U.S. patent application number 15/316619 was filed with the patent office on 2017-06-01 for drum type washing machine.
The applicant listed for this patent is HAIER ASIA CO., LTD., QINGDAO HAIER WASHING MACHINE CO., LTD.. Invention is credited to Hiroyuki TANAKA, Takahiro TSUJI.
Application Number | 20170152626 15/316619 |
Document ID | / |
Family ID | 54832878 |
Filed Date | 2017-06-01 |
United States Patent
Application |
20170152626 |
Kind Code |
A1 |
TSUJI; Takahiro ; et
al. |
June 1, 2017 |
DRUM TYPE WASHING MACHINE
Abstract
Disclosed is a drum type washing machine. A driving unit
includes a driving motor and a clutch mechanism part, where the
clutch mechanism part switches a driving form of the driving unit
between a first-shaft driving form and a second-shaft driving form,
the first-shaft driving form is a form that enables a wing shaft
for transmitting rotation to a stirring body and a drum shaft for
transmitting rotation to a drum to integrally rotate at a same
rotation speed, and the second-shaft driving form is a form that
enables the wing shaft and the drum shaft to respectively rotate at
different rotation speeds. A control part executes first-shaft
switching treatment which is treatment that enables the clutch
mechanism part to work to move the clutch body to the first
position and then enables the driving motor to rotate to engage the
unengaged engaging flange part with the engaged recess.
Inventors: |
TSUJI; Takahiro; (Tokyo,
JP) ; TANAKA; Hiroyuki; (Tokyo, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HAIER ASIA CO., LTD.
QINGDAO HAIER WASHING MACHINE CO., LTD. |
Tokyo
Shandong |
|
JP
CN |
|
|
Family ID: |
54832878 |
Appl. No.: |
15/316619 |
Filed: |
May 21, 2015 |
PCT Filed: |
May 21, 2015 |
PCT NO: |
PCT/CN2015/079426 |
371 Date: |
December 6, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
D06F 2212/02 20130101;
D06F 39/088 20130101; D06F 37/40 20130101; D06F 17/08 20130101;
D06F 39/02 20130101; D06F 39/14 20130101; D06F 34/28 20200201; D06F
37/304 20130101; D06F 23/02 20130101; D06F 33/00 20130101; D06F
37/36 20130101; D06F 37/22 20130101; D06F 39/083 20130101; D06F
39/087 20130101; D06F 23/06 20130101 |
International
Class: |
D06F 37/30 20060101
D06F037/30; D06F 23/06 20060101 D06F023/06; D06F 37/36 20060101
D06F037/36; D06F 33/02 20060101 D06F033/02; D06F 39/02 20060101
D06F039/02; D06F 39/08 20060101 D06F039/08; D06F 39/00 20060101
D06F039/00; D06F 39/14 20060101 D06F039/14; D06F 23/02 20060101
D06F023/02; D06F 37/22 20060101 D06F037/22 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 12, 2014 |
JP |
2014121778 |
Claims
1. A drum type washing machine, provided with: an outer tank,
configured in a housing; a drum, configured in the outer tank and
is capable of rotating by using a horizontal axis or an inclination
axis inclining relative to a horizontal direction as a center; a
rotating body, configured at a rear part of the drum and provided,
on a surface of the rotating body, with a protruding part in
contact with washings; a driving part, configured to enable the
drum and the rotating body to rotate; and a control part,
configured to control working of the driving part, wherein the
driving part comprises: a driving motor; a first rotation shaft,
configured to transmit rotation of the driving motor to the
rotating body; a second rotation shaft, configured to transmit
rotation of the driving motor to the drum; and a clutch mechanism
part, configured to switch a driving form of the driving part
between a first-shaft driving form and a second-shaft driving form,
wherein the first-shaft driving form is a form that enables the
first rotation shaft and the second rotation shaft to integrally
rotate at a same rotation speed, and the second-shaft driving form
is a form that enables the first rotation shaft and the second
rotation shaft to respectively rotate at different rotation speeds,
wherein the clutch mechanism part comprises: a clutch body provided
with a first engaging part, wherein by moving the clutch body to a
first position so as to engage the first engaging part at the first
position with a first engaged part that rotates with rotation of
the driving motor, the driving form is switched to the first-shaft
driving form; the control part executes first-shaft switching
treatment to carry out switching from the second-shaft driving form
to the first-shaft driving form, wherein the first-shaft switching
treatment is treatment that enables the clutch mechanism part to
work to move the clutch body to the first position and then enables
the driving motor to rotate to engage the unengaged first engaging
part and the first engaged part.
2. The drum type washing machine according to claim 1, wherein for
the first-shaft switching treatment, the control part enables the
driving motor to rotate with a driving current lower than a driving
current enabling the driving motor to rotate under the first-shaft
driving form after the first-shaft switching treatment.
3. The drum type washing machine according to claim 1, wherein the
driving part further comprises a planetary gear mechanism, wherein
the planetary gear mechanism is provided with: a sun gear which
rotates along with rotation of the motor; an annular internal gear
which surrounds the sun gear; a plurality of planetary gears which
are arranged between the sun gear and the internal gear; and a
planetary gear carrier which holds the planetary gears in a free
rotation manner, wherein one of the planetary gear carrier and the
internal gear is fixed on the second rotation shaft; the clutch
body is provided with a second engaging part and is connected with
the other one of the planetary gear carrier and the internal gear
in a state of limiting rotation relative to the other one of the
planetary gear carrier and the internal gear toward a
circumferential direction and allowing movement along an axial
direction of the second rotation shaft; by moving the clutch body
to a second position so as to engage the second engaging part at
the second position with a second engaged part that does not rotate
along with rotation of the driving motor and become a non-rotation
state for the other one of the planetary gear carrier and the
internal gear, the driving form is switched to the second-shaft
driving form; even if the clutch mechanism part works to enable the
clutch body to move to the second position, the second engaging
part is not engaged with the second engaged part, and at this
moment, the other one of the planetary gear carrier and the
internal gear rotates along with rotation of the driving motor, so
that the clutch body rotates; and the control part executes
second-shaft switching treatment to carry out switching from the
second-shaft driving form to the first-shaft driving form, wherein
the second-shaft switching treatment is treatment that enables the
clutch mechanism part to work to move the clutch body to the second
position and then enables the driving motor to rotate to engage the
unengaged second engaging part with the second engaged part.
4. The drum type washing machine according to claim 3, wherein for
the second-shaft switching treatment, the control part enables the
driving motor to rotate with a driving current lower than a driving
current enabling the driving motor to rotate under the second-shaft
driving form after the second-shaft switching treatment.
5. The drum type washing machine according to claim 3, further
comprising a clutch driving apparatus configured to enable the
clutch body to move, wherein the clutch driving apparatus
comprises: a working body, capable of being transferred to a first
working state enabling the clutch body to move to the first
position and a second working state enabling the clutch body to
move to the second position; and a state detection part, configured
to detect a working state of the working body, wherein for the
first-shaft switching treatment, the control part enables the
clutch driving apparatus to work according to a detection result of
the state detection part so as to enable the working body to be
transferred to the first working state; and for the second-shaft
switching treatment, the control part enables the clutch driving
apparatus to work according to a detection result of the state
detection part so as to enable the working body to be transferred
to the second working state.
