US20040135442A1 - Outer rotor structure for an ac fan - Google Patents
Outer rotor structure for an ac fan Download PDFInfo
- Publication number
- US20040135442A1 US20040135442A1 US10/340,786 US34078603A US2004135442A1 US 20040135442 A1 US20040135442 A1 US 20040135442A1 US 34078603 A US34078603 A US 34078603A US 2004135442 A1 US2004135442 A1 US 2004135442A1
- Authority
- US
- United States
- Prior art keywords
- outer rotor
- recessions
- pole plate
- fan
- pole plates
- 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.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Abstract
An outer rotor structure for the ac fan mainly comprises a plurality of annular pole plates used to stack each other to form an outer rotor. Each of the pole plate includes an axial hole, a plurality of poles, at least one aligning member and a plurality of recessions. The aligning member is used to align the two adjacent pole plates for stacking so that the recessions of the pole plate are turned a slight angle in stacked relationship with those of the adjacent pole plate. The longitudinally connected recessions are formed a plurality of assembling members adapted to mount ends of metal blades therein at predetermined positions by welding.
Description
- 1. Field of the Invention
- The present invention is related to an outer rotor structure for an ac fan and more particularly to the outer rotor structure adapted to combine with metal blades for conveniently assembling.
- 2. Description of the Related Art
- Referring to FIG. 1, a conventional ac fan includes an
outer rotor 9. Theouter rotor 9 is generally consisted of a plurality ofannular pole plates 90, which are stacked each other. The stackedpole plates 90 are combined with arotor hub 91. A plurality ofblades 92 are equi-spaced and welded on an outer circumference of theouter rotor 9. - In order to rotate the
outer rotor 9 balanceable, theconventional blades 92 must be equi-spaced precise around an outer periphery of theouter rotor 9. Thereby, it can be seen that a need remains for precision instruments, such as clamp, for finding out precise welding points of theblades 92 positioned on the outer circumference of theouter rotor 9. In attempting to determine these welding points, assembly/manufacturing operations are sophisticated and time-wasted. Moreover, in initially welding operation no fixing support exists between any two welding points of theblades 92 and thereby a unilateral force biases the first welding one of theblades 92. Theblade 92 is relatively shifted on theouter rotor 9. Consequently, the combined blade and outer rotor member is unsymmetrical in structure and unbalance in rotation that the unsymmetrical blades cause vibration and noise. - The present invention intends to provide an outer rotor structure for an ac fan adapted to combine with metal blades in such a way to mitigate and overcome the above problem.
- The primary objective of this invention is to provide an outer rotor structure for an ac fan adapted to combine with metal blades for conveniently assembling and manufacture.
- The secondary objective of this invention is to provide the outer rotor structure for the ac fan having assembling members to mount metal blades at predetermined positions and angle, thereby rotating the rotor stable and balance.
- The outer rotor structure for the ac fan in accordance with the present invention mainly comprises a plurality of annular pole plates used to stack each other to form an outer rotor. Each of the pole plate includes an axial hole, a plurality of poles, at least one aligning member and a plurality of recessions. The aligning member is used to align the two adjacent pole plates for stacking so that the recessions of the pole plate are turned a slight angle in stacked relationship with those of the adjacent pole plate. The longitudinally connected recessions are formed a plurality of assembling members adapted to mount ends of metal blades therein at predetermined positions by welding.
- Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description and the accompanying drawings.
- The present invention will now be described in detail with reference to the accompanying drawings herein:
- FIG. 1 is an exploded perspective view of a conventional outer rotor structure for an ac fan in accordance with the prior art;
- FIG. 2 is an exploded perspective view of an outer rotor structure for an ac fan in accordance with an embodiment of the present invention;
- FIG. 3 is a perspective view of the outer rotor structure for the ac fan in accordance with the embodiment of the present invention;
- FIG. 4 is a top view of the outer rotor structure for the ac fan in accordance with the embodiment of the present invention; and
- FIG. 5 is a cross-sectional view, taken along line5-5, of the outer rotor structure for the ac fan in accordance with the embodiment of the present invention.
