U.S. patent application number 11/396688 was filed with the patent office on 2007-10-04 for motor assembly structure.
Invention is credited to Hsi-Hung Liu.
Application Number | 20070231163 11/396688 |
Document ID | / |
Family ID | 38559202 |
Filed Date | 2007-10-04 |
United States Patent
Application |
20070231163 |
Kind Code |
A1 |
Liu; Hsi-Hung |
October 4, 2007 |
Motor assembly structure
Abstract
A motor assembly structure including a first bracket and a
second bracket which together form a coil unit. The first bracket
has a hub integrally extending from the first bracket into the
second bracket. The motor assembly structure further includes a
silicon steel plate unit fitted around the hub and sandwiched
between the first bracket and the second bracket. The first bracket
and the hub are integrally formed as a module so that the
assembling procedure of the motor assembly structure is
facilitated.
Inventors: |
Liu; Hsi-Hung; (Taichung
City, TW) |
Correspondence
Address: |
ROSENBERG, KLEIN & LEE
3458 ELLICOTT CENTER DRIVE-SUITE 101
ELLICOTT CITY
MD
21043
US
|
Family ID: |
38559202 |
Appl. No.: |
11/396688 |
Filed: |
April 4, 2006 |
Current U.S.
Class: |
417/354 |
Current CPC
Class: |
H02K 3/38 20130101; F04D
25/0613 20130101; H02K 5/163 20130101; H02K 1/187 20130101 |
Class at
Publication: |
417/354 |
International
Class: |
F04B 17/00 20060101
F04B017/00 |
Claims
1. A motor assembly structure comprising: a first bracket and a
second bracket arranged side by side, the first bracket having a
hub integrally extending from the first bracket to the second
bracket, the hub having a connecting end connected with the first
bracket, the connecting end being formed with an opening, the hub
further having a close end distal from the opening, the hub being
formed with a shaft cavity communicating with the opening; a
silicon steel plate unit fitted around the hub and sandwiched
between the first bracket and the second bracket; a circuit board
fitted around the hub and adjacent to the second bracket; a rotor
including an annular magnet arranged around the locator of the
motor, the rotor having a central shaft rotatably fitted in the
shaft cavity of the hub; and a base seat connected with the close
end of the hub.
2. The motor assembly structure as claimed in claim 1, wherein a
wall of the shaft cavity is formed with an annular protrusion
adjacent to the opening of the shaft cavity, an outer circumference
of the central shaft being formed with an annular groove
complementary to the annular protrusion, whereby the annular
protrusion of the shaft cavity is snugly inlaid in the annular
groove of the central shaft.
3. The motor assembly structure as claimed in claim 1, wherein a
magnet is embedded in the close end of the hub.
4. The motor assembly structure as claimed in claim 1, wherein the
rotor further includes several vanes.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention is related to a motor assembly
structure which can be easily assembled.
[0002] FIG. 4 shows a conventional locator assembly including a
bush 6, a coil unit 7 and a central shaft 8 drivingly connected
with the vanes. The bush 6 is fitted in the coil unit 7. A bearing
60 is mounted in the bush 6 and the central shaft 8 is fitted
through the bearing 60 as shown in FIG. 5. The vanes 81 are
connected with one end of the central shaft 8 distal from the bush
6. The coil unit 7 serves to drive the vanes 81 to rotate.
[0003] The assembly of the above components is complicated. First,
the bush 6 must be fixed with a base seat 62. Then the entire coil
unit 7 is fitted around the bush 6. Finally, the central shaft 8 is
coupled with the bush 6.
[0004] The above assembling procedure is quite time-consuming.
Moreover, the conventional locator assembly includes numerous
components so that the manufacturing cost is high. In addition, the
components must be precisely manufactured so that they can be
snugly adapted to each other. These components are mass-produced
and it is hard to precisely manufacture every components. In the
case that the size of some of the components fails to meet the
specification, the ratio of good products will be greatly
reduced.
SUMMARY OF THE INVENTION
[0005] It is therefore a primary object of the present invention to
provide a motor assembly structure including a first bracket and a
second bracket which together form a coil unit. The first bracket
has a hub integrally extending from the first bracket into the
second bracket. The first bracket itself integrally has a hub so
that an operator only needs to assemble the first and second
brackets to fix the silicon steel plate unit. Therefore, the number
of the components is reduced and the tolerance of the assembly of
the components is minified. Also, the assembling procedure of the
motor assembly structure is facilitated.
[0006] According to the above object, the motor assembly structure
of the present invention includes: a first bracket and a second
bracket arranged side by side, the first bracket having a hub
integrally extending from the first bracket to the second bracket,
the hub having a connecting end connected with the first bracket,
the connecting end being formed with an opening, the hub further
having a close end distal from the opening, the hub being formed
with a shaft cavity communicating with the opening; a silicon steel
plate unit fitted around the hub and sandwiched between the first
bracket and the second bracket; a circuit board fitted around the
hub and adjacent to the second bracket; a rotor including an
annular magnet arranged around the locator of the motor, the rotor
having a central shaft rotatably fitted in the shaft cavity of the
hub; and a base seat connected with the close end of the hub.
