U.S. patent application number 11/333148 was filed with the patent office on 2007-07-19 for multi-fan assembly with an oscillating structure.
Invention is credited to Robin Fan.
Application Number | 20070166167 11/333148 |
Document ID | / |
Family ID | 38263353 |
Filed Date | 2007-07-19 |
United States Patent
Application |
20070166167 |
Kind Code |
A1 |
Fan; Robin |
July 19, 2007 |
Multi-fan assembly with an oscillating structure
Abstract
The present invention relates to a multi-fan assembly with an
oscillating structure comprising a base body, a mounting seat, a
differential mechanism, an oscillating link system, and a down rod.
When the differential mechanism rotates the oscillating system, the
base body of the multi-fan assembly and the mounting seat will be
caused to oscillate limitedly, so that the airflow rate can be
effectively controlled through the self-rotation and the
revolutionary oscillation of the member fans.
Inventors: |
Fan; Robin; (Tan-Zi Hsiang,
TW) |
Correspondence
Address: |
CHARLES E. BAXLEY, ESQ.
90 JOHN STREET
THIRD FLOOR
NEW YORK
NY
10038
US
|
Family ID: |
38263353 |
Appl. No.: |
11/333148 |
Filed: |
January 17, 2006 |
Current U.S.
Class: |
416/244R |
Current CPC
Class: |
F04D 25/105 20130101;
F04D 25/088 20130101 |
Class at
Publication: |
416/244.00R |
International
Class: |
F04D 29/00 20060101
F04D029/00 |
Claims
1. A multi-fan assembly with an oscillating structure comprising: a
base body provided on its periphery with a plurality of oscillating
member fans; a mounting seat assembled on the base body, and a
plurality of bearing holes defined on the mounting seat; a
differential mechanism disposed in the mounting seat and including
a pivoted axle inserted in one of the bearing holes of the mounting
seat and a central spindle inserted another one of the bearing
holes; an oscillating link system pivotally disposed on the
mounting seat and controlled by the pivoted axle of the
differential mechanism; and a down rod having an end fixed to a
ceiling and another end fixed to the central spindle of the
differential mechanism.
2. The multi-fan assembly with an oscillating structure as claimed
in claim 1, wherein the differential mechanism includes a
positioning disc, a positioning seat, a gear set and a motor, the
gear set is disposed between the positioning seat and the
positioning disc, and the positioning is locked in the mounting
seat.
3. The multi-fan assembly with an oscillating structure as claimed
in claim 1, wherein the differential mechanism is of multi-spindle
type.
4. The multi-fan assembly with an oscillating structure as claimed
in claim 1, wherein the differential mechanism is of double-spindle
type.
5. The multi-fan assembly with an oscillating structure as claimed
in claim 1, wherein the differential mechanism is of planetary
type.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a multi-fan assembly, and
more particularly to a multi-fan assembly with an oscillating
structure that can enable the member fans to oscillate around the
central spindle while rotating around their own axles.
[0003] 2. Description of the Prior Arts
[0004] To avoid confusion during the course of this presentation,
here are definitions for some words used in following descriptions
as below:
[0005] Rotation: the spinning of fan blades of the member fan
rounds its own axis or the circular movement of a rotatable member
moving round a central shaft.
[0006] Revolution: the circular movement of two or more member fans
revolving about a common central spindle.
[0007] A conventional multi-fan assembly generally comprises a base
body and two member fans, the base body is attached to a ceiling by
a main shaft, on a main shaft is rotatably disposed a rotary
assembly that is contained in the base body and is provided a
conductive unit, and then the member fans are fixed at the outside
of the rotary assembly by a crossbar assembly. The conductive unit
provides power for the member fans so as to make them rotate. When
the member fans rotate in the same direction, it will produce a
torque on the rotary assembly, thus bringing on a revolution of the
member fans. For prevention of an overly large torque produced at
high-speed rotation of the member fans since it will result in an
overly high revolution speed of the member fans, a brake gear set
is provided on the rotary assembly and is engaged with a brake gear
on the main shaft, thus creating a revolution load for controlling
the revolution speed. However, there are still some disadvantages
that need to be improved:
[0008] Since the friction resistance between the brake gears is
fixed and doesn't change with the rotation speed of the member
fans, when the rotation speed increases, the torque produced will
also be increased. Once the torque goes beyond the set value, the
revolution speed of the member fans will increase constantly, and
at this moment, the member fans will keep revolving for a certain
even if the power is turned off. When this happens, the user might
mistakenly think that it may be due to the poor design or the
quality is not good.