6. The drum type washing machine according to claim 2, wherein the
driving part further comprises a planetary gear mechanism, wherein
the planetary gear mechanism is provided with: a sun gear which
rotates along with rotation of the motor; an annular internal gear
which surrounds the sun gear; a plurality of planetary gears which
are arranged between the sun gear and the internal gear; and a
planetary gear carrier which holds the planetary gears in a free
rotation manner, wherein one of the planetary gear carrier and the
internal gear is fixed on the second rotation shaft; the clutch
body is provided with a second engaging part and is connected with
the other one of the planetary gear carrier and the internal gear
in a state of limiting rotation relative to the other one of the
planetary gear carrier and the internal gear toward a
circumferential direction and allowing movement along an axial
direction of the second rotation shaft; by moving the clutch body
to a second position so as to engage the second engaging part at
the second position with a second engaged part that does not rotate
along with rotation of the driving motor and become a non-rotation
state for the other one of the planetary gear carrier and the
internal gear, the driving form is switched to the second-shaft
driving form; even if the clutch mechanism part works to enable the
clutch body to move to the second position, the second engaging
part is not engaged with the second engaged part, and at this
moment, the other one of the planetary gear carrier and the
internal gear rotates along with rotation of the driving motor, so
that the clutch body rotates; and the control part executes
second-shaft switching treatment to carry out switching from the
second-shaft driving form to the first-shaft driving form, wherein
the second-shaft switching treatment is treatment that enables the
clutch mechanism part to work to move the clutch body to the second
position and then enables the driving motor to rotate to engage the
unengaged second engaging part with the second engaged part.
7. The drum type washing machine according to claim 6, wherein for
the second-shaft switching treatment, the control part enables the
driving motor to rotate with a driving current lower than a driving
current enabling the driving motor to rotate under the second-shaft
driving form after the second-shaft switching treatment.
8. The drum type washing machine according to claim 4, further
comprising a clutch driving apparatus configured to enable the
clutch body to move, wherein the clutch driving apparatus
comprises: a working body, capable of being transferred to a first
working state enabling the clutch body to move to the first
position and a second working state enabling the clutch body to
move to the second position; and a state detection part, configured
to detect a working state of the working body, wherein for the
first-shaft switching treatment, the control part enables the
clutch driving apparatus to work according to a detection result of
the state detection part so as to enable the working body to be
transferred to the first working state; and for the second-shaft
switching treatment, the control part enables the clutch driving
apparatus to work according to a detection result of the state
detection part so as to enable the working body to be transferred
to the second working state.
9. The drum type washing machine according to claim 7, further
comprising a clutch driving apparatus configured to enable the
clutch body to move, wherein the clutch driving apparatus
comprises: a working body, capable of being transferred to a first
working state enabling the clutch body to move to the first
position and a second working state enabling the clutch body to
move to the second position; and a state detection part, configured
to detect a working state of the working body, wherein for the
first-shaft switching treatment, the control part enables the
clutch driving apparatus to work according to a detection result of
the state detection part so as to enable the working body to be
transferred to the first working state; and for the second-shaft
switching treatment, the control part enables the clutch driving
apparatus to work according to a detection result of the state
detection part so as to enable the working body to be transferred
to the second working state.
Description
TECHNICAL FIELD
[0001] The present disclosure relates to a drum type washing
machine, which can not only continuously operate from washing to
drying, but also carry out washing without drying.
BACKGROUND
[0002] Previously, a drum type washing machine stores water in an
outer tank at the bottom to enable a transverse-shaft type drum to
rotate, washings are lifted up and dropped down by baffles arranged
in the drum, and the washings are thrown to the inner
circumferential surface of the drum to be washed (with reference to
a patent document 1).
[0003] In this way, in a structure of stirring the washings by the
baffle, the washings are difficult to twine or rub against each
other. Therefore, compared with an automatic washing machine which
washes the washings through rotation of a pulsator in a washing and
dewatering tank, the drum type washing machine has mechanical
force, acting on the washings, easy to get small, and has
detergency easy to lower.
[0004] Therefore, in the drum type washing machine, in order to
improve the detergency, a structure that a stirring body is
arranged on the rear surface of the drum may be adopted, so that
the drum and the stirring body can rotate at different rotation
speeds when in washing and rinsing.
CURRENT TECHNICAL LITERATURE
Patent Literature
[0005] Patent Literature 1: Japanese Laid-Open Patent Publication
No. 2013-240577
SUMMARY
Problems to be Solved by the Disclosure
[0006] In a drum type washing machine with the above structure, a
drum and a stirring body need to integrally rotate at a same
rotation speed when in dewatering. Therefore, a clutch mechanism
part is arranged at a driving part of the drum and the stirring
body, so that a driving form of the driving part can be switched
between a first-shaft driving form that enables the drum and the
stirring body to integrally rotate at the same rotation speed and a
second-shaft driving form that enables the drum and the stirring
body to respectively rotate at different rotation speeds.
[0007] Under such condition that the driving form is switched by
the clutch mechanism part, if switching is carried out in poor
precision, the situation that the drum and the stirring body
incorrectly work to lose the expected performance occurs, causing
lowered reliability.
[0008] The present disclosure is completed in view of the problems
and aims at providing a drum type washing machine which can realize
switching of the driving form of the driving part through the
clutch mechanism part in good precision.
Solution for Solving the Problems
[0009] The drum type washing machine in a main manner of the
present disclosure includes: an outer tank, configured in a
housing; a drum, configured in the outer tank and is capable of
rotating by using a horizontal axis or an inclination axis
inclining relative to a horizontal direction as a center; a
rotating body, configured at a rear part of the drum and provided,
on a surface of the rotating body, with a protruding part in
contact with washings; a driving part, configured to enable the
drum and the rotating body to rotate; and a control part,
configured to control working of the driving part. Herein, the
driving part includes: a driving motor; a first rotation shaft
which transmits rotation of the driving motor to the rotating body;
a second rotation shaft which transmits rotation of the driving
motor to the drum; and a clutch mechanism part which enables a
driving form of the driving part to be switched between a
first-shaft driving form and a second-shaft driving form, wherein
the first-shaft driving form is a form that enables the first
rotation shaft and the second rotation shaft to integrally rotate
at a same rotation speed, and the second-shaft driving form is a
form that enables the first rotation shaft and the second rotation
shaft to respectively rotate at different rotation speeds. In
addition, the clutch mechanism part includes a clutch body provided
with a first engaging part, where by moving the clutch body to a
first position so as to engage the first engaging part at the first
position with a first engaged part that rotates with rotation of
the driving motor, the driving form is switched to the first-shaft
driving form. In order to carry out switching from the second-shaft
driving form to the first-shaft driving form, the control part
executes first-shaft switching treatment, wherein the first-shaft
switching treatment is treatment that enables the driving motor to
rotate to engage the unengaged first engaging part with the first
engaged part after enabling the clutch mechanism part to work to
move the clutch body to the first position.
[0010] According to the above structure, even if dislocation
between the first engaging part and the first engaged part is
generated when the clutch mechanism part is operated to move the
clutch body to the first position, the dislocation can be
eliminated, so that the first engaging part is engaged with the
first engaged part. Therefore, switching from the second-shaft
driving form to the first-shaft driving form can be carried out in
good precision.
[0011] In the drum type washing machine in the manner, for the
first-shaft switching treatment, the control part may adopt a
structure that the driving motor rotates with a driving current
lower than a driving current enabling the driving motor to rotate
under the first-shaft driving form after the first-shaft switching
treatment.
