U.S. patent application number 13/331669 was filed with the patent office on 2013-06-20 for rotation control device of multi-rotor ceiling fan.
The applicant listed for this patent is Cliff WANG. Invention is credited to Cliff WANG.
Application Number | 20130156582 13/331669 |
Document ID | / |
Family ID | 48610317 |
Filed Date | 2013-06-20 |
United States Patent
Application |
20130156582 |
Kind Code |
A1 |
WANG; Cliff |
June 20, 2013 |
ROTATION CONTROL DEVICE OF MULTI-ROTOR CEILING FAN
Abstract
A rotation control device of a multi-rotor ceiling fan includes
a fixed unit. The fixed unit is provided with a fixed gear. The
fixed unit is pivotally connected with a movable unit. A driving
member is fixed to the movable unit. The driving member has a
driving gear. The driving gear meshes with the fixed gear. The
driving member is provided with at least one pair of support rods.
The distal ends of the support rods are respectively connected with
a fan. The driving member brings the movable unit to turn at a
constant speed relative to the fixed unit for the fans to revolve
round the fixed unit, producing stable airflow to the surrounding
by 360-degree rotation.
Inventors: |
WANG; Cliff; (Taichung,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
WANG; Cliff |
Taichung |
|
TW |
|
|
Family ID: |
48610317 |
Appl. No.: |
13/331669 |
Filed: |
December 20, 2011 |
Current U.S.
Class: |
416/170R |
Current CPC
Class: |
F04D 25/088 20130101;
F04D 25/105 20130101 |
Class at
Publication: |
416/170.R |
International
Class: |
F04D 19/00 20060101
F04D019/00; F04D 27/00 20060101 F04D027/00 |
Claims
1. A rotation control device of a multi-rotor ceiling fan,
comprising: a fixed unit having a housing, the housing having an
accommodation room and an opening at one side thereof, the housing
further having an axial hole at another side thereof, the fixed
unit comprising a shaft connected to the axial hole, the shaft
being provided with a power supply portion; a fixed gear fixed to
the fixed unit, the fixed gear having a fixed toothed portion which
is disposed round the shaft; a movable unit comprising a seat
member which is pivotally connected to the shaft, the movable unit
comprising at least one pair of support rods extending outward from
the seat member and disposed relative to the shaft, distal ends of
the support rods being respectively connected with a fan, the seat
member of the movable unit being provided with a load portion, the
load portion getting contact with the power supply portion; and a
driving member fixed to the movable unit and having a motor, the
motor being electrically connected to the load portion, the motor
being further connected with a driving gear, the driving gear
having a driving toothed portion, the driving toothed portion
meshing with the fixed toothed portion.
2. The rotation control device of a multi-rotor ceiling fan as
claimed in claim 1, wherein the fixed gear is an annular member,
the annular member having an outer annular surface and an opposing
inner annular surface, the outer annular surface of the annular
member being fixed to the opening of the housing, the inner annular
surface having the fixed toothed portion thereon.
3. The rotation control device of a multi-rotor ceiling fan as
claimed in claim 1, wherein the fixed gear is a disc member, the
disc member having a through hole at a central portion thereof for
connection of the shaft, the disc member being fixed to the shaft,
the disc member having the fixed toothed portion around an outer
wall thereof.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a rotation control device
of a multi-rotor ceiling fan.
[0003] 2. Description of the Prior Art
[0004] FIG. 1 is a side view of a conventional multi-rotor ceiling
fan. The conventional multi-rotor ceiling fan comprises a shaft 1.
One end of the shaft 1 is pivotally connected with a seat member 2.
The other end of the shaft 1 is fixed to the ceiling (not shown in
the drawing). The shaft 1 is provided with a power supply portion 3
which is located close to the seat member 2. The seat member 2 is
provided with a corresponding load portion 4. The load portion 4
gets contact with the power supply portion 3. The seat member 2 is
provided with a pair of support rods 5 extending outward. The
distal ends of the support rods 5 are respectively connected with a
fan 6. The fans 6 are electrically connected to the load portion 4.
