Textiles: fluid treating apparatus – Machines – Combined
Reexamination Certificate
1999-01-20
2001-03-20
Stinson, Frankie L. (Department: 1743)
Textiles: fluid treating apparatus
Machines
Combined
C068S133000
Reexamination Certificate
active
06202451
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a power transmission apparatus of clothes washing machines.
2. Description of the Prior Art
The conventional art will be described with reference to the attached drawings. A conventional washing machine, as illustrated in
FIGS. 1
,
2
and
3
, includes a housing
1
, water supply means
8
disposed at the back of the housing
1
for supplying water to a washing/spin-dry tub
6
and drain means
9
disposed beneath the washing/spin-dry tub
6
for draining the water in the wash/spin-dry tub
6
out of the washing machine.
The water supply means
8
is arranged thereunder with detergent dissolving means
10
for dissolving detergent in the water to supply into an outer tub
2
and the wash/spin-dry tub
6
. The housing
1
is installed therein with the outer tub
2
, and the wash/spin-dry tub
6
is provided therein.
Agitating member
7
is disposed on the floor of the wash/spin-dry tub
6
so as to agitate and wash laundry by applying physical force thereto, simultaneously rotating right and left on receipt of power from power transmission means to make the water turbulent.
The out tub
2
is centrally mounted with a washing shaft
11
connected to the agitating member
7
and a spin dry shaft
12
connected to the washing/spin-dry tub
6
, and a bearing
13
a
is releasably and rotatably disposed between the washing shaft
11
and the spin-dry shaft
12
.
Furthermore, the outer tub
2
is provided at a bottom surface thereof with power generating means
3
for generating power to rotate the washing shaft
11
and the spin-dry shaft
12
, decelerating means
4
disposed underneath the power generating means
3
to decelerate a rotary speed transmitted from the power generating means
3
and power switching means
5
for cutting off the power transmitted to the spin-dry shaft
12
during washing and for connecting the power transmitted to the spin-dry shaft
12
during spin-dry process.
Here, the power generating means
3
consists of a stator
31
a,
a rotor
31
b,
a motor
31
, a motor shaft
32
, