U.S. patent application number 14/461496 was filed with the patent office on 2014-12-11 for rotor housing for easy and safe assembling.
The applicant listed for this patent is NEW MOTECH CO., LTD.. Invention is credited to Jeong Cheol JANG, Ji Min LEE.
Application Number | 20140361659 14/461496 |
Document ID | / |
Family ID | 44904180 |
Filed Date | 2014-12-11 |
United States Patent
Application |
20140361659 |
Kind Code |
A1 |
JANG; Jeong Cheol ; et
al. |
December 11, 2014 |
ROTOR HOUSING FOR EASY AND SAFE ASSEMBLING
Abstract
Disclosed is a rotor housing for a motor. The rotor housing has
a shaft bushing in the center thereof and includes a plurality of
operating holes disposed at a defined position between an outer
circumference of the rotor housing and the shaft bushing. The
defined position corresponds to the position of a plurality of
holes formed in a stator to be coupled to the rotor housing.
Inventors: |
JANG; Jeong Cheol; (Gwangju,
KR) ; LEE; Ji Min; (Gwangju, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
NEW MOTECH CO., LTD. |
Gwangju |
|
KR |
|
|
Family ID: |
44904180 |
Appl. No.: |
14/461496 |
Filed: |
August 18, 2014 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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13639670 |
Oct 24, 2012 |
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PCT/KR2011/001597 |
Mar 8, 2011 |
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14461496 |
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Current U.S.
Class: |
310/261.1 |
Current CPC
Class: |
H02K 1/187 20130101;
H02K 5/00 20130101; Y10T 29/49012 20150115; Y10T 29/49009 20150115;
H02K 15/14 20130101; H02K 15/028 20130101; H02K 5/04 20130101; H02K
5/15 20130101; H02K 15/02 20130101 |
Class at
Publication: |
310/261.1 |
International
Class: |
H02K 5/04 20060101
H02K005/04 |
Foreign Application Data
Date |
Code |
Application Number |
May 4, 2010 |
KR |
10-2010-0041886 |
Claims
1. A rotor housing, which has a shaft bushing in the center
thereof, the rotor housing comprising a plurality of operating
holes disposed at a defined position between an outer circumference
of the rotor housing and the shaft bushing.
2. The rotor housing as claimed in claim 2, wherein the defined
position corresponds to the position of a plurality of holes formed
in a stator to be coupled to the rotor housing.
Description
CROSS REFERENCE TO PRIOR APPLICATIONS
[0001] This application is a Divisional Application of U.S. patent
application Ser. No. 13/639,670 filed on Oct. 24, 2012 under 35
U.S.C. .sctn.121, which is a National Stage Patent Application of
PCT International Patent Application No. PCT/KR2011/001597 filed on
Mar. 8, 2011 under 35 U.S.C. .sctn.371, which claims priority to
Korean Patent Application No. 10-2010-0041886 filed on May 4, 2010,
which are all hereby incorporated by reference in their
entirety.
BACKGROUND
[0002] The present invention relates to a motor. More particularly,
the present invention relates to a rotor housing structure and a
method for assembling a motor set using the rotor housing structure
that makes it easier to assemble a rotor and a stator of a motor
set for washing machine on a motor set assembly.
[0003] Generally, motors for driving a tub of a drum type washing
machine are outer rotor type DD (Direct Driving) motors. The
washing machine with a DD motor is assembled in an orderly manner
that a stator is coupled to a motor set assembly of a washer main
body, and then a rotor to the exterior of the stator. FIG. 1
illustrates the assembly procedure of a conventional motor set.
[0004] Referring to FIG. 1, a motor set assembly 100 is shown in
step (a). In the center of the motor set assembly 100 is formed a
shaft 101 for rotating the rotor, with a plurality of stator
assembly holes 105 formed around the shaft 101 for fixing a stator
110 to the motor set assembly 100. In step (b), a plurality of
coupling bushings 111 are formed on the inner side of a stator 110,
and each of them has a hole 112. The holes 112 are arranged in
alignment with the stator assembly holes 105 of the motor set
assembly 100 so that they are coupled to the stator assembly holes
105 through a plurality of rivets 115, in step (c). In this way the
stator 110 is coupled to the motor set assembly 100. In step (d), a
rotor 120 is applied to embrace the stator 110. In the center of
the rotor 120 is formed a resin-molded shaft bushing 125, the
center of which has a shaft coupling portion 121. In step (e), a
rotor fixing bolt 126 is fitted in the shaft coupling portion 121
to complete the assembly of the motor set.
[0005] The assembly method of the conventional motor set involves
applying the stator 110 to the motor set assembly 100 (in steps (b)
and (c)) and then the rotor 120 to the motor set assembly 100 (in
step (d)). This causes a strong friction between the rotor 120 and
the stator 110 as the rotor 120 is applied to embrace the stator
110, because a plurality of magnets (not shown) coupled to the
inner side of the rotor 120 have a strong magnetic attraction
towards the outer circumference (i.e., teeth) of the stator 110.
The friction leaves cracks on the magnets and ends up a need of
replacing the whole rotor 120, resulting in a deterioration of
productivity. Moreover, the worker who manually applies the rotor
to the stator can be seriously injured with his/her hands
accidently stuck between the rotor and stator.
[0006] To overcome the above-mentioned problems, the present
invention proposes a novel rotor housing structure and a method for
assembling a motor set, to improve the operation process.
SUMMARY
[0007] Accordingly, the present invention has been made in view of
the above-mentioned problems occurring in the prior art, and it is
an object of the present invention to provide a novel rotor housing
structure that makes it possible to couple both a rotor and a
stator to a motor set assembly at the same time.
