U.S. patent application number 12/830363 was filed with the patent office on 2011-01-27 for axial flow fan for external rotor.
This patent application is currently assigned to ZHONGSHAN BROAD-OCEAN MOTOR CO., LTD.. Invention is credited to Huasheng NING.
Application Number | 20110020121 12/830363 |
Document ID | / |
Family ID | 42544434 |
Filed Date | 2011-01-27 |
United States Patent
Application |
20110020121 |
Kind Code |
A1 |
NING; Huasheng |
January 27, 2011 |
AXIAL FLOW FAN FOR EXTERNAL ROTOR
Abstract
An axial flow fan for an external rotor, including at least: an
axial flow blade, a support comprising an annular cylinder and
multiple installation pins, and an external rotor motor comprising
an external rotor. The installation pins are extended from the
outside of the annular cylinder. The axial flow blade is disposed
on the installation pin. The annular cylinder is fit on the
external rotor of the external rotor motor. The flow fan features
simple and convenient assembling, reliable connection, high
production efficiency, low requirement for workers, and low
production cost.
Inventors: |
NING; Huasheng; (Zhongshan,
CN) |
Correspondence
Address: |
MATTHIAS SCHOLL
14781 MEMORIAL DRIVE, SUITE 1319
HOUSTON
TX
77079
US
|
Assignee: |
ZHONGSHAN BROAD-OCEAN MOTOR CO.,
LTD.
Zhongshan
CN
|
Family ID: |
42544434 |
Appl. No.: |
12/830363 |
Filed: |
July 5, 2010 |
Current U.S.
Class: |
416/60 ;
416/213A; 416/244R |
Current CPC
Class: |
F04D 29/34 20130101 |
Class at
Publication: |
416/60 ;
416/213.A; 416/244.R |
International
Class: |
F04D 29/34 20060101
F04D029/34; F04D 29/38 20060101 F04D029/38 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 27, 2009 |
CN |
200920061726.0 |
Claims
1. An axial flow fan for an external rotor, comprising an axial
flow blade; a support comprising an annular cylinder and multiple
installation pins; and an external rotor motor comprising an
external rotor; wherein said installation pins are extended from
the outside of said annular cylinder; said axial flow blade is
disposed on said installation pin; and said annular cylinder is fit
on said external rotor of said external rotor motor.
2. The axial flow fan of claim 1, wherein said annular cylinder is
formed by an annular body with an opening; and inner wall of said
annular cylinder is interference-fit with outer wall of said
external rotor.
3. The axial flow fan of claim 1, wherein a screw hole is disposed
on said installation pin.
4. The axial flow fan of claim 3, wherein said axial flow blade is
disposed on said installation pin via nuts and bolts.
5. The axial flow fan of claim 1, wherein a through hole is
disposed on said installation pin.
6. The axial flow fan of claim 5, wherein said axial flow blade is
disposed on said installation pin via riveting.
7. The axial flow fan of claim 1, wherein said axial flow blade is
disposed on said installation pin via welding.
8. The axial flow fan of claim 1, wherein said axial flow blade is
disposed on said installation pin via buckling.
9. The axial flow fan of claim 1, wherein said annular cylinder and
said installation pin are integrally formed.
10. The axial flow fan of claim 1, wherein said annular cylinder is
connected to said installation pin via welding, buckling, or
riveting.
11. An axial flow fan for an external rotor, comprising an axial
flow blade; a support comprising an annular cylinder and multiple
installation pins; an external rotor motor comprising an external
rotor; and an external convex ring; wherein said installation pins
are extended from the outside of said annular cylinder; said axial
flow blade is disposed on said installation pin; said annular
cylinder is fit on said external rotor of said external rotor
motor; and said external convex ring is disposed between said
annular cylinder and said installation pin.
12. The axial flow fan of claim 11, wherein said annular cylinder
is integrally formed; and inner wall of said annular cylinder is
interference-fit with outer wall of said external rotor.
13. The axial flow fan of claim 11, wherein a screw hole is
disposed on said installation pin.
14. The axial flow fan of claim 13, wherein said axial flow blade
is disposed on said installation pin via nuts and bolts.
