CN2546670Y - Self-floating radiating fan - Google Patents
Self-floating radiating fan Download PDFInfo
- Publication number
- CN2546670Y CN2546670Y CN 02216831 CN02216831U CN2546670Y CN 2546670 Y CN2546670 Y CN 2546670Y CN 02216831 CN02216831 CN 02216831 CN 02216831 U CN02216831 U CN 02216831U CN 2546670 Y CN2546670 Y CN 2546670Y
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- CN
- China
- Prior art keywords
- rotor
- self
- ring
- rotating shaft
- shell
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- 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
Disclosed is a self-floating cooling fan, comprising a rotor provided with a fan vane and a rotary shaft, a stator provided with an iron core and a coil, a circuit board and a shell. The utility model is characterized in that a magnet which is opposite to the iron core of the stator is arranged on the inner peripheral wall of the rotor; the free end of the rotary shaft is a cone end; a top cover provided with a center and a concavity is fixed arranged on one end where a base hole is arranged of the fixed base at the center of the shell; the cone end of the rotary shaft is arranged in the concavity. The technical problems such as the rotor friction of the fan vane and the noise are solved by the utility model.
Description
Technical field:
The utility model is about DC fan, particularly about come the brushless DC fan of support rotor with magnetic force.
Background technique:
The radiation fan that computer, surveying instrument use is small-sized brushless DC fan, and its stator is fixed on the fixed base at shell center, and the rotor winding with flabellum is in the stator periphery.Present this class brushless DC fan, the rotating shaft of its rotor is not in the oil-containing sliding bearing that is bearing in the fixed base seat hole, is exactly in the ball bearing in the present hole of supporting.Use oil-containing sliding bearing, though structure is simple, price is also cheap, the area of contact of rotating shaft and bearing is big, and frictional force is just big, and not only power consumption is big, and it is also big to wear and tear, so working life is short.In addition, the bearing play easily is that the condensation product of oil gas blocks, and startup has some setbacks.Use ball bearing can overcome above-mentioned shortcoming, but its complex structure, price is far above oil-containing sliding bearing, and can produce big noise, influences the proper functioning of main frame.
Summary of the invention:
The purpose of this utility model is to provide a kind of self-floating type radiation fan, with the rotating shaft friction that solves its flabellum rotor and the technical problem of noise.
The technological scheme that the utility model solves the problems of the technologies described above is as follows:
A kind of self-floating type radiation fan comprises the rotor with flabellum and rotating shaft, the stator with iron core and coil, circuit board and shell, it is characterized in that: this rotor inner circle wall is provided with the magnet relative with stator iron core; The free end of the rotating shaft of this rotor is a cone segments; The fixed base seat Kong Yiduan center of being set with at this shell center has the top cover of pit, and the cone segments of above-mentioned rotating shaft is located in this pit.
Above-mentioned self-floating type radiation fan is characterized in that: this magnet and iron core opposing end faces are respectively corresponding sphere or conical surface.
Above-mentioned self-floating type radiation fan is characterized in that: be provided with the metallic shield circle between the plastic rotor shell of this rotor and magnet.
Above-mentioned self-floating type radiation fan is characterized in that: be provided with the protector that comprises limited ring and back-up ring; Above-mentioned limited ring is fixed in the other end in shell center fixation seat seat hole; Above-mentioned back-up ring is fixed in the rotating shaft between top cover and the limited ring.
The utlity model has following advantage:
1, simple in structure, be convenient to make;
2, save bearing, reduce cost;
3, rotor is suspended in the stator periphery, only have the rotating shaft tapered end a bit to contact with top cover during rotation, and axial pressure is again little, and it is little, both laborsaving therefore to rub, and does not have wearing and tearing again, long service life;
Noiseless when 4, working starts smooth and easy.
Description of drawings:
Fig. 1 is a kind of structural representation of the utility model.
Fig. 2 is the structural representation that the utlity model has protector.
Embodiment:
Referring to Fig. 1, the utility model comprises rotor 4, stator 5, circuit board 3 and shell 1.Shell 1 center is provided with the fixed base 11 in tool seat hole 12.Stator 5 includes iron core 52 and coil 51.This stator 5 is fixed on the periphery wall of fixed base 11.Rotor 4 is arranged on the periphery of stator 5, comprises flabellum 41 and rotating shaft 42.Flabellum 41 is fixedly installed on the periphery wall of rotor shell 43, for weight reduction be convenient to make, and rotor shell 43 and flabellum 41 plastics integrated injection molding usually.Rotating shaft 42 1 ends are fixed on rotor shell 43 center portions, and its free end is a tapered end 421.Rotor shell 43 inner circle walls are provided with the corresponding magnet 44 of iron core of a circle and stator 5.For the extraneous electrical equipment facility of the magnetic interference that prevents magnet 44, between magnet 44 and rotor shell 43, be provided with metallic shield circle 45.In the seat hole 12 at shell 1 center, be provided with the top cover 2 that the one end is stopped up sealing.The end face center that this top cover 2 is positioned at a hole 12 is provided with pit 21, the tapered end 421 of above-mentioned rotating shaft 42 is located in this pit 21, because the magnet 44 of rotor 4 and the suction mutually of the iron core 52 of stator 5, and tapered end 421 contact with the point of arc pit 21 against, make rotor 4 reposefully from floating over the periphery of stator 5.Magnet 44 and iron core 52 opposing end faces can be respectively corresponding sphere or conical surface; Like this, even rotor 4 deflection to some extent can not make their contacts bump against yet.Because iron core 52 is to form by silicon steel sheet is stacked, above-mentioned sphere or conical surface are an approximate sphere or conical surface.