[0012] According to the above structure, for the first-shaft
switching treatment, as the driving motor can slowly rotate, the
first engaging part is easily engaged with the first engaged part,
thereby improving switching precision.
[0013] The drum type washing machine in the manner may adopt a
structure below, namely, the driving part further includes a
planetary gear mechanism, wherein the planetary gear mechanism is
provided with: a sun gear which rotates along with rotation of the
motor; an annular internal gear which surrounds the sun gear; a
plurality of planetary gears which are arranged between the sun
gear and the internal gear; and a planetary gear carrier which
holds the planetary gears in a free manner, wherein one of the
planetary gear carrier and the internal gear is fixed on the second
rotation shaft. Under such condition, the drum type washing machine
in the manner may adopt a structure below, namely, the clutch body
is provided with a second engaging part and is connected with the
other one of the planetary gear carrier and the internal gear in a
state of limiting rotation relative to the other one of the
planetary gear carrier and the internal gear toward a
circumferential direction and allowing movement along an axial
direction of the second rotation shaft. Through such structures,
the driving part enables the clutch body to move to a second
position, the second engaging part is engaged with a second engaged
part that does not rotate along with rotation of the driving motor
at the second position, and the other one of the planetary gear
carrier and the internal gear is in a non-rotation state, so that
the driving form is switched to the second-shaft driving form. Even
if the clutch mechanism part works to enable the clutch body to
move to the second position, the other one of the planetary gear
carrier and the internal gear can also rotate along with rotation
of the driving motor when the second engaging part is not engaged
with the second engaged part, thereby causing rotation of the
clutch body. In order to carry out switching from the second-shaft
driving form to the first-shaft driving form, the control part
executes second-shaft switching treatment, wherein the second-shaft
switching treatment is treatment that enables the driving motor to
rotate to engage the unengaged second engaging part with the second
engaged part after enabling the clutch mechanism part to work to
move the clutch body to the second position.
[0014] According to the above structure, even if dislocation
between the second engaging part and the second engaged part is
generated when the clutch mechanism part is operated to move the
clutch body to the second position, the dislocation can be
eliminated, so that the second engaging part is engaged with the
second engaged part. Therefore, switching from the first-shaft
driving form to the second-shaft driving form can be carried out in
good precision.
[0015] Under a situation of adopting the above structure, further,
for the second-shaft switching treatment, the control part may
adopt a structure that the driving motor rotates with a driving
current lower than a driving current enabling the driving motor to
rotate under the second-shaft driving form after the second-shaft
switching treatment.
[0016] As long as such structure is adopted, for the second-shaft
switching treatment, as the driving motor can slowly rotate, the
second engaging part is easily engaged with the second engaged
part, thereby improving switching precision.
[0017] Under a situation of adopting the above structure, the drum
type washing machine is further provided with a clutch driving
apparatus configured to enable the clutch body to move. Under such
condition, the clutch driving apparatus includes: a working body
which can be transferred to a first working state enabling the
clutch body to move to the first position and a second working
state enabling the clutch body to move to the second position; and
a state detection part which detects a working state of the working
body. For the first-shaft switching treatment, the control part
enables the clutch driving apparatus to work according to a
detection result of the state detection part so as to enable the
working body to be transferred to the first working state; and for
the second-shaft switching treatment, the control part enables the
clutch driving apparatus to work according to a detection result of
the state detection part so as to enable the working body to be
transferred to the second working state
[0018] As long as such structure is adopted, as the position of the
clutch body is indirectly detected by detecting the working state
of the working body, the driving form of the driving part can be
switched with no need of using a sensor and the like configured to
directly detect the position of the clutch body.
Effects of the Disclosure
[0019] According to the present disclosure, the drum type washing
machine can be provided, which can realize switching of the driving
form of the driving part through the clutch mechanism part in good
precision.
[0020] The effects and the significance of the present disclosure
may be further defined through the description of an implementation
manner shown below. However, the implementation manner below is
only one illustration when the present disclosure is implemented,
and the present disclosure is not limited by a technical solution
described by the implementation manner below.
BRIEF DESCRIPTION OF DRAWINGS
[0021] FIG. 1 is a side sectional view illustrating a structure of
a drum type washing machine involved in an implementation
manner;
[0022] FIG. 2 is a sectional view illustrating a structure of a
driving unit involved in an implementation manner;
[0023] FIG. 3 is a sectional view illustrating a structure of a
driving unit involved in an implementation manner;
[0024] FIG. 4 is a front view illustrating a rotor and a rotor
structure of a driving motor involved in an implementation
manner;
[0025] FIG. 5 is an enlarged stereoscopic view illustrating a rear
part of a bearing unit formed with a rack involved in an
implementation manner;
[0026] FIG. 6 is a diagram illustrating a structure of a clutch
body of a clutch mechanism part involved in an implementation
manner;
[0027] FIG. 7 is a block diagram illustrating a structure of the
drum type washing machine involved in an implementation manner;
[0028] FIG. 8 is a diagram illustrating a state that an engaging
flange part of the clutch body and an engaged recess of the rotor
generate dislocation involved in an implementation manner;
[0029] FIG. 9 is a flow chart illustrating first-shaft switching
treatment involved in an implementation manner;
[0030] FIG. 10 is a flow chart illustrating second-shaft switching
treatment involved in an implementation manner;
[0031] FIG. 11 is a diagram illustrating a structure of a driving
unit involved in a changed example.
DETAILED DESCRIPTION
[0032] A drum type washing machine without a drying function as an
implementation manner of a drum type washing machine of the present
disclosure is described below with reference to the drawings.
[0033] FIG. 1 is a side sectional view illustrating a structure of
a drum type washing machine 1.
[0034] The drum type washing machine 1 is provided with a housing
10 forming an appearance. A front surface 10a of the housing 10
inclines from the central part to the upper part, a throwing
opening 11 of washings is formed on the inclined surface, and the
throwing opening 11 is covered by a freely opened/closed door
12.
[0035] An outer tank 20 is elastically supported by a plurality of
shock absorbers in the housing 10. A drum 22 is configured in the
outer tank 20 in a free rotation way. The outer tank 20 and the
drum 22 incline in a manner that the rear surface sides become
lower relative to a horizontal direction. Therefore, the drum 22
rotates by using an inclined shaft inclining relative to the
horizontal direction as the center. The inclination angles of the
outer tank 20 and the drum 22 are set as about 10-20 degrees. An
opening part 20a of the front surface of the outer tank 20 and an
opening part 22a of the front surface of the drum 2 are opposite to
the throwing opening 11 and are closed by the door 12 together with
the throwing opening 11. A plurality of dewatering holes 22b are
formed in the inner circumferential surface of the drum 22. Then,
three baffles 23 are arranged on the inner circumferential surface
of the drum 22 along a circumferential direction at almost equal
intervals.
[0036] A stirring body 24 is configured at the rear part of the
drum 22 in a free rotation way and is in an approximate disc shape.
A plurality of blades 24a radially extending from the central part
are formed on the surface of the stirring body 24. The stirring
body 24 and the drum 22 coaxially rotate. The stirring body 24 is
equivalent to a rotating body of the present disclosure, and the
blades 24 are equivalent to protrusion parts of the present
disclosure.
[0037] A driving unit 30 generating a torque for driving the drum
22 and the stirring body 24 is configured to behind the outer tank
20 and is equivalent to a driving part of the present disclosure.