15. The axial flow fan of claim 11, wherein a through hole is
disposed on said installation pin.
16. The axial flow fan of claim 15, wherein said axial flow blade
is disposed on said installation pin via riveting.
17. The axial flow fan of claim 11, wherein said axial flow blade
is disposed on said installation pin via welding.
18. The axial flow fan of claim 11, wherein said axial flow blade
is disposed on said installation pin via buckling.
19. The axial flow fan of claim 11, wherein said annular cylinder
and said installation pin are integrally formed.
20. The axial flow fan of claim 11, wherein said annular cylinder
is connected to said installation pin via welding, buckling, or
riveting.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] Pursuant to 35 U.S.C. .sctn.119 and the Paris Convention
Treaty, this application claims the benefit of Chinese Patent
Application No. 200920061726.0 filed on Jul. 27, 2009, the contents
of which are incorporated herein by reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The invention relates to an axial flow fan, and more
particularly to an axial flow fan for an external rotor.
[0004] 2. Description of the Related Art
[0005] A typical structure for a conventional axial flow fan for an
external rotor includes an air blade that is welded with external
surface of a housing of the external rotor. However, requirements
for a welding position and a welding direction of the air blade are
stringent, and a high-level welding technology is needed, which
cause high production cost and low production efficiency. A
different structure employs a groove disposed on an outer surface
of the housing, but installation of this axial flow fan is not
reliable.
SUMMARY OF THE INVENTION
[0006] In view of the above-described problem, it is one objective
of the invention to provide an axial flow fan for an external rotor
that features simple assembling, high production efficiency,
reliable connection, and low production cost.
[0007] To achieve the above objectives, in accordance with one
embodiment of the invention, provided is an axial flow fan for an
external rotor, comprising: an axial flow blade, a support
comprising an annular cylinder and multiple installation pins, and
an external rotor motor comprising an external rotor. The
installation pins are extended from the outside of the annular
cylinder, the axial flow blade is disposed on the installation pin,
and the annular cylinder is fit on the external rotor of the
external rotor motor.
[0008] In a class of this embodiment, the annular cylinder is
formed by an annular body with an opening, and inner wall of the
annular cylinder is interference-fit with outer wall of the
external rotor.
[0009] In a class of this embodiment, a screw hole is disposed on
the installation pin.
[0010] In a class of this embodiment, the axial flow blade is
disposed on the installation pin via nuts and bolts.
[0011] In a class of this embodiment, a through hole is disposed on
the installation pin.
[0012] In a class of this embodiment, the axial flow blade is
disposed on the installation pin via riveting.
[0013] In a class of this embodiment, the axial flow blade is
disposed on the installation pin via welding.
[0014] In a class of this embodiment, the axial flow blade is
disposed on the installation pin via buckling.
[0015] In a class of this embodiment, the annular cylinder and the
installation pin are integrally formed.
[0016] In a class of this embodiment, the annular cylinder is
connected to the installation pin via welding, buckling, or
riveting.
[0017] In accordance with another embodiment of the invention,
provided is an axial flow fan for an external rotor, comprising an
axial flow blade, a support comprising an annular cylinder and
multiple installation pins, an external rotor motor comprising an
external rotor, and an external convex ring. The installation pins
are extended from the outside of the annular cylinder, the axial
flow blade is disposed on the installation pin, the annular
cylinder is fit on the external rotor of the external rotor motor,
and the external convex ring is disposed between the annular
cylinder and the installation pin.
[0018] In a class of this embodiment, the annular cylinder is
integrally formed, and inner wall of the annular cylinder is
interference-fit with outer wall of the external rotor.
[0019] In a class of this embodiment, a screw hole is disposed on
the installation pin.
[0020] In a class of this embodiment, the axial flow blade is
disposed on the installation pin via nuts and bolts.
[0021] In a class of this embodiment, a through hole is disposed on
the installation pin.
[0022] In a class of this embodiment, the axial flow blade is
disposed on the installation pin via riveting.
[0023] In a class of this embodiment, the axial flow blade is
disposed on the installation pin via welding.
[0024] In a class of this embodiment, the axial flow blade is
disposed on the installation pin via buckling.