[0007] The present invention can be best understood through the
following description and accompanying drawings wherein:
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is a perspective exploded view of the locator
assembly of the present invention;
[0009] FIG. 2 is a perspective exploded view of the fan of the
present invention;
[0010] FIG. 3 is a sectional assembled view of the motor assembly
structure of the present invention;
[0011] FIG. 4 is a perspective exploded view of a conventional
locator assembly of a motor; and
[0012] FIG. 5 is a sectional assembled view of the conventional
motor assembly structure.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0013] Please refer to FIGS. 1 to 3. The motor assembly structure
of the present invention includes a first bracket 1, a silicon
steel plate unit 2, a second bracket 3, a rotor 4 and a base seat
5.
[0014] The first bracket 1 has a hub 11 integrally extending from
the first bracket 1 to the second bracket 3. The hub 11 has an
opening 12 formed on a top face of the first bracket 1. The hub 11
has a connecting end 10 connected with the first bracket 1 and a
close end 13 distal from the opening 12. The hub 11 is formed with
a shaft cavity 14 communicating with the opening 12. In this
embodiment, a magnet 131 is embedded in the close end 13 for
attracting a central shaft 41 of the rotor 4 and keeping the
central shaft 41 in a central position.
[0015] The silicon steel plate unit 2 is fitted around the hub 11
of the first bracket 1. In this embodiment, the silicon steel plate
unit 2 is composed of multiple silicon steel plates which are piled
up.
[0016] The silicon steel plate unit 2 is sandwiched between the
first bracket 1 and the second bracket 3. The first bracket 1 is
formed with several connecting holes 15 at intervals, while the
second bracket 3 is formed with several connecting holes 31 at
intervals corresponding to the connecting holes 15. Several
insertion pins 150 are fitted through the connecting holes 15, 31
to fixedly connect the silicon steel plate unit 2 with the first
bracket 1 and the second bracket 3. A coil 32 is then wound around
the first bracket 1, the silicon steel plate unit 2 and the second
bracket 3.
[0017] A circuit board 16 is fitted around the close end 13 of the
hub 11 and adjacent to the second bracket 3. The circuit board 16
is also fixed with the insertion pins 150, whereby the first
bracket 1, the silicon steel plate unit 2, the second bracket 3 and
the circuit board 16 together form a locator assembly (not denoted)
of the motor.
[0018] Referring to FIGS. 2 and 3, in this embodiment, the rotor 4
includes several vanes 42 and an annular magnet 40 arranged around
the locator of the motor. The central shaft 41 of the rotor 4 is
rotatably fitted in the shaft cavity 14 of the hub 11. A wall of
the shaft cavity 14 is formed with an annular protrusion 141
immediately adjacent to the opening 12 of the shaft cavity 14. The
outer circumference of the central shaft 41 is formed with an
annular groove 411 complementary to the annular protrusion 141. The
annular protrusion 141 of the shaft cavity 14 is snugly inlaid in
the annular groove 411 of the central shaft 41.
[0019] When assembled, the insertion pins 150 are fitted through
the first bracket 1, the silicon steel plate unit 2 and the second
bracket 3 to fix the silicon steel plate unit 2 around the hub 11.
Such procedure is easy.
[0020] The coil 32 is then wound around the first bracket 1, the
silicon steel plate unit 2 and the second bracket 3. The first
bracket 1, the silicon steel plate unit 2, the second bracket 3 and
the circuit board 16 together form a locator assembly. The shaft
cavity 14 of the hub 11 serves as a self-lubricating bearing in
which the central shaft 41 can be rotated.
[0021] The base seat 5 has a connecting socket 51 in which the
close end 13 of the hub 11 is fixedly plugged. According to the
above arrangement, the present invention has the following
advantages: [0022] 1. The first bracket and the hub are integrally
formed as a module which can be easily assembled. [0023] 2. The
first bracket of the locator assembly itself has a hub so that the
number of the components is reduced to lower the manufacturing
cost. In addition, the tolerance of the assembly of the components
is minified so that the quality of the product can be enhanced.
[0024] 3. The first bracket and the hub are integrally formed so
that the locator assembly has stable quality and prolonged using
life. [0025] 4. The labor for assembling the components is reduced
and the components can be automatically mass-produced. Therefore,
the production capacity is greatly promoted and the cost for the
labor is reduced. [0026] 5. The integrated structure has stronger
structural strength so that the motor assembly structure is not
subject to damage of external force.
[0027] The above embodiments are only used to illustrate the
present invention, not intended to limit the scope thereof. Many
modifications of the above embodiments can be made without
departing from the spirit of the present invention.
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