The driving unit 30 enables the drum 22 and the stirring body 24 to
rotate along the same direction at different rotation speeds in a
washing process and a rinsing process. Specifically, the driving
unit 30 enables the drum 22 to rotate at a rotation speed with the
centrifugal force exerted on the washings in the drum 22 less than
the gravity and enables the stirring body 24 to rotate at a
rotation speed higher than that of the drum 22. In another aspect,
the driving unit 30 enables the drum 22 and the stirring body 24 to
integrally rotate at a rotation speed with the centrifugal force
exerted on the washings in the drum 22 far more than the gravity in
a dewatering process. The detailed structure of the driving unit 30
is described subsequently.
[0038] A water outlet part 20b is formed at the bottom of the outer
tank 20. A drainage valve 40 is arranged in the water outlet part
20b and is connected with a drainage hose 41. Water stored in the
outer tank 20 is discharged out of the machine through the drainage
hose 41 when the drainage valve 40 is opened.
[0039] A detergent box 50 is configured at the front upper part in
the housing 10. A detergent container 50a containing a detergent,
which can be freely drawn out from the front of the detergent box
50, is contained in the detergent box 50. The detergent box 50 is
connected with a water-feeding valve 51 configured to at the rear
upper part in the housing 10 through a water-feeding hose 52. In
addition, the detergent box 50 is connected with the upper part of
the outer tank 20 through a water injection pipe 53. Tap water from
a faucet is supplied into the outer tank 20 through the
water-feeding hose 52, the detergent box 50 and the water injection
pipe 53 when the water-feeding valve 51 is opened. At this moment,
the detergent contained in the detergent container 50a is supplied
into the outer tank 20 along with a water flow.
[0040] Next, the structure of the driving unit 30 is described in
detail.
[0041] FIG. 2 and FIG. 3 are sectional views illustrating the
structure of the driving unit 30. FIG. 2 is a sectional view
illustrating a state that a driving form of the driving unit 30 is
switched to a second-shaft driving form, and FIG. 3 is a sectional
view illustrating a state that the driving form of the driving unit
30 is switched to a first-shaft driving form. FIG. 4 is a front
view illustrating a structure of a rotor 110 of a driving motor
100. FIG. 5 is an enlarged stereoscopic view illustrating a rear
part of a bearing unit 500, on which a rack 514 is formed. FIGS.
6(a)-6(c) are diagrams illustrating a structure of a clutch body
610 of a clutch mechanism part 600 and are respectively a front
view, a right view and a rear view of the clutch body 610.
[0042] The driving unit 30 includes: the driving motor 100, a wing
shaft 200, a drum shaft 300, a planetary gear mechanism 400, the
bearing unit 500 and the clutch mechanism part 600. The driving
motor 100 generates the torque used for driving the stirring body
24 and the drum 22. The wing shaft 200 rotates through the torque
of the driving motor 100 and transmits rotation to the stirring
body 24. The wing shaft 200 is equivalent to a first rotation shaft
of the present disclosure. The planetary gear mechanism 400 slows
down rotation of the wing shaft 200, i.e. rotation of the rotor 110
of the driving motor 100, and transmits rotation to the drum shaft
300. The drum shaft 300 coaxially rotates with the wing shaft 200
at a rotation speed after being slowed down by the planetary gear
mechanism 400 and transmits rotation to the drum 22. The drum shaft
300 is equivalent to a second rotation shaft of the present
disclosure. The bearing unit 500 supports the wing shaft 200 and
the drum shaft 300 in a free rotation way. The clutch mechanism
part 600 switches a driving form of the driving motor 100 between
the second-shaft driving form and the first-shaft driving form,
wherein the second-shaft driving form is a form that enables the
stirring body 24, i.e. the wing shaft 200, to rotate at a rotation
speed that is equal to that of the driving motor 100 and enables
the drum 22, i.e. the drum shaft 300, to rotate at a rotation speed
after being slowed down by the planetary gear mechanism 400; and
the first-shaft driving form is a form that enables the stirring
body 24 and the drum 22, i.e. the wing shaft 200 and the drum shaft
300, and the planetary gear mechanism 400 to integrally rotate at a
rotation speed that is equal to that of the driving motor 100.
[0043] The driving motor 100 is an outer rotor type DC (Direct
Current) brushless motor and includes the rotor 110 and a stator
120. The rotor 110 is in a cylindrical shape with a bottom, and
permanent magnets 111 are arranged on the inner circumferential
surface and the whole circumference of the rotor 110. As shown in
FIG. 4, a round shaft sleeve part 112 is formed at the central part
of the rotor 110. A shaft sleeve hole 113 configured to fix the
wing shaft 200 is formed in the shaft sleeve part 112, and an
annular engaged recess 114 is formed on the outer circumference of
the shaft sleeve hole 113. Concave-convex parts 114a are arranged
at the outer circumferential part and the whole circumference of
the engaged recess 114. The engaged recess 114 is equivalent to a
first engaged part of the present disclosure.
[0044] A coil 121 is arranged at the outer circumferential part of
the stator 120. The rotor 110 rotates when an after-mentioned motor
driving part supplies driving current to the coil 121 of the stator
120.
[0045] The drum shaft 300 is in a hollow shape, and the wing shaft
200 and the planetary gear mechanism 400 are wrapped inside the
drum shaft 300. The central part of the drum shaft 300 is bulged
toward the outer side, and the bulging part forms a containing part
of the planetary gear mechanism 400.
[0046] The planetary gear mechanism 400 includes: a sun gear 410,
an annular internal gear 420 which surrounds the sun gear 410, a
plurality of groups of planetary gears 430 which are arranged
between the sun gear 410 and the internal gear 420 and a planetary
gear carrier 440 which holds the planetary gears 430 in a free
rotation manner.
[0047] The sun gear 410 is fixed on the wing shaft 200, and the
internal gear 420 is fixed on the drum shaft 300. One group of
planetary gears 430 includes a first gear and a second gear which
are engaged with each other and rotate in reverse directions. The
planetary gear carrier 440 includes a gear carrier shaft 441
extending backward. The gear carrier shaft 441 is coaxial with the
drum shaft 300, and a hollow part is formed in the gear carrier
shaft 441, so as to insert the wing shaft 200.
[0048] The rear end part of the wing shaft 200 protrudes backward
from the gear carrier shaft 441 and is fixed in the shaft sleeve
hole 113 on the rotor 110.
[0049] A cylindrical bearing part 510 is arranged at the central
part of the bearing unit 500. In the bearing part 510, a roller 511
and a roller 512 are respectively arranged at the front part and
the rear part, and a mechanical sealing element 513 is arranged at
the front end part. The outer circumferential surface of the drum
shaft 300 is supported by the rollers 511 and 512, and the drum
shaft 300 smoothly rotates in the bearing part 510. In addition,
the mechanical sealing element 513 prevents water from invading
between the bearing part 510 and the drum shaft 300. As shown in
FIG. 5, racks 514 are formed on the inner surface and the whole
circumference of the rear end part of the bearing part 510. The
racks 514 are equivalent to second engaged parts of the present
disclosure.
[0050] In the bearing unit 500, a fixed flange part 520 is formed
at the circumference of the bearing part 510. A mounting boss 521
is formed at the lower end part of the fixed flange part 520.