[0025] In a class of this embodiment, the annular cylinder and the
installation pin are integrally formed.
[0026] In a class of this embodiment, the annular cylinder is
connected to the installation pin via welding, buckling, or
riveting.
[0027] Advantages of the invention are as follows: 1) the annular
cylinder on the support is fit on the housing of the external rotor
of the external rotor motor, and the inner wall of the annular
cylinder is interference-fit with the outer wall of the external
rotor, which results in simple assembling, reliable connection,
high production efficiency, low requirement for workers, and low
production cost; and 2) the external convex ring disposed between
the annular cylinder and the installation pin is capable of
increasing radial dimension and ensuring stable force transfer.
BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Detailed description will be given below in conjunction with
accompanying drawings, in which:
[0029] FIG. 1 is a schematic view of an axial flow fan for an
external rotor of a first embodiment of the invention;
[0030] FIG. 2 is a cross-sectional view of FIG. 1 along a line
C-C;
[0031] FIG. 3 is a schematic view of an axial flow fan for an
external rotor of a second embodiment of the invention; and
[0032] FIG. 4 is a cross-sectional view of FIG. 3 along a line
D-D.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0033] As shown in FIGS. 1 and 2, an axial flow fan for an external
rotor of a first embodiment of the invention comprises an axial
flow blade 1, a support 2 comprising an annular cylinder 21 and
multiple installation pins 22, an external rotor motor 3 comprising
an external rotor 31 and an inner stator 32, and an external convex
ring 23.
[0034] The installation pins 22 are extended from the outside of
the annular cylinder 21.
[0035] The axial flow blade 1 is disposed on the installation pin
22.
[0036] The annular cylinder 21 is fit on the external rotor 31 of
the external rotor motor 3, and is integrally formed.
[0037] The external convex ring 23 is disposed between the annular
cylinder 21 and the installation pin 22, and operates to increase
radial dimension and to improve structural strength.
[0038] Inner wall of the annular cylinder 21 is interference-fit
with outer wall of the external rotor 31.
[0039] A screw hole is disposed on the installation pin 22, and the
axial flow blade 1 is disposed on the installation pin 22 via nuts
42 and bolts 41. Alternatively, a through hole is disposed on the
installation pin 22, and the axial flow blade 1 is disposed on the
installation pin 22 via riveting. Alternatively, the axial flow
blade 1 is disposed on the installation pin 22 via welding or
buckling.
[0040] The annular cylinder 21 and the installation pin 22 are
integrally formed, or connected to each other via welding,
buckling, or riveting.
[0041] As shown in FIGS. 3 and 4, an axial flow fan for an external
rotor of a second embodiment of the invention comprises an axial
flow blade 1, a support 2 comprising an annular cylinder 21 and
multiple installation pins 22, and an external rotor motor 3
comprising an external rotor 31 and an inner stator 32.
[0042] The installation pins 22 are extended from the outside of
the annular cylinder 21.
[0043] The axial flow blade 1 is disposed on the installation pin
22.
[0044] The annular cylinder 21 is fit on the external rotor 31 of
the external rotor motor 3, and is formed by an annular body with
an opening via a fastening device 5 or via welding.
[0045] Inner wall of the annular cylinder 21 is interference-fit
with outer wall of the external rotor 31.
[0046] A screw hole is disposed on the installation pin 22, and the
axial flow blade 1 is disposed on the installation pin 22 via nuts
42 and bolts 41. Alternatively, a through hole is disposed on the
installation pin 22, and the axial flow blade 1 is disposed on the
installation pin 22 via riveting. Alternatively, the axial flow
blade 1 is disposed on the installation pin 22 via welding or
buckling.
[0047] The annular cylinder 21 and the installation pin 22 are
integrally formed, or connected to each other via welding,
buckling, or riveting.
[0048] The invention features simple and convenient assembling,
reliable connection, high production efficiency, low requirement
for workers, and low production cost.
[0049] While particular embodiments of the invention have been
shown and described, it will be obvious to those skilled in the art
that changes and modifications may be made without departing from
the invention in its broader aspects, and therefore, the aim in the
appended claims is to cover all such changes and modifications as
fall within the true spirit and scope of the invention.
* * * * *