When the multi-rotor ceiling fan is started, the power supply
portion 3 will supply power to the load portion 4. The load portion
4 further transmits the power supply to the fans 6, such that the
fans 6 are rotated. By the inertia force generated by rotation of
the fans 6, the fans 6 also revolve round the seat member 2,
producing airflow to the surrounding by 360-degree rotation.
[0005] However, because the fans 6 revolve round the seat member 2
by the inertia force generated by rotation of the fans, the
revolution speed of the fans 6 will be influenced by the rotation
speed of the fans 6. That is to say, the higher the rotation speed,
the higher revolution speed there will be. That results in that the
conventional multi-rotor ceiling fan cannot produce stable airflow
to the surrounding by 360-degree rotation. Accordingly, the
inventor of the present invention has devoted himself based on his
many years of practical experiences to solve these problems.
SUMMARY OF THE INVENTION
[0006] The primary object of the present invention is to provide a
rotation control device of a multi-rotor ceiling fan to produce
stable airflow to the surrounding by 360-degree rotation.
[0007] In order to achieve the aforesaid object, the rotation
control device of a multi-rotor ceiling fan of the present
invention comprises a fixed unit, a fixed gear, a movable unit, and
a driving member. The fixed unit has a housing. The housing has an
accommodation room and an opening at one side thereof. The housing
further has an axial hole at another side thereof. The fixed unit
comprises a shaft connected to the axial hole. The shaft is
provided with a power supply portion. The fixed gear is fixed to
the fixed unit. The fixed gear has a fixed toothed portion which is
disposed round the shaft. The movable unit comprises a seat member
which is pivotally connected to the shaft. The movable unit
comprises at least one pair of support rods extending outward from
the seat member and disposed relative to the shaft. The distal ends
of the support rods are respectively connected with a fan. The seat
member of the movable unit is provided with a load portion. The
load portion gets contact with the power supply portion. The
driving member is fixed to the movable unit and has a motor. The
motor is electrically connected to the load portion. The motor is
further connected with a driving gear. The driving gear has a
driving toothed portion. The driving toothed portion meshes with
the fixed toothed portion.
[0008] The driving member is fixed to the seat member, the seat
member is pivotally connected to the shaft, and the fixed gear is
fixed to the shaft and not free. When the multi-rotor ceiling fan
is started, the driving gear is moved along the inner edge of the
fixed gear and synchronously brings the seat member to rotate with
the shaft as the center shaft. Thus, the movable unit turns at a
constant speed relative to the fixed unit for the fans connected to
the support rods to revolve round the fixed unit, producing stable
airflow to the surrounding by 360-degree rotation.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] FIG. 1 is a side view of a conventional multi-rotor ceiling
fan;
[0010] FIG. 2 is a perspective view according to a first embodiment
of the present invention;
[0011] FIG. 3 is a sectional view according to the first embodiment
of the present invention;
[0012] FIG. 4 is a schematic view showing operation of the first
embodiment of the present invention;
[0013] FIG. 5 is a perspective view according to a second
embodiment of the present invention; and
[0014] FIG. 6 is a sectional view according to the second
embodiment of the present invention.
[0015] FIG. 7 is a schematic view showing operation of the second
embodiment of the present invention;
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0016] Embodiments of the present invention will now be described,
by way of example only, with reference to the accompanying
drawings.
[0017] As shown in FIG. 2 and FIG. 3, the rotation control device
100 of a multi-rotor ceiling fan according to a first embodiment of
the present invention comprises a fixed unit 10, a fixed gear 20, a
movable unit 30, and a driving member 40.
[0018] The fixed unit 10 has a housing 11. The housing 11 has an
accommodation room 111 and an opening 112 at one side thereof. The
housing 11 further has an axial hole 113 at another side thereof.
