine and pivot thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520606030.7U CN205001361U (en) | 2015-08-12 | 2015-08-12 | External rotor electric machine and pivot thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205001361U true CN205001361U (en) | 2016-01-27 |
Family
ID=55158250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520606030.7U Expired - Fee Related CN205001361U (en) | 2015-08-12 | 2015-08-12 | External rotor electric machine and pivot thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205001361U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105090229A (en) * | 2015-08-12 | 2015-11-25 | 上海大学 | External rotor electric machine and rotary shaft thereof |
| CN111956099A (en) * | 2020-08-21 | 2020-11-20 | 台州敏瑞科技有限公司 | Cutter shaft assembly and assembling device of material handling machine |
-
2015
- 2015-08-12 CN CN201520606030.7U patent/CN205001361U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105090229A (en) * | 2015-08-12 | 2015-11-25 | 上海大学 | External rotor electric machine and rotary shaft thereof |
| CN111956099A (en) * | 2020-08-21 | 2020-11-20 | 台州敏瑞科技有限公司 | Cutter shaft assembly and assembling device of material handling machine |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160127 Termination date: 20190812 |