U.S. patent application number 10/437145 was filed with the patent office on 2004-06-24 for fastening structure for securing stator of motor.
Invention is credited to Chang, Shun-Chen, Huang, Wen-Shi, Lin, Kuo-Cheng.
Application Number | 20040119348 10/437145 |
Document ID | / |
Family ID | 32503797 |
Filed Date | 2004-06-24 |
United States Patent
Application |
20040119348 |
Kind Code |
A1 |
Chang, Shun-Chen ; et
al. |
June 24, 2004 |
FASTENING STRUCTURE FOR SECURING STATOR OF MOTOR
Abstract
A fastening structure for securing a stator of a motor includes
a cooper sleeve with a notch thereon and a fastener. The fastener
is composed of a position section and a hook section, wherein the
hook section engages with the notch and the position section press
on the top surfaces of the coil bobbin of the stator.
Inventors: |
Chang, Shun-Chen; (Taipei,
TW) ; Lin, Kuo-Cheng; (Taoyuan City, TW) ;
Huang, Wen-Shi; (Jungli City, TW) |
Correspondence
Address: |
PRO-TECHTOR INTERNATIONAL
20775 Norada Court
Saratoga
CA
95070-3018
US
|
Family ID: |
32503797 |
Appl. No.: |
10/437145 |
Filed: |
May 12, 2003 |
Current U.S.
Class: |
310/66 |
Current CPC
Class: |
H02K 1/187 20130101 |
Class at
Publication: |
310/066 |
International
Class: |
H02K 007/00 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 18, 2002 |
TW |
91220620 |
Claims
What is claimed is:
1. A fastening structure for securing a stator of a motor,
comprising: a cooper sleeve having a notch; and a fastener having a
position section and a hook section, the hook section being
inserted into the notch, and the position section pressing against
the top surface of the stator.
2. The fastening structure according to claim 1, wherein the side
of the position section pressing against the stator extends to
cover the coil of the stator.
3. The fastening structure according to claim 1, wherein the
position section of the fastener presses against the cooper
sleeve.
4. The fastening structure according to claim 1, wherein the
fastener has a circular shape.
5. The fastening structure according to claim 1, wherein the
fastener is in the shape of an arc.
6. The fastening structure according to claim 1, wherein the
fastener is a combination of a plurality of arc structures having
the same center and radius.
7. The fastening structure according to claim 1, wherein the
position section of the fastener has a circular shape and the hook
section thereof is composed of a plurality of arc structures having
the same center and radius.
8. The fastening structure according to claim 1, wherein the
fastener is integrally formed by molding.
9. A fastening structure for securing a stator of a motor, the
stator having a coil bobbin, the fastening structure comprising: a
cooper sleeve having a notch formed laterally and inwardly on the
side surface of the cooper sleeve, the notch keeping a specific
distance from the top surface of the cooper sleeve; and a fastener
having a position section and a hook section, the hook section
being inserted into the notch, and the position section pressing
against the top surface of the stator.
10. The fastening structure according to claim 9, wherein the
fastener has a circular shape.
11. The fastening structure according to claim 9, wherein the
fastener is in the shape of an arc.
12. The fastening structure according to claim 9, wherein the
fastener is a combination of a plurality of arc structures having
the same center and radius.
13. The fastening structure according to claim 9, wherein the
position section of the fastener presses against the cooper
sleeve.
14. The fastening structure according to claim 9, wherein the
fastener is integrally formed by molding.
15. A fastening structure for securing a stator of a motor, the
stator having a silicon steel sheet to secure a coil of the motor,
the fastening structure comprising: a cooper sleeve having a first
notch and a second notch formed inwardly at the bottom of the first
notch, the first notch and second notch together forming an
L-shaped notch; and a fastener having a position section and a hook
section, the hook section being inserted into the L-shaped notch,
and the position section pressing against the top surface of the
silicon steel sheet.
16. The fastening structure according to claim 15, wherein the
fastener has a circular shape.
17. The fastening structure according to claim 15, wherein the
fastener in the shape of an arc.
18. The fastening structure according to claim 15, wherein the
fastener is a combination of a plurality of arc structures having
the same center and radius.
19. The fastening structure according to claim 15, wherein the
position section of the fastener presses against the cooper
sleeve.
20. The fastening structure according to claim 15, wherein the
fastener is integrally formed by molding.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The invention relates to a fastening structure for the
stator of a motor and, in particular, to a fastening structure for
the stator of a motor, which can prevent the stator from falling
off by means of a fastener.