- Referring to FIGS. 2 and 3, an outer rotor of an embodiment includes a plurality of
annular pole plates 10 stacked to form anouter rotor 1 and arotor hub 22 attached thereto. A plurality ofmetal blades 20 is connected to an outer circumference of theouter rotor 1 to form a fan wheel 2. - Construction of the
annular pole plate 10 shall be described in detail. Referring again to FIGS. 2 and 3, thepole plate 10 is made of conventional silicon steel plate or any other suitable material and formed with substantial ring member. Eachpole plate 10 is provided with anaxial hole 11 and a plurality ofpoles 12 arranged therein so that the stackedpole plates 10 are able to form as anouter rotor 1 in which an inner stator (not shown) is contained. Thepoles 12 of theouter rotor 1 are driven to rotate by induction of the stator. Eachpole plate 10 includes at least one aligningmember 13 as a complemented depression and protrusion formed on both side surfaces by press operation. The aligningmember 13 is used to align the twoadjacent pole plates 10 for stacking at a predetermined position. Accordingly, correct alignment of assembling operation is insured. Eachpole plate 10 further includes plurality ofrecessions 14, such as seven members, equi-spaced around an outer circumference. When any twopole plates 10 are stacked along a vertical line defined by the aligningmembers 13, therecessions 14 of thepole plate 10 are turned a slight angle in stacked relationship with those of theadjacent pole plate 10. After thepole plates 10 are stacked to form theouter rotor 1, the longitudinally connectedrecessions 14 are formed a series of equi-spaced assemblingmembers 15, which are extended helical in an inclined direction with respect to the outer circumference. The assemblingmembers 15 are adapted to mount ends ofmetal blades 22 therein at predetermined positions by welding. - Construction of the
metal blade 20 shall be described in detail. Referring again to FIGS. 2 through 4, themetal blades 20 has identical configuration, dimensions, and weight. Eachblade 20 includes anend 21 used to insert into the associated assemblingmember 15 and securely connected thereto by welding. - Referring again to FIG. 3, the
pole plates 10 are axially stacked along the aligningmembers 13 to form the outer rotor I and therotor hub 22 is compactly attached thereto as a unit. In welding operation theend 21 of theblades 20 is inserted into the helical assemblingmembers 15 while the other end radially extending outward. Consequently, the entire structure of the fan wheel 2 is intensified. - Referring to FIGS. 4 and 5, since the outer circumference of the
outer rotor 1 is provided with the helical assemblingmembers 15, theblades 20 are able to connect precise thereto without any assistance of aligning facility. The finished product of the fan wheel 2 may perform desired balance in rotation. - Referring back to FIGS. 1 and 3, the outer circumference of the
conventional rotor hub 91 has no fixing support for welding points and thereby a unilateral force biases the first welding one of theblades 91. However, the outer circumference of theouter rotor 1 of the present invention is provided with the helical assemblingmembers 15, which may eliminate any aligning facility in operation. Consequently, manufacture operation is speeded up and convenient. - Although the invention has been described in detail with reference to its presently preferred embodiment, it will be understood by one of ordinary skill in the art that various modifications can be made without departing from the spirit and the scope of the invention, as set forth in the appended claims.
Claims (5)
1. An outer rotor comprising:
a plurality of annular pole plates, each of which having an axial hole and a plurality of recessions arranged around an outer circumference, the stacked pole plates are provided with a plurality of helical assembling members formed by the connected recessions; and
a plurality of metal blades, each of which including an end connected to the associated assembling member.
2. The outer rotor as defined in claim 1 , wherein the recessions are equi-spaced on the outer circumference of the pole plate.
3. The outer rotor as defined in claim 1 , wherein the assembling members are equi-spaced on the outer circumference of the stacked pole plates.
4. The outer rotor as defined in claim 1 , wherein the pole plate further include at least aligning member so that any two of the pole plates are stacked along a vertical line defined by the aligning members.
5. The outer rotor as defined in claim 4 , wherein the aligning member is formed as a complemented depression and protrusion defined on both side surfaces of the pole plate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/340,786 US6762519B1 (en) | 2003-01-13 | 2003-01-13 | Outer rotor structure for an ac fan |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/340,786 US6762519B1 (en) | 2003-01-13 | 2003-01-13 | Outer rotor structure for an ac fan |
Publications (2)
Publication Number | Publication Date |
---|---|
US6762519B1 US6762519B1 (en) | 2004-07-13 |
US20040135442A1 true US20040135442A1 (en) | 2004-07-15 |
Family
ID=32681552
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/340,786 Expired - Fee Related US6762519B1 (en) | 2003-01-13 | 2003-01-13 | Outer rotor structure for an ac fan |
Country Status (1)
Country | Link |
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US (1) | US6762519B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070096585A1 (en) * | 2005-11-02 | 2007-05-03 | Kuen Yang Industrial Co., Ltd. | AC motor stator |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4130770A (en) * | 1974-02-26 | 1978-12-19 | Papst-Motoren Kg | Axial flow fan having improved axial length structure |
US4395815A (en) * | 1980-01-29 | 1983-08-02 | Card-O-Matic Pty. Limited | Method of making electric machines |
-
2003
- 2003-01-13 US US10/340,786 patent/US6762519B1/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4130770A (en) * | 1974-02-26 | 1978-12-19 | Papst-Motoren Kg | Axial flow fan having improved axial length structure |
US4395815A (en) * | 1980-01-29 | 1983-08-02 | Card-O-Matic Pty. Limited | Method of making electric machines |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070096585A1 (en) * | 2005-11-02 | 2007-05-03 | Kuen Yang Industrial Co., Ltd. | AC motor stator |
Also Published As
Publication number | Publication date |
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US6762519B1 (en) | 2004-07-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SUNONWEALTH ELECTRIC MACHINE INDUSTRY CO., LTD., T Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HORNG, ALEX;WU, WEN-SHING;REEL/FRAME:013661/0689 Effective date: 20030107 |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20120713 |