CN105099059A - Measures for preventing outer rotor fan rotor from falling - Google Patents
Measures for preventing outer rotor fan rotor from falling Download PDFInfo
- Publication number
- CN105099059A CN105099059A CN201510492488.9A CN201510492488A CN105099059A CN 105099059 A CN105099059 A CN 105099059A CN 201510492488 A CN201510492488 A CN 201510492488A CN 105099059 A CN105099059 A CN 105099059A
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- Prior art keywords
- rotor
- axle bed
- rotating shaft
- blower fan
- rotation shaft
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Abstract
The invention discloses a measure for preventing an outer rotor fan rotor from falling. A stator, an outer rotor and a fan blade are included. An end cover is provided with a stator iron core and a winding, the end cover is internally provided with a front bearing and a rear bearing, the rotor comprises a shell, a rotor iron core, a shaft seat and a rotation shaft, the rear section of the rotation shaft and the shaft seat are in interference fit, the front section is placed in the front bearing and the rear bearing to form clearance fit, the front end of the rotation shaft is provided with an opening retainer ring, a conical elastic washer is arranged at places, located on the shaft seat and the rear bearing, on the rotation shaft, the rear end of the rotation shaft is provided with a clamping groove, the clamping groove is internally provided with a steel wire retainer ring, and the steel wire retainer ring is placed in a counterbore arranged at the rear end of the shaft seat. As the steel wire retainer ring is additionally arranged in the rotation shaft, even if the motor suffers large axial pressure, the steel wire retainer ring can effectively fix the rotor, the rotor can be prevented from falling along the axial direction of the rotation shaft, and the motor can be prevented from being damaged. Assembly is simple, and the overall appearance of the product is not influenced while the rotation shaft can be prevented from falling.
Description
Technical field
The present invention relates to blower fan field, particularly relate to outer rotor blower fan field, specifically a kind of measure preventing outer rotor blower fan rotor from coming off.
Background technology
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 conformation concurrently.The basic structure of existing outer rotor blower fan as shown in Figure 1, comprise stator, external rotor and be arranged on the fan blade 1 on external rotor, described stator comprises end cap 14, described end cap 14 is fixed 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 cap 10 and waterproof grommet 11; Described external rotor comprises housing 7, rotor core 9, axle bed 4 and rotating shaft 2, the process that described housing 7 adopts alloy aluminum to cast, fixed iron core 8 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 mismachining tolerance.
Although, rotating shaft 2 and axle bed 4 are undertaken affixed by interference fit, if axle bed endoporus makes aperture excessive or more coarse in mismachining tolerance, in blower fan application process, by the effect of gravity and fluid deboost, when being axially subject to excessive pressure, external rotor is easily made axially to come off along rotating shaft, cause motor damage, more serious meeting makes the application of blower fan do great damage.
A kind of simple reinforcement means makes rotating shaft 2 and axle bed 4 reliable fixing further by welding manner.But namely this reinforcement means adds one post-order process, simultaneously also make to cause motor rear end surface irregularity, affect serviceability and attractive in appearance.
Summary of the invention
The present invention is to solve the problems referred to above that prior art exists, aim to provide a kind of measure preventing outer rotor blower fan rotor from coming off.
For solving the problem, the present invention is by the following technical solutions: a kind of measure preventing outer rotor blower fan rotor from coming off, the fan blade that described blower fan comprises stator, external rotor and is arranged on external rotor, described stator end cap, described end cap is provided with iron core and winding, be provided with fore bearing and rear bearing in end cap, end cap front end is provided with dust cap and waterproof grommet; Described external rotor comprises housing, iron core, axle bed and rotating shaft; Described rotating shaft back segment and described axle bed interference fit, leading portion to be placed in described fore bearing and rear bearing and to form matched in clearance, the front end of described rotating shaft is provided with split washer, described rotating shaft is positioned at axle bed and rear bearing place is provided with the taper elastic washer adjusting axial mismachining tolerance, it is characterized in that the rear end of described rotating shaft offers draw-in groove, be provided with elastic spring in described draw-in groove, and be placed in the counterbore offered described axle bed rear end.
The measure preventing outer rotor blower fan rotor from coming off of the present invention, owing to increasing elastic spring in rotating shaft, even if when motor is subject to larger axial compressive force, elastic spring can effective fixed rotor, make it come off vertically, avoid the motor damage caused thus, equipment is done great damage.Further, the present invention assembles simply, reach prevent rotating shaft from coming off while do not affect again the overall appearance of product.