[0051] In the fixed flange part 520, the bearing unit 500 is fixed
on the rear surface of the outer tank 20 by a fixing method of
screw fastening and the like. In a state that the driving unit 30
is installed in the outer tank 20, the wing shaft 200 and the drum
shaft 300 are faced with the inner part of the outer tank 20. The
drum 22 is fixed on the drum shaft 300, and the stirring body 24 is
fixed on the wing shaft 200.
[0052] The clutch mechanism part 600 includes: the clutch body 610,
a clutch spring 620, a clutch lever 630, a lever supporting part
640, a clutch driving apparatus 650, a jointing rod 660 and a
mounting plate 670.
[0053] As shown in FIGS. 6(a)-6(c), the clutch body 610 is in an
approximate disc shape. An annular rack 611 is formed on the outer
circumferential surface of the front end part of the clutch body
610. The rack 611 is formed in a manner of being engaged with the
rack 514 of the bearing unit 500. In addition, on the outer
circumferential surface of the clutch body 610, a flange part 612
is formed behind the rack 611. Further, an annular engaging flange
part 613 is formed at the rear end part on the clutch body 610. The
engaging flange part 613 is in a shape the same as that of the
engaged recess 114 of the rotor 110, and concave-convex parts 613a
are arranged on the outer circumferential part and the whole
circumference of the engaging flange part 613. The concave-convex
parts 613a are engaged with each other when the engaging flange
part 613 is inserted into the engaged recess 114. The engaging
flange part 613 is equivalent to a first engaging part of the
present disclosure, and the racks 611 are equivalent to second
engaging parts of the present disclosure.
[0054] The gear carrier shaft 441 is inserted into a shaft hole 614
of the clutch body 610. A rack 614a formed on the inner
circumferential surface of the shaft hole 614 is engaged with a
rack 441a formed on the outer circumferential surface of the gear
carrier shaft 441. Therefore, the clutch body 610 becomes a state
of allowing movement back and forth and limiting rotation in a
circumferential direction relative to the gear carrier shaft
441.
[0055] On the clutch body 610, an annular containing tank 615 is
formed on the outer side of the shaft hole 614, and the clutch
spring 620 is contained in the containing tank 615. One end of the
clutch spring 620 is connected with the rear end part of the
bearing part 510, and the other end of the clutch spring 620 is
connected with the bottom surface of the containing tank 615.
[0056] A pressing part 631 which is in contact with the rear
surface of the flange part 612 of the clutch body 610 and pushes
the flange part 612 forward is formed at the upper end part of the
clutch lever 630. The clutch lever 630 is supported by a supporting
shaft 641 arranged on the lever supporting part 640 in a free
rotation way. A mounting shaft 632 is formed at the lower end part
of the clutch lever 630.
[0057] The clutch driving apparatus 650 is configured under the
clutch lever 630. The clutch driving apparatus 650 includes a
torque motor 651 and a disc-shaped cam 652 that rotates around a
horizontal axis through a torque of the torque motor 651. A cam
shaft 653 is arranged at the outer circumferential part on the cam
652. The rotating center of the cam 652 is the same as the center
of the mounting shaft 632 of the clutch lever 630 in the
forward-and-backward direction. The cam 652 is equivalent to a
working body of the present disclosure.
[0058] The jointing rod 660 extends in the up-and-down direction
and is configured to connect the clutch lever 630 and the cam 652.
The upper end part of the jointing rod 660 is installed on the
mounting shaft 632 of the clutch lever 630, and the lower end part
of the jointing rod 660 is installed on the cam shaft 653 of the
cam 652. A spring 661 is integrally formed at the middle position
of the jointing rod 660 and is an extension spring.
[0059] The lever supporting part 640 and the clutch driving
apparatus 650 are fixed on the mounting plate 670 by a fixing
method of screw fastening and the like. The mounting plate 670 is
fixed on the mounting boss 521 of the bearing unit 500 by
screws.
[0060] Under a situation of switching the driving form of the
driving unit 30 from the first-shaft driving form to the
second-shaft driving form, as shown in FIG. 2, the cam 652 rotates
through the torque motor 651 to enable the cam shaft 653 to be
located at the lowest position. Along with rotation of the cam 652,
the lower end part of the clutch lever 630 is pulled to the lower
part by the jointing rod 660. The clutch lever 630 rotates forward
by using the supporting shaft 641 as the center, and the pressing
part 631 pushes the clutch body 610 forward. The clutch body 610
moves forward against the elasticity of the clutch spring 620, and
the rack 611 of the clutch body 610 is engaged with the rack 514 of
the bearing unit 500.
[0061] The rack 611 arrives at the position where the rack 611 is
engaged with the rack 514 when the cam shaft 653 of the clutch body
610 moves to the assigned central position. At this moment, the
spring 661 of the jointing rod 660 is in a natural length state.
Since the clutch body 610 does not move to the position more
forward than the engaging position, when the cam shaft 653 moves to
the lowest position from the specified position, as shown in FIG.
2, the spring 661 extends to the lower part. In this way, since the
clutch lever 630 is pulled by the spring 661 in a forward rotation
manner, the pressing part 631 exerts pressing force onto the clutch
body 610 positioned at the engaging position, so that the rack 611
is tightly engaged with the rack 514.
[0062] In addition, the position of the clutch body 610, at which
the rack 611 is engaged with the rack 514, is called a second
position below. In addition, the working state of the cam 652 when
the cam shaft 653 is positioned at the lowest position is called a
second working state below.
[0063] When the rack 611 is engaged with the rack 514, since
rotation of the clutch body 610 relative to the bearing unit 500 in
a circumferential direction is limited and the clutch body 610
becomes a non-rotation state, the gear carrier shaft 441 of the
planetary gear mechanism 400, namely, the planetary gear carrier
440, becomes a state of being fixed in a non-rotation manner. Under
such state, when the rotor 110 rotates, the wing shaft 200 rotates
at a rotation speed that is equal to that of the rotor 110, and the
stirring body 24 connected with the wing shaft 200 also rotates at
a rotation speed that is equal to that of the rotor 110. The sun
gear 410 in the planetary gear mechanism 400 rotates along with
rotation of the wing shaft 200. As described above, since the
planetary gear carrier 440 is in the state of being fixed, the
first gears and the second gears of the planet gears 430
respectively rotate in the same direction and in the reverse
direction with the sun gear 410, and the internal gear 420 and the
sun gear 410 rotate in the same direction. Therefore, the drum
shaft 300 fixed on the internal gear 420 rotates in the same
direction as the wing shaft 200 and at a rotation speed slower than
that of the wing shaft 200, and the drum 22 fixed on the drum shaft
300 rotates at a rotation speed slower than that of the stirring
body 24 and in the same direction as the stirring body 24. In other
words, the stirring body 24 rotates at a rotation speed higher than
that of the drum 22 in the same direction as the drum 22.
[0064] In another aspect, under a situation of switching the form
of the driving unit 30 from the second-shaft driving form to the
first-shaft driving form, as shown in FIG. 3, the cam 652 rotates
through the torque motor 651 to enable the cam shaft 653 to be
position at the highest part. When the cam 652 rotates, and the cam
shaft 653 moves upward, firstly, the spring 661 is contracted.
After the spring 661 restores to the natural length, the jointing
rod 660 moves upward along with movement of the cam shaft 653, and
the lower end part of the clutch lever 630 is pushed by the
jointing rod 660 to move upward. The clutch lever 630 rotates
backward by using the supporting shaft 641 as the center, and the
pressing part 631 is separated from the flange part 612 of the
clutch body 610. The clutch body 610 moves backward through the
elasticity of the clutch spring 620, and the engaging flange part
613 of the clutch body 610 is engaged with the engaged recess 114
of the rotor 110.