[0008] It is another object of the present invention to provide a
method for assembling a motor set that includes a step of applying
both a rotor and a stator to a motor set assembly at the same time,
thereby preventing damages on the magnets formed on an inner side
of the rotor.
[0009] It is further another object of the present invention to
provide a method for assembling a motor set that enhances
productivity.
[0010] It is still further another object of the present invention
to provide a method for assembling a motor set that prevents
potential accidents of workers.
[0011] To achieve the above object, according to the present
invention, there is provided a method for assembling a motor set
that includes: coupling a rotor housing having a plurality of
operating holes to a stator having shaft bushings with holes formed
therein through the operating holes, thereby making the holes to be
seen through the operating holes; coupling the holes of the stator
associated with the rotor housing to stator assembly holes of a
motor set assembly, the holes of the stator being aligned with the
stator assembly holes of the motor set assembly; and inserting
rivets into the holes through the operating holes and coupling the
rivets to the stator assembly holes.
[0012] The method for assembling a motor set according to the
present invention further includes: coupling a shaft coupling
portion disposed in center of the rotor housing to a shaft of the
motor set assembly.
[0013] In another aspect of the present invention, there is
provided a rotor housing, which has a shaft bushing in the center
thereof, the rotor housing including a plurality of operating holes
disposed at a defined position between an outer circumference of
the rotor housing and the shaft bushing.
[0014] In the rotor housing of the present invention, the defined
position corresponds to the position of a plurality of holes formed
in a stator to be coupled to the rotor housing.
[0015] The present invention introduces a step of applying both a
rotor and a stator to a motor set assembly at the same time, to
prevent damages on the magnets disposed on an inner side of the
rotor, reducing defectiveness of the product and increasing
productivity, and to prevent potential accidents of workers.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] FIG. 1 is a schematic of the assembly procedure according to
a conventional method for assembling a motor set;
[0017] FIG. 2 is a perspective showing a rotor housing according to
the present invention; and
[0018] FIG. 3 is a schematic showing a method for assembling a
motor set according to the present invention.
DETAILED DESCRIPTION
[0019] Hereinafter, an explanation on the preferred embodiments of
the present invention will be given in detail with reference to the
attached drawings.
[0020] FIG. 2 is a perspective showing a rotor housing 10 according
to the present invention.
[0021] In the center of the rotor housing 10 of the present
invention is formed a shaft bushing 11, as shown in FIG. 2. The
shaft bushing 11 preferably is, but not limited to, a resin-molded
portion to be coupled to a shaft of the motor. Otherwise, the shaft
bushing 11 may be formed from a separate member other than a resin
molding material, or formed in integration with the rotor housing
10 instead of using a separate member, to have a shape suitable for
the shaft to be coupled to the center of the rotor housing 10.
[0022] The center of the shaft bushing 11 has a shaft coupling
portion 12 to be coupled to a shaft 101 of a motor set assembly
100. And a plurality of operating holes 15 are formed between the
shaft bushing 11 and the outer circumference of the rotor housing
10. The operating holes 15 are arranged in alignment with coupling
bushings 111 of a stator 110. Holes 112 of the coupling bushings
111 on the inner side of the stator 110 can be seen through the
operating holes 15 so that rivets 115 are fitted in the holes 112
through the operating holes 15. In other words, the operating holes
15 provide operation spaces for the stator 110 to be coupled to the
motor set assembly 100 through the rivets 115. The number of the
operating holes is, but not limited to, six in FIG. 2 and may
depend on the number of the coupling bushings and the holes formed
in the stator.
[0023] With a plurality of operating holes 15, the rotor housing 10
facilitates an assembly of the rivets 115 through the operating
holes 15, thus improving the motor set assembly process. The
improved method for assembling a motor set is described below with
reference to FIG. 3.
[0024] FIG. 3 shows the respective steps of the method for
assembling a motor set according to the present invention.
[0025] Referring to FIG. 3, the rotor housing 10 is coupled to the
stator 110, in step (a), where the operating holes 15 of the rotor
housing 10 are aligned with the holes 112 of the coupling bushings
111. In other words, the rotor housing 10 is coupled to the stator
110 to make the holes 112 to be seen through the operating holes
15. This step (a) is the obvious feature that makes the present
invention different from the conventional assembly method. As
illustrated in FIG. 1, the conventional method for assembling a
motor set involves applying the stator 110 to the motor set
assembly 100 and then the rotor 120 to the stator 110 coupled to
the motor set assembly 100, increasing chances of causing damages
on the magnets of the rotor 120 or potential accidents of the
worker whose hands accidently get stuck between the rotor and the
stator. The present invention, on the other hand, allows the rotor
housing 10 to be applied to the stator 110 not coupled to the motor
set assembly 100, providing a space conveniently large enough for
the rotor housing 10. This may prevent such problems concerning
damages on the magnets or potential accidents of the worker.
[0026] In step (b), both the rotor housing 10 and stator 110
coupled to each other are applied to the motor set assembly 100.
Here, stator assembly holes 105 of the motor set assembly 100 are
aligned with the holes 112 of the shaft bushings 110.
[0027] In step (c), the rivets 115 are inserted in the holes 112
through the operating holes 15 of the rotor housing 10. With the
rivets 115 in the holes 112, the stator 110 can be coupled tightly
to the motor set assembly 100. Rotor fixing bolt 16 is then applied
to complete the assembly of the motor set, in step (d). If
necessary, step (d) may precede step (c).
[0028] While the present invention has been described with
reference to the particular illustrative embodiments, it is not to
be restricted by the embodiments but only by the appended claims.
It is to be appreciated that those skilled in the art can change or
modify the embodiments without departing from the scope and spirit
of the present invention.
* * * * *