According to the present invention, between the counterbore of described axle bed rear end and the center mounting hole of axle bed, pass through chamfered transition.Chamfering on the one hand can facilitate last item, on the other hand when axle bed and rotating shaft fixing loosens, can tighten up elastic spring further, and then prevention rotor drops.Described chamfering can be down flat angle, also can be rounding.
According to the present invention, described elastic spring is similar axle elastic opening back-up ring.
According to the present invention, described elastic spring is axle elastic opening back-up ring, also can be national standard part circlip for shaft A or circlip for shaft B.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing outer rotor blower fan.
Fig. 2 is the structural representation of outer rotor blower fan of the present invention.
Fig. 3 is the structural representation of rotating shaft of the present invention and axle bed coupling part.
Fig. 4 is the structural representation of axle bed of the present invention.
Fig. 5 is the structural representation of rotating shaft hindfoot portion of the present invention.
Fig. 6 is the structural representation of elastic spring of the present invention.
Embodiment
Fig. 1 is the structural representation of existing outer rotor blower fan, describes, and do not repeat them here before its defect.
With reference to Fig. 2, a kind of measure preventing outer rotor blower fan rotor from dropping of the present invention, described blower fan comprises stator, external rotor and is arranged on the fan blade 1 on external rotor, and described stator comprises end cap 14, and described end cap 14 is provided with stator core 8 and winding 6, fore bearing 13 and rear bearing 5 is provided with in end cap 14, end cap front end is provided with dust cap 10, is respectively provided with groove in the junction of end cap front end and dust cap 10, is provided with O shape waterproof grommet 11 in groove, resilient engagement waterproof, axially can not drop out.Described external rotor comprises housing 7, rotor core 9, axle bed 4 and rotating shaft 2, the process 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, and leading portion is placed in front and back bearings.Position in described rotating shaft 2 between axle bed 4 and rear bearing 5 is provided with the taper elastic washer 3 of damping.
Composition graphs 3, Fig. 4, Fig. 5 and Fig. 6, the rear end of described rotating shaft 2 offers draw-in groove 21, is provided with elastic spring 22 in described draw-in groove 21.Described elastic spring 22 is axle elastic opening back-up ring, also can be national standard part circlip for shaft A or circlip for shaft B, as the circlip for shaft of GBT895.2 standard recommendation.The rear end of described axle bed 4 offers counterbore 23, and described elastic spring 22 falls in this counterbore 23 after mounting.
By chamfering 25 transition between the counterbore 23 of described axle bed 4 rear end and the center mounting hole 24 of axle bed 4.This chamfering 25 can be the straight angle or fillet, and what adopt in the present embodiment is be down flat angle.This chamfering 25 1 aspect can facilitate last item, on the other hand when axle bed 4 and rotating shaft 2 fixing loosens, can tighten up elastic spring 22 further, and then stop rotor 2 to drop.
When motor is installed, first elastic spring 22 is pressed in the draw-in groove 21 of rotating shaft 2, then rotating shaft 2 is pressed in axle bed 4, by both interference fit, make rotating shaft 2 affixed with external rotor.Then, in rotating shaft 2, put into taper elastic washer 3, from the rear bearing 5 stator and fore bearing 13 matched in clearance through rotating shaft 2, then install split washer 12 and come off in order to prevent rotor to be subject to axial force.Taper elastic washer 3, for eliminating the end play between stator and rotor, makes bearing and rotor be subject to suitable axial force, and axially free relative motion does not occur.
It is understood that above-described embodiment is just to explanation of the present invention, instead of limitation of the present invention, any innovation and creation do not exceeded in spirit of the present invention, all fall within protection scope of the present invention.
Claims (5)
1. the measure preventing outer rotor blower fan rotor from coming off, described blower fan comprises stator, external rotor and is arranged on the fan blade (1) on external rotor, described stator comprises end cap (14), 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 cap (10) and waterproof grommet (11), described external rotor comprises housing (7), rotor core (8), axle bed (4) and rotating shaft (2), described rotating shaft (2) back segment and described axle bed (4) interference fit, leading portion to be placed in described fore bearing (13) and rear bearing (5) and to form matched in clearance, the front end of described rotating shaft (2) is provided with split washer (12), described rotating shaft (2) is positioned at axle bed (4) and rear bearing (5) place is provided with the taper elastic washer (3) adjusting axial mismachining tolerance, it is characterized in that the rear end of described rotating shaft (2) offers draw-in groove (21), elastic spring (22) is provided with in described draw-in groove (21), and be placed in the counterbore (23) offered described axle bed (4) rear end.