[0065] In addition, the position of the clutch body 610, at which
the engaging flange part 613 is engaged with the engaged recess
114, is called a first position below. In addition, the working
state of the cam 652 when the cam shaft 653 is positioned at the
highest part is called a first working state below.
[0066] When the engaging flange part 613 is engaged with the
engaged recess 114, rotation relative to the rotor 110 toward a
circumferential direction of the clutch body 610 is limited, and
the clutch body 610 and the rotor 110 become a rotatable state.
Under such state, the wing shaft 200 and the clutch body 610 rotate
at a rotate speed that is equal to that of the rotor 110 when the
rotor 110 rotates. At this moment, the sun gear 410 and the
planetary gear carrier 440 rotate at a rotation speed that is equal
to that of the rotor 110 in the planetary gear mechanism 400.
Therefore, the internal gear 420 rotates at a rotation speed that
is equal to that of the sun gear 410 and the planetary gear carrier
440, and the drum shaft 300 fixed on the internal gear 420 rotates
at a rotation speed that is equal to that of the rotor 110. Namely,
the wing shaft 200, the planetary gear mechanism 400 and the drum
shaft 300 integrally rotate in the driving unit 30, so that the
drum 22 and the stirring body 24 integrally rotate.
[0067] FIG. 7 is a block diagram illustrating the structure of the
drum type washing machine 1.
[0068] In addition to the above structure, the drum type washing
machine 1 is further provided with: a control part 701, a storage
part 702, an operation part 703, a water level sensor 704, the
motor driving part 705, a water-feeding driving part 706, a
drainage driving part 707, a clutch driving part 708 and a door
locking apparatus 709.
[0069] The operation part 703 includes: a power button 703a, a
start button 703b and a program selection button 703c. The power
button 703a is a button configured to switch on and off a power
supply of the drum type washing machine 1. The start button 703b is
a button configured to start rotation. The mode selection button
703c is a button configured to select any running program from a
plurality of running programs related to washing running. The
operation part 703 outputs an input signal corresponding to the
button operated by a user to the control part 701.
[0070] The water level sensor 704 detects a water level in the
outer tank 20 and outputs a water level detection signal
corresponding to the detected water level to the control part
701.
[0071] The motor driving part 705 supplies the driving current to
the driving motor 100 according to a control signal from the
control part 701. The motor driving part 705 is provided with a
speed sensor for detecting rotation speed of the driving motor 100,
an inverter circuit and the like, and adjusts the driving current
to enable the driving motor 100 to rotate at a rotation speed set
by the control part 701.
[0072] The water-feeding driving part 706 supplies the driving
current to the water-feeding valve 51 according to the control
signal from the control part 701. The drainage driving part 707
supplies the driving current to the drainage valve 40 according to
the control signal from the control part 701.
[0073] The clutch driving apparatus 650 includes a first detection
sensor 654 and a second detection sensor 655. The first detection
sensor 654 and the second detection sensor 655 form a state
detection part of the present disclosure. The first detection
sensor 654 detects that the cam 652 becomes a first working state
and outputs a detection signal to the control part 701. The second
detection sensor 655 detects that the cam 652 becomes second
working state and outputs a detection signal to the control part
701. The clutch driving part 708 supplies the driving current to
the torque motor 651 according to the detection signals from the
first detection sensor 654 and the second detection sensor 655 as
well as the control signal output by the control part 701.
[0074] The door locking apparatus 709 locks and unlocks the door 12
according to the control signal from the control part 701.
[0075] The storage part 702 includes an EEPROM (Electrically
Erasable Programmable Read-Only Memory), an RAM (Random Access
Memory) and the like. A program used for executing the washing
running in a variety of washing running programs is stored in the
storage part 702. In addition, a variety of parameters and a
variety of control marks used for executing the programs are stored
in the storage part 702.
[0076] The control part 701 controls the motor driving part 705,
the water-feeding driving part 706, the drainage driving part 707,
the clutch driving part 708, the door locking apparatus 709 and the
like according to the programs stored in the storage part 702 and
based on various signals from the operation part 703, the water
level sensor 704 and the like.
[0077] The drum type washing machine 1 carries out the washing
running in the variety of washing running programs according to a
selection operation of the user carried out by the program
selection button 703c. A washing process, a middle dewatering
process, a rinsing process and a final dewatering process are
sequentially carried out in the washing running. In addition,
sometimes, the middle dewatering process and the rinsing process
can be carried out for more than two times according to the running
program.
[0078] The driving form of the driving unit 30 is switched to the
second-shaft driving form in the washing process and the rinsing
process. Water is stored in the outer tank 20 at the specified
water level lower than the lower edge of the throwing opening 11 to
enable the washings in the drum 22 to be immersed into the water,
and under such state, the driving motor 100 alternatively rotates
in the forward direction and in the reverse direction. Therefore,
the drum 22 and the stirring body 24 alternatively rotate in the
forward direction and in the reverse direction in a state that
rotation speed of the stirring body 24 is higher than that of the
drum 22. At this moment, the drum 22 rotates at a rotation speed
with the centrifugal force acted on the washings less than the
gravity.
[0079] The washings in the drum 22 are lifted up and dropped down
by the baffles and are thrown to the inner circumferential surface
of the drum 22. Besides, at the rear part of the drum 22, the
washings are in contact with the blades 24a of the rotating
stirring body 24, and rubbed and stirred by the blades 24a.
Therefore, the washings are washed or rinsed.
[0080] In the middle dewatering process and the final dewatering
process, the driving form of the driving unit 30 is switched to the
first-shaft driving form. The driving motor 100, namely, the drum
22 and the stirring body 24, rotates at a rotation speed with the
centrifugal force acted on the washings in the drum 22 far more
than the gravity. The washings are pressed on the inner
circumferential surface through the action of the centrifugal force
and are dewatered.
[0081] So, when switching is carried out from the second-shaft
driving form to the first-shaft driving form, and the clutch body
610 is moved to the first position through the elasticity of the
clutch spring 620, as shown in FIG. 8, sometimes, the
concave-convex parts 613a and 114a are dislocated from each other
toward rotation direction of the rotor 110, i.e. the driving motor
100. In addition, in FIG. 8, the clutch body 610 is expressed by a
dot-and-dash line for the purpose of convenience.
[0082] Under a situation that the concave-convex parts 613a and
114a are dislocated from each other, the clutch body 610 does not
move to the first position, and the engaging flange part 613 is not
engaged with the engaged recess 114. Under such state, since
rotation of the driving motor 100 is accelerated more quickly under
the situation that the driving motor 100 formally rotates for
dewatering, a hidden danger exists that rotation of the driving
motor 100 is still accelerated to a rotation speed used for
dewatering under a state that the engaging flange part 613 cannot
be engaged with the engaged recess 114. In this way, since rotation
of the driving motor 100 is incorrectly transmitted to the drum
shaft 300, a hidden danger of incorrect dewatering of the washings
exists as the drum 22 incorrectly rotates.