[0003] 2. Description of the Related Art
[0004] The stator of a motor is liable to fall off if the assembly
strength of the motor is not high enough to withstand the
continuous vibration during a long period of operation. In view of
this, if one can provide a fastening structure compatible with
conventional parts of a motor, the assembly strength of the motor
can be enhanced significantly at low cost.
SUMMARY OF THE INVENTION
[0005] In view of the above, an objective of the invention is to
provide a fastening structure for securing the stator of a motor,
which enhances the assembly strength of a motor by a fastener
engaging with a cooper sleeve and thus the stator can be tightly
secured to the motor during operation.
[0006] Another objective of the invention is to provide a fastening
structure for securing the stator of a motor, which can protect the
coil by a special design of a fastener.
[0007] According to an embodiment of the invention, a fastener
includes a position section and a hook section. The two sides of
the position section of the fastener are designed to respectively
touch the cooper sleeve and the top surface of the coil bobbin. The
cooper sleeve is machined inwardly on its side surface to form a
notch at a specific distance from the top surface of the cooper
sleeve, which is designed to be substantially the same with the
distance from the position section to the end surface of the hook
section. Therefore, when the hook section is inserted into the
notch, the two sides of the position section tightly press against
the cooper sleeve and the top surface of the coil bobbin so as to
enhance the assembly strength and establish a firm connection.
[0008] According to another embodiment of the invention, one side
of the position section adjacent to the coil bobbin is extended to
the extent that it can cover the whole coil of the stator, which
prevents the friction between the coil and the rotor so as to
protect the coil.
[0009] According to still another embodiment of the invention, a
first notch is formed on the cooper sleeve, and a second notch is
formed inwardly at the bottom of the first notch. The first notch
and second notch together form an L-shaped notch to accommodate the
hook section of the fastener. When the hook section inserts into
the L-shaped notch of the cooper sleeve, the two sides of the
position section press tightly against the cooper sleeve and a top
surface of the silicon steel sheet covering the coil to secure the
stator of the motor.
[0010] Furthermore, the fastener may be of a circular structure, an
arc structure or a combination of a plurality of arc structures
having the same center and radius.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1 is a perspective cross sectional view showing a
fastener 10 of the fastening structure according to an embodiment
of the invention.
[0012] FIG. 2 is a sectional view showing the connection of the
fastener 10 and components of a motor 1 according to an embodiment
of the invention.
[0013] FIG. 3 is an enlarged cross-section M of the fastener 10
shown in FIG. 2, which illustrates more clearly the design of the
fastening structure according to the embodiment of the
invention.
[0014] FIG. 4 is a sectional view showing the connection of the
fastener 20 and the components of the motor 1 according to another
embodiment of the invention.
[0015] FIG. 5 is an enlarged cross-section N of the fastener 20
shown in FIG. 4.
[0016] FIG. 6 is a sectional view showing another motor 2, with the
arrangement of components different from that of the motor 1,
incorporating the fastener structure of the invention.
[0017] FIG. 7 is an enlarged cross-section O of the fastener 30
shown in FIG. 6.
[0018] FIG. 8 is a perspective cross sectional view showing a
fastener according to still another embodiment of the
invention.
[0019] FIG. 9 is a perspective view showing another modification of
the fastener structure according to the invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0020] The fastening structure for securing the stator of a motor
according to an embodiment of the invention will be described
hereinbelow with reference to the accompanying drawings, wherein
the same reference numbers refer to the same components.
[0021] FIG. 1 is a perspective cross sectional view showing a
fastener 10 of the fastening structure according to an embodiment
of the invention. As shown in FIG. 1, the fastener 10 with a
circular shape is composed of a position section 10A and a hook
section 10B, which are integrally formed by molding. Each of the
two sides of the position section 10A has a particular thickness
that depends on which component of the motor is to be assembled
with. The hook section 10B has an end surface P, and the distance h
from the position section 10A to the end surface P of the hook
section 10B is as indicated in FIG. 1.
[0022] FIG. 2 is a sectional view showing the connection of the
fastener 10 and components of a motor 1 according to an embodiment
of the invention. FIG. 3 is an enlarged cross-section M of the
fastener 10 shown in FIG. 2, which illustrates more clearly the
design of the fastening structure according to the embodiment of
the invention.