2. a kind of measure preventing outer rotor blower fan rotor from coming off as claimed in claim 1, is characterized in that between the counterbore (23) of described axle bed (4) rear end and the center mounting hole (24) of axle bed (4) by chamfering (25) transition.
3. a kind of measure preventing outer rotor blower fan rotor from coming off as claimed in claim 2, is characterized in that described chamfering (25) is the straight angle or fillet.
4. a kind of measure preventing outer rotor blower fan rotor from coming off according to claim 1, is characterized in that described elastic spring (22) is for axle elastic opening back-up ring.
5. a kind of measure preventing outer rotor blower fan rotor from coming off as claimed in claim 1, is characterized in that described elastic spring (22) is for national standard part circlip for shaft A or circlip for shaft B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510492488.9A CN105099059A (en) | 2015-08-12 | 2015-08-12 | Measures for preventing outer rotor fan rotor from falling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510492488.9A CN105099059A (en) | 2015-08-12 | 2015-08-12 | Measures for preventing outer rotor fan rotor from falling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105099059A true CN105099059A (en) | 2015-11-25 |
Family
ID=54578870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510492488.9A Pending CN105099059A (en) | 2015-08-12 | 2015-08-12 | Measures for preventing outer rotor fan rotor from falling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105099059A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972680A (en) * | 2017-05-11 | 2017-07-21 | 珠海格力节能环保制冷技术研究中心有限公司 | Bearing assembly and the motor with it |
| CN108390499A (en) * | 2017-02-03 | 2018-08-10 | 信浓绢糸株式会社 | Motor and air blower |
| CN112026799A (en) * | 2020-08-17 | 2020-12-04 | 眉山中车制动科技股份有限公司 | Anti-loosening structure of dust cover |
| CN117650643A (en) * | 2024-01-30 | 2024-03-05 | 上海舟水电器有限公司 | Energy-saving environment-friendly brushless direct current motor for dust collector |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050062351A1 (en) * | 2003-09-18 | 2005-03-24 | Mathias Berwert | Electric motor and method for its production |
| CN2777832Y (en) * | 2005-02-06 | 2006-05-03 | 浙江工业大学 | External rotor asynchronous motor |
| CN201202684Y (en) * | 2008-05-27 | 2009-03-04 | 杭州微光电子设备厂 | Outer rotor axial flow fan |
| CN202696333U (en) * | 2012-05-25 | 2013-01-23 | 常州富兴机电有限公司 | Axial rotor fixing structure |
| CN203562854U (en) * | 2013-10-12 | 2014-04-23 | 金华金力士泵业有限公司 | Small motor rotor |
-
2015
- 2015-08-12 CN CN201510492488.9A patent/CN105099059A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050062351A1 (en) * | 2003-09-18 | 2005-03-24 | Mathias Berwert | Electric motor and method for its production |
| CN2777832Y (en) * | 2005-02-06 | 2006-05-03 | 浙江工业大学 | External rotor asynchronous motor |
| CN201202684Y (en) * | 2008-05-27 | 2009-03-04 | 杭州微光电子设备厂 | Outer rotor axial flow fan |
| CN202696333U (en) * | 2012-05-25 | 2013-01-23 | 常州富兴机电有限公司 | Axial rotor fixing structure |
| CN203562854U (en) * | 2013-10-12 | 2014-04-23 | 金华金力士泵业有限公司 | Small motor rotor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390499A (en) * | 2017-02-03 | 2018-08-10 | 信浓绢糸株式会社 | Motor and air blower |
| CN106972680A (en) * | 2017-05-11 | 2017-07-21 | 珠海格力节能环保制冷技术研究中心有限公司 | Bearing assembly and the motor with it |
| CN106972680B (en) * | 2017-05-11 | 2023-10-03 | 珠海格力节能环保制冷技术研究中心有限公司 | Bearing assembly and motor with same |
| CN112026799A (en) * | 2020-08-17 | 2020-12-04 | 眉山中车制动科技股份有限公司 | Anti-loosening structure of dust cover |
| CN117650643A (en) * | 2024-01-30 | 2024-03-05 | 上海舟水电器有限公司 | Energy-saving environment-friendly brushless direct current motor for dust collector |
| CN117650643B (en) * | 2024-01-30 | 2024-04-05 | 上海舟水电器有限公司 | Energy-saving environment-friendly brushless direct current motor for dust collector |
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Application publication date: 20151125 |
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