[0083] Additionally, when switching is carried out from the
first-shaft driving form to the second-shaft driving form, and the
clutch body 610 is pushed by the clutch lever 630 to move to the
second position, all teeth of the rack 611 and all teeth of the
rack 514 are sometimes dislocated toward a circumferential
direction of the clutch body 610. Under such situation, the clutch
body 610 does not move to the second position, and the racks 611
and 514 cannot be engaged with each other. Therefore, in washing
and rinsing, when the driving motor 100 formally rotates in a state
that the racks 611 and 514 are not engaged with each other, a
hidden danger of incorrect washing and rinsing of the washings
exists as the drum 22 incorrectly rotates.
[0084] Therefore, in the implementation manner, the control part
701 executes first-shaft switching treatment used for carrying out
switching from the second-shaft driving form to the first-shaft
driving form in good precision and executes second-shaft switching
treatment used for carrying out switching from the first-shaft
driving form to the second-shaft driving form in good precision.
The first-shaft switching treatment and the second-shaft switching
treatment are described in detail below.
[0085] FIG. 9 is a flow chart illustrating the first-shaft
switching treatment.
[0086] Before the first-shaft switching treatment is started, the
driving form of the driving unit 30 is the second-shaft driving
form, and the cam 652 of the clutch driving apparatus 650 is in the
second working state.
[0087] The control part 701 enables the torque motor 651 to rotate
(S101) when the first-shaft switching treatment is started. The
control part 701 judges whether the detection signal is output by
the first detection sensor 654 (S102). The control part 701 enables
the torque motor 651 to stop (S103) when the detection signal is
output by the first detection sensor 654 (S102: YES) in a way that
the cam 652 rotates until the cam shaft 653 is positioned at the
highest position. As described above, the clutch body 610 arrives
at the first position under a situation that the concave-convex
parts 613a and 114a are not dislocated from each other and the
engaging flange part 613 is engaged with the engaged recess 114. In
another aspect, the clutch body 610 does not arrive at the first
position under a situation that the concave-convex parts 613a and
114a are dislocated from each other and the engaging flange part
613 is not engaged with the engaged recess 114.
[0088] When the torque motor 651 is stopped, the control part 701
sets rotation speed of the driving motor 100 as a specified
pre-rotation speed and supplies driving current corresponding to
the pre-rotation speed to the driving motor 100 to enable the
driving motor 100 to pre-rotate (S104). The pre-rotation speed is
set as rotation speed slower than that when the driving motor 100
is enabled to formally rotate under the first-shaft driving form,
for example, rotation speed is about 20 rpm-30 rpm. Therefore, the
driving current supplied to the driving motor 100 when in
pre-rotation is less than that of the driving motor 100 when in
formal rotation.
[0089] The rotor 110 of the driving motor 100 slowly rotates. Under
a situation that the concave-convex parts 613a and 114a are
dislocated from each other, when the engaged recess 114 rotates
along with rotation of the rotor 110 until the concave-convex parts
613a and 114a are at the consistent position, the engaging flange
part 613 is engaged with the engaged recess 114. The clutch body
610 arrives at the first position.
[0090] The control part 701 stops the driving motor 100 (S106)
after the specified pre-rotation time (S105). The pre-rotation time
is set as time that enables the rotor 110 of the driving motor 100
to rotate for many times from a half time through rotation at the
pre-rotation speed. Since rotation angle of the rotor 110 of the
driving motor 100 is larger than an angle R corresponding to an
interval of the concave-convex part 114a of the engaged recess 114
shown in FIG. 8, even if dislocation of almost an interval is
generated between the concave-convex part 613a of the engaging
flange part 613 and the concave-convex part 114a of the engaged
recess 114, the engaging flange part 613 is also engaged with the
engaged recess 114.
[0091] So, the first-shaft switching treatment is ended. Then, the
control part 701 enables the driving motor 100 to formally rotate.
For example, under the situation of performing the dewatering
process under the first-shaft driving form, the control part 701
supplies driving current corresponding to a rotation speed used for
dewatering to the driving motor 100, so as to enable the driving
motor 100 to rotate.
[0092] FIG. 10 is a flow chart illustrating the second-shaft
switching treatment.
[0093] Before the second-shaft switching treatment is started, the
driving form of the driving unit 30 is the first-shaft driving
form, and the cam 652 of the clutch driving apparatus 650 is in the
first working state.
[0094] The control part 701 enables the torque motor 651 to rotate
(S201) when the second-shaft switching treatment is started. The
control part 701 judges whether the detection signal is output by
the second detection sensor 655 (S202). The control part 701
enables the torque motor 651 to stop (S203) when the detection
signal is output by the second detection sensor 655 (S202: YES) in
a way that the cam 652 rotates until the cam shaft 653 is
positioned at the lowest position. As described above, the clutch
body 610 arrives at the second position under a situation that the
racks 611 and 514 are engaged with each other. In another aspect,
the clutch body 610 does not arrive at the second position under a
situation that the racks 611 and 514 are dislocated from each other
and are not engaged with each other.
[0095] When the torque motor 651 is stopped, the control part 701
sets rotation speed of the driving motor 100 as a specified
pre-rotation speed and supplies driving current corresponding to
the pre-rotation speed to the driving motor 100 to enable the
driving motor 100 to pre-rotate (S204). The pre-rotation speed is
set as rotation speed slower than that when the driving motor 100
is enabled to formally rotate according to the second-shaft driving
form. Therefore, the driving current supplied to the driving motor
100 when in pre-rotation is less than that of the driving motor 100
when in formal rotation. The pre-rotation speed set according to
the second-shaft switching treatment can not only be equal to that
set according to the first-shaft switching treatment, but also be
different from that set according to the first-shaft switching
treatment.
[0096] The rotor 110 of the driving motor 100 slowly rotates. The
wing shaft 200 rotates along with rotation of the rotor 110.
Therefore, the planetary gears 430 rotate when the sun gear 410
rotates. Under a situation that the racks 611 and 514 are not
engaged with each other, both the internal gear 420 and the
planetary gear carrier 440 are in a rotation state; but since the
internal gear 420 is connected with the drum 22 and the planetary
gear carrier 440 is connected with the clutch body 610, a torque
required by rotation is smaller, namely, the planetary gear carrier
440 rotates along with rotation of the planetary gears 430. The
dislocated racks 611 and 514 are engaged with each other when the
clutch body 610 rotates along with rotation of the planetary gear
carrier 440. The clutch body 610 arrives at the first position.
[0097] The control part 701 stops the driving motor 100 (S206)
after the specified pre-rotation time (S205). The pre-rotation time
is set as time that enables the rotor 110 of the driving motor 100
to rotate for many times from a half time through rotation at the
pre-rotation speed. The pre-rotation time of the second-shaft
switching treatment can not only be equal to that of the
first-shaft switching treatment, but also be different from that of
the first-shaft switching treatment.
[0098] So, the second-shaft switching treatment is ended. Then, the
control part 701 enables the driving motor 100 to formally rotate.
For example, under the situation of performing the washing process
according to the second-shaft driving form, the control part 701
supplies driving current corresponding to a rotation speed used for
washing to the driving motor 100, so as to enable the driving motor
100 to rotate. Or, for example, under the situation of performing
the rinsing process according to the second-shaft driving form, the
control part 701 supplies driving current corresponding to a
rotation speed used for rinsing to the driving motor 100, so as to
enable the driving motor 100 to rotate.