The fixed unit 10 comprises a shaft 12 connected to the axial hole
113. The shaft 12 is provided with a power supply portion 13.
[0019] The fixed gear 20 is an annular member 21 which is fixed to
the fixed unit 10. The fixed gear 20 has a fixed toothed portion 22
which is disposed round the shaft 12. In this embodiment, the
annular member 21 has an outer annular surface 211 and an opposing
inner annular surface 212. The outer annular surface 211 is fixed
to the opening 112 of the housing 11. The inner annular surface 212
has the fixed toothed portion 22 thereon.
[0020] The movable unit 30 comprises a seat member 31 which is
pivotally connected to the shaft 12. The seat member 31 has a lower
seat 311 which is pivotally connected to the shaft 12 and an upper
seat 312 which is located above the lower seat 311. The movable
unit 30 comprises at least one pair of support rods 32 extending
outward from the lower seat 311 of the seat member 31 and disposed
relative to the shaft 12. The distal ends of the support rods 32
are respectively connected with a fan (not shown in the drawings).
The upper seat 312 of the seat member 31 of the movable unit 30 is
provided with a load portion 33. The load portion 33 gets contact
with the power supply portion 13.
[0021] The driving member 40 is fixed to the lower seat 311 of the
movable unit 30 and has a motor 41. The motor 41 is electrically
connected to the load portion 33. The motor 41 is further connected
with a driving gear 42. The driving gear 42 has a driving toothed
portion 421. The driving toothed portion 421 meshes with the fixed
toothed portion 22.
[0022] FIG. 4 is a schematic view showing operation of the first
embodiment of the present invention. When the multi-rotor ceiling
fan is started, the power supply portion 13 will supply power to
the load portion 33. The load portion 33 further transmits the
power supply to the motor 41, such that the motor 41 runs to drive
the driving gear 42 to turn. Because the driving member 40 is fixed
to the seat member 31 and the seat member 31 is pivotally connected
to the shaft 12 and the fixed gear 20 is fixed to the shaft 12 and
not free, the driving gear 42 is moved along the inner edge of the
fixed gear 20 as shown in FIG. 4 and synchronously brings the seat
member 31 to rotate with the shaft 12 as the center shaft. Thus,
the movable unit 30 turns at a constant speed relative to the fixed
unit 10 for the fans connected to the support rods 32 to revolve
round the fixed unit 10, producing stable airflow to the
surrounding by 360-degree rotation.
[0023] It is noted that the fixed toothed portion 22 of the fixed
gear 20 meshes with the driving toothed portion 421 of the driving
gear 42 to resist the inertia force generated by rotation of the
fans. Therefore, the movable unit 30 can be turned steady relative
to the fixed unit 10 by the driving member 40, not influenced by
the rotation speed of the fans.
[0024] FIG. 5 is a perspective view according to a second
embodiment of the present invention. FIG. 6 is a sectional view
according to the second embodiment of the present invention. The
rotation control device 100 of the multi-rotor ceiling fan of the
second embodiment is substantially similar to the first embodiment
with the exceptions described hereinafter. The fixed gear 20 is a
disc member 23. The disc member 23 has a through hole 231 at a
central portion thereof for connection of the shaft 12. The disc
member 23 is fixed to the shaft 12 and located between the lower
seat 311 and the upper seat 312. The disc member 23 has the fixed
toothed portion 22 around an outer wall thereof. The fixed toothed
portion 22 meshes with the driving portion 421 of the driving
member 40. The fixed gear 20 is fixed to the shaft 12 and not free.
When the multi-rotor ceiling fan is started, the driving gear 42 is
moved along the inner edge of the fixed gear 20 as shown in FIG. 7
and synchronously brings the seat member 31 to rotate with the
shaft 12 as the center shaft. Thus, the movable unit 30 turns at a
constant speed relative to the fixed unit 10 for the fans connected
to the support rods 32 to revolve round the fixed unit 10,
producing stable airflow to the surrounding by 360-degree rotation.
The second embodiment achieves the same effect as the first
embodiment.
[0025] Although particular embodiments of the present invention
have been described in detail for purposes of illustration, various
modifications and enhancements may be made without departing from
the spirit and scope of the present invention. Accordingly, the
present invention is not to be limited except as by the appended
claims.
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