[0023] As shown in FIG. 2, the stator 16 of the motor 1 includes a
coil bobbin 14 and a coil 18. In this embodiment, the two sides of
the fastener 10 connect the cooper sleeve 12 of the motor and the
coil bobbin 14 of the stator 16, respectively. More specific, the
two sides of the position section 10A of the fastener 10 are
designed to respectively touch the cooper sleeve 12 and the top
surface of the coil bobbin 14 as shown in FIG. 3. The cooper sleeve
12 is machined inwardly on its side surface to form a notch 12A at
a distance t from its top surface, the distance t is designed to be
substantially the same as the distance h from the position section
10A to the end surface P. Therefore, when the hook section 10B is
inserted into the notch 12A, the two sides of the position section
10A tightly press against the cooper sleeve 12 and the top surface
of the coil bobbin 14 so as to establish a firm connection.
[0024] The vibration during the operation of the motor may cause
the stator 16 to fall off due to an upward force acting thereon.
Therefore, the fastening structure of this embodiment can solve the
problem in the most effective way. By inserting the end surface P
of the hook portion 10B into the notch 12B, the resulting force
with which the position section 10A presses against the coil bobbin
14 counteracts the upward force that acts on the stator 16 at point
Q during vibration. Therefore, the assembly strength can be
enhanced significantly, and the stator 16 can thus be tightly
secured to the motor.
[0025] FIG. 4 is a sectional view showing the connection of the
fastener 20 and the components of the motor 1 according to another
embodiment of the invention. FIG. 5 is an enlarged cross-section N
of the fastener 20 shown in FIG. 4.
[0026] In this embodiment, the side of the position section 20A
adjacent to the coil bobbin 14 is extended to the extent that it
can cover the whole coil 18 of the stator 16, which prevents the
friction between the coil 18 and the rotor 22 so as to protect the
coil 18.
[0027] FIG. 6 is a sectional view showing another motor 2, with the
arrangement of components different from that of the motor 1,
incorporating the fastener structure of the invention. FIG. 7 is an
enlarged cross-section O of the fastener 30 shown in FIG. 6. As
shown in FIG. 6, the motor 2 includes a cooper sleeve 32 and a
silicon steel sheet 34 for securing a coil 36, with the cooper
sleeve 32 touching the silicon steel sheet 34. As shown in FIG. 7,
the cooper sleeve 32 of this embodiment forms with a first notch
having a width t1 and a height h, and then inwardly forms with a
second notch with a depth t2 at the bottom of the first notch. The
first notch and second notch together form an L-shaped notch on the
side surface of the cooper sleeve 32 to accommodate the hook
section 30B of the fastener 30. When the hook section 30B inserts
into the L-shaped notch, the two sides of the position section 30A
respectively press against the cooper sleeve 32 and the top surface
of the silicon steel sheet 34 so as to secure the stator of the
motor 2.
[0028] In view of the above, the invention can be implemented in
various kinds of motors each having different arrangement of
components simply by changing the notch type formed on the cooper
sleeve and modifying the shape of the fastener. Although the motor
1 and the motor 2 are both outer-rotor motors, one having ordinary
skill in the art should understand that the invention can be also
implemented in an inner-rotor motor.
[0029] FIG. 8 is a perspective cross sectional view showing a
fastener of the fastening structure according to still another
embodiment of the invention. The shape of the fastener according to
the invention includes but does not limit to a circular shape. For
example, as shown in FIG. 8, a pair of arc structures 42 and 44
having the same center and radius can be provided between the
cooper sleeve and the stator to achieve the objective of securing
the stator and protecting the coil. Of course, one can only provide
a single arc structure between the cooper sleeve and the
stator.
[0030] Moreover, FIG. 9 shows another modification of the fastener
structure, where the position section 50A of the fastener 50 has a
circular shape while the hook section 50B thereof is composed of a
plurality of arc structures having the same center and radius. It
is understood that the number of the arc structures shown in FIG. 8
and FIG. 9 is not limited, but to satisfy the demand for a firm
connection.
[0031] While the invention has been described by way of example and
in terms of the preferred embodiment, it should be understood that
the invention is not limited to the disclosed embodiments. To the
contrary, it is intended to cover various modifications and similar
arrangements as would be apparent to those skilled in the art.
Therefore, the scope of the appended claims should be accorded the
broadest interpretation so as to encompass all such modifications
and similar arrangements.
* * * * *