[0099] <Effects of the Implementation Manner>
[0100] As described above, according to the described
implementation manner, in order to realize switching from the
second-shaft driving form to the first-shaft driving form, the
first-shaft switching treatment is executed after the clutch
mechanism part 600 is operated to move the clutch body 610 to the
first position, and the first-shaft treatment enables the driving
motor 100 to rotate to engage the unengaged engaging flange part
613 with the engaged recess 114. Therefore, when the clutch
mechanism part 600 is operated to move the clutch body 610 to the
first position, even if the dislocation between the engaging flange
part 613 and the engaged recess 114 is generated, the dislocation
can be eliminated, so that the engaging flange part 613 is engaged
with the engaged recess 114. Therefore, since switching from the
second-shaft driving form to the first-shaft driving form can be
carried out in good precision, rotation of the drum 22 and the
stirring body 24 is correctly carried out under the first-shaft
driving form, so as to carry out correct dewatering.
[0101] Further, according to the implementation manner, since the
machine is designed into the first-shaft switching treatment, the
driving motor 100 is enabled to rotate through the driving current
lower than that when the driving motor 100 rotates under the
first-shaft driving form after the first-shaft switching treatment,
thereby enabling the driving motor 100 to slowly rotate. Therefore,
the engaging flange part 613 is easily engaged with the engaged
recess 114, so as to improve switching precision.
[0102] Further, according to the implementation manner, in order to
realize switching from the first-shaft driving form to the
second-shaft driving form, the second-shaft switching treatment is
executed after the clutch mechanism part 600 is operated to move
the clutch body 610 to the second position, and the second-shaft
switching treatment enables the driving motor 100 to rotate to
engage the unengaged racks 611 and 514. Therefore, when the clutch
mechanism part 600 is operated to move the clutch body 610 to the
second position, even if the dislocation between the racks 611 and
514 is generated, the dislocation can be eliminated, so that the
racks 611 and 514 are engaged with each other. Therefore, since
switching from the first-shaft driving form to the second-shaft
driving form can be carried out in good precision, rotation of the
drum 22 and the stirring body 24 is correctly carried according to
the second-shaft driving form, so as to carry out correct washing
or rinsing.
[0103] Further, according to the implementation manner, since the
machine is designed into the second-shaft switching treatment, the
driving motor 100 rotates through the driving current lower than
that when the driving motor 100 rotates according to the
second-shaft driving form after the second-shaft switching
treatment, thereby enabling the driving motor 100 to slowly rotate.
Therefore, the racks 611 and 514 are easily engaged with each
other, so as to improve switching precision.
[0104] Further, according to the implementation manner, since the
machine is designed to detect the working state of the cam 652 by
the first detection sensor 654 and the second detection sensor 655,
the position of the clutch body 610 is indirectly detected.
Therefore, the driving form of the driving unit 30 can be switched
with no need of the sensors for directly detecting the position of
the clutch body 610 and the like.
[0105] <Change Example>
[0106] Although the implementation manner of the present disclosure
is described above, the present disclosure is not limited by the
above implementation manner. In addition, various changes can also
be made to the implementation manner of the present disclosure in
addition to the above description.
[0107] For example, in the above implementation manner, the
engaging flange part 613 is formed on the clutch body 610 and is
taken as the first engaging part, and the engaged recess 114 is
formed on the rotor 110 of the driving motor 100 and is taken as
the first engaged part. But, as long as the clutch body 610 and the
rotor 110 are engaged with each other, the clutch body 610 and the
rotor 110 can be fixed in a circumferential direction, regardless
of the structures of the first engaging part and the first engaged
part. In addition, in the above implementation manner, the rack 611
is formed on the clutch body 610 and is taken as the second
engaging part, and the rack 514 is formed on the bearing part 510
of the bearing unit 500 and is taken as the second engaged part.
However, as long as the clutch body 610 and the bearing part 510
are engaged with each other, the clutch body 610 and the rotor 110
can be fixed in a circumferential direction through engagement,
regardless of the structures of the second engaging part and the
second engaged part.
[0108] Further, in the above implementation manner, for the
first-shaft switching treatment and the second-shaft switching
treatment, the driving motor 100 is stopped after the pre-rotation
time. But, the pro-rotation may also be transferred to rotation
used for dewatering and washing without stopping the driving motor
100 after the pre-rotation time.
[0109] Further, in the above implementation manner, the drum shaft
300 is fixed on the internal gear 420, and the planetary carrier
shaft 441, i.e. the planetary gear carrier 440, is connected with
the clutch body 610. Therefore, in the second-shaft driving form,
when the wing shaft 200 rotates under a state that the planetary
gear carrier 440 is fixed by the clutch body 610, the planetary
gears 430 rotate around the own axis along with rotation of the sun
gear 410, and the internal gear 420 rotates at a rotation speed
slower than that of the sun gear 410. But, as shown in FIG. 11, a
structure that the drum shaft 300 is fixed on the planetary gear
carrier 440 may also be adopted. Under such situation, a shaft part
425, which protrudes backward from the drum shaft 300, of a top end
part 425a is arranged on the internal gear 420. Moreover, the
clutch body 610 is connected with the shaft part 425. Namely, the
clutch body 610 is connected with the internal gear 420 through the
shaft part 425. Further, the planetary gears 430 are changed to
only be provided with the first gear. In the second-shaft driving
form, when the wing shaft 200 rotates under a state that the
internal gear 420 is fixed by the clutch body 610, the planetary
gears 430 rotate around the own axis and revolve along with
rotation of the sun gear 410, and the planetary gear carrier 440
rotates at a rotation speed slower than that of the sun gear 410.
Therefore, the drum shaft 300 fixed on the planetary gear carrier
440 rotates.
[0110] Further, since the space between the teeth of the racks 611
and 514 is small, compared with the situation of switching from the
second-shaft driving form to the first-shaft driving form, the
situation that the racks 611 and 514 are not engaged with each
other is difficult to generate. Therefore, as long as the precision
of engagement of the racks 611 and 514 is high, for the
second-shaft switching treatment, the treatment from the step S204
to the step S206 used for enabling the driving motor 100 to
pre-rotate may also be omitted.
[0111] Further, in the above implementation manner, the drum 22
rotates by using the inclination axis inclining relative to the
horizontal direction as the center. But, the drum type washing
machine 1 may also adopt a structure that the drum 22 rotates by
using the horizontal axis as the center.
[0112] Further, although the drum type washing machine 1 of the
above implementation manner does not have the drying function, the
present disclosure can also be used for a drum type washing machine
with the drying function, i.e. a drum type washing and drying
machine.
[0113] Additionally, various changes can be appropriately made to
the implementation manner of the present disclosure within the
scope of the technological idea expressed within the scope of the
claims.
REFERENCE SIGNS
[0114] 10: housing; 20: outer tank; 22: drum; 24: stirring body
(rotating body); 24a: blade (protruding part); 30: driving unit
(driving part); 100: driving motor; 110: rotor; 114: engaged recess
(first engaged part); 200: wing shaft (first rotation shaft); 300:
drum shaft (second rotation shaft); 400: planetary gear mechanism;
410: sun gear; 420: internal gear; 430: planetary gear; 440:
planetary gear carrier; 500: bearing unit; 510: bearing part; 514:
rack (second engaged part); 600: clutch mechanism part; 610: clutch
body; 611: rack (second engaging part); 613: engaging flange part
(first engaging part); 650: clutch driving apparatus; 652: cam
(working body); 654: first detection sensor (state detection part);
655: second detection sensor (state detection part); 701: control
part.
* * * * *