For preventing the unexpected pendulum vibrations of fan, the utility model is provided with the protector 6 that comprises limited ring 62 and back-up ring 61.This limited ring 62 is provided with near the other end in present hole 12, it can with shell 1 one-body molded manufacturing.The center hole that this limited ring 62 is passed through in rotating shaft 42 stretches in the hole 12.This back-up ring 61 is arranged on rotating shaft 42 and stretches on the axle body in the hole 12.Between the center hole of limited ring 62 and the rotating shaft 42 bigger gap is arranged; And big gap is equally also arranged between back-up ring 61 and the limited ring 62, generally speaking, be non-touching between them.When fortuitous event, protector 6 can keep effectively rotor 4 from state of suspension, rotor 4 is deviate from.
Claims (5)
1, a kind of self-floating type radiation fan comprises the rotor with flabellum and rotating shaft, the stator with iron core and coil, circuit board and shell, it is characterized in that: this rotor inner circle wall is provided with the magnet relative with stator iron core; The free end of the rotating shaft of this rotor is a cone segments; The fixed base seat Kong Yiduan center of being set with at this shell center has the top cover of pit, and the cone segments of above-mentioned rotating shaft is located in this pit.
2, self-floating type radiation fan according to claim 1 is characterized in that: this magnet and iron core opposing end faces are respectively corresponding sphere or conical surface.
3, self-floating type radiation fan according to claim 1 and 2 is characterized in that: be provided with the metallic shield circle between the plastic rotor shell of this rotor and magnet.
4, self-floating type radiation fan according to claim 1 and 2 is characterized in that: be provided with the protector that comprises limited ring and back-up ring; Above-mentioned limited ring is fixed in the other end in shell center fixation seat seat hole; Above-mentioned back-up ring is fixed in the rotating shaft between top cover and the limited ring.
5, self-floating type radiation fan according to claim 3 is characterized in that: be provided with the protector that comprises limited ring and back-up ring; Above-mentioned limited ring is fixed in the other end in shell center fixation seat seat hole; Above-mentioned back-up ring is fixed in the rotating shaft between top cover and the limited ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02216831 CN2546670Y (en) | 2002-04-16 | 2002-04-16 | Self-floating radiating fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02216831 CN2546670Y (en) | 2002-04-16 | 2002-04-16 | Self-floating radiating fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2546670Y true CN2546670Y (en) | 2003-04-23 |
Family
ID=33695763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02216831 Expired - Fee Related CN2546670Y (en) | 2002-04-16 | 2002-04-16 | Self-floating radiating fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2546670Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1299009C (en) * | 2003-10-17 | 2007-02-07 | 台达电子工业股份有限公司 | Radiating fan |
| CN100453820C (en) * | 2005-07-15 | 2009-01-21 | 富准精密工业(深圳)有限公司 | Radiating fan |
| US7759832B2 (en) | 2003-10-08 | 2010-07-20 | Delta Electronics, Inc. | Fan |
| CN102808802A (en) * | 2011-06-03 | 2012-12-05 | 深圳市顺合泰电机有限公司 | Oily fan with magnetic attraction function |
| CN107919759A (en) * | 2016-10-05 | 2018-04-17 | 昆山广兴电子有限公司 | micro motor and rotor thereof |
-
2002
- 2002-04-16 CN CN 02216831 patent/CN2546670Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7759832B2 (en) | 2003-10-08 | 2010-07-20 | Delta Electronics, Inc. | Fan |
| CN1299009C (en) * | 2003-10-17 | 2007-02-07 | 台达电子工业股份有限公司 | Radiating fan |
| CN100453820C (en) * | 2005-07-15 | 2009-01-21 | 富准精密工业(深圳)有限公司 | Radiating fan |
| CN102808802A (en) * | 2011-06-03 | 2012-12-05 | 深圳市顺合泰电机有限公司 | Oily fan with magnetic attraction function |
| CN107919759A (en) * | 2016-10-05 | 2018-04-17 | 昆山广兴电子有限公司 | micro motor and rotor thereof |
| CN107919759B (en) * | 2016-10-05 | 2019-11-22 | 昆山广兴电子有限公司 | Micro motor and its rotor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: SUN DUHUA TO: YUANSHAN ELECTRICAL APPLIANCES INDUSTRIAL CO., LTD., SHANGHAI |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Shanghai Jiading District Malu Town, Baoan No. 2778 Patentee after: Yuanshan Electric Industry Co., Ltd., Shanhai Address before: West head of eight West Village, Jingjiang Town, Jiangsu Patentee before: Sun Duhua |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030423 |