[0009] The present invention has arisen to mitigate and/or obviate
the afore-described disadvantages.
SUMMARY OF THE INVENTION
[0010] The primary objective of the present invention is to provide
a multi-fan assembly with an oscillating structure that can enable
the member fans to oscillate around the central spindle while
rotating around their own axles, so that the airflow rate can be
effectively controlled through the self-rotation and the
revolutionary oscillation of the member fans.
[0011] The present invention will become more obvious from the
following description when taken in connection with the
accompanying drawings, which show, for purpose of illustrations
only, the preferred embodiment in accordance with the present
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] FIG. 1 is an exploded view of a multi-fan assembly with an
oscillating structure in accordance with the present invention;
[0013] FIG. 2 is an exploded view of a part of a multi-fan assembly
with an oscillating structure in accordance with the present
invention;
[0014] FIG. 3 is an assembly view of the multi-fan assembly with an
oscillating structure in accordance with the present invention;
[0015] FIG. 4 is a perspective view of a part of a multi-fan
assembly with an oscillating structure in accordance with the
present invention;
[0016] FIG. 5 shows the multi-fan assembly in accordance with the
present invention before oscillation;
[0017] FIG. 6 shows the multi-fan assembly in accordance with the
present invention after oscillation.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0018] Referring to FIGS. 1-3, a multi-fan assembly with an
oscillating structure in accordance with the present invention is
shown and comprises a base body 20, a mounting seat 30, a
differential mechanism 40, an oscillating link system 50, and a
down rod 60.
[0019] The base body 20 is provided on its periphery with three
oscillating member fans 21.
[0020] The mounting seat 30 is locked with the base body 20, and on
the mounting seat 30 are defined a plurality of bearing holes 31,
32.
[0021] The differential mechanism 40 is of multi-spindle type for
example, which is received in the mounting seat 30 and includes a
positioning disc 41, a positioning seat 42, a gear set 43 and a
motor 44. The gear set 43 is disposed between the positioning seat
42 and the positioning disc 41. The positioning seat 42 is locked
in the mounting seat 30. A gear 431 of the gear set 43 includes a
pivoted axle 432 inserted in one of the bearing holes 32 of the
mounting seat 30. The motor 44 includes a central spindle 441
inserted in the bearing hole 31 of the mounting seat 30. Besides, a
gear 433 is fixed on the motor 44 and then mounted on the central
spindle 441.
[0022] The oscillating link system 50 is pivotally disposed on the
mounting seat 30 and controlled by the pivoted axle 432 of the
differential mechanism 40. The oscillating link system 50 comprises
a positioning arm 51, a crank 52 and a rotary arm 53 that are
pivotally connected together through a bearing 54. The positioning
arm 51 is pivotally mounted on the central spindle 441, and the
rotary arm 53 is locked to the pivoted axle 432 of the differential
mechanism 40.
[0023] The down rod 60, an end of which is fixed to the ceiling
while another end of the same is fixed to the central spindle 441
of the differential mechanism 40.
[0024] For a better understanding of the present invention, its
operation and function, references should be made to FIGS. 4-6.
When the motor 44 rotates (the central spindle 441 doesn't rotate),
the gear 433 fixed on the motor 44 will drive the gear set 43 to
rotate, meanwhile, the pivoted axle 432 of the gear 431 will be
caused to rotate, consequently, the rotary arm 53 will rotate
synchronously as a result of the rotation of the pivoted axle
432.
[0025] Due to the rotary arm 53, the crank 52 and the positioning
arm 51 are pivotally connected with one another, plus the
positioning arm 51 is pivotally mounted on the central spindle 441
and the rotary arm 53 is positioned on pivoted axle 432, so that
when the pivoted axle 432 rotates the rotary arm 53, the crank arm
52 and the positioning arm 51 will be caused to oscillate limitedly
around the central spindle 441. During the oscillation of the crank
arm 52 and the positioning arm 51, the pivoted axle 432 will drive
the mounting seat 30 to oscillate. Since the mounting seat 30 is
locked with the base body 20, the base body 20 will be caused to
oscillate limitedly as a result of the oscillation of the mounting
seat 30 (this is the revolutionary oscillation of the multi-fan
assembly). Therefore, airflow rate can be effectively controlled
through the self-rotation and the revolutionary oscillation of the
member fans.
[0026] It is to be noted that the differential mechanism in this
embodiment is not limited to the multi-spindle type, it also can be
of other types, including double-spindle type or planetary
type.
[0027] While we have shown and described various embodiments in
accordance with the present invention, it should be clear to those
skilled in the art that further embodiments may be made without
departing from the scope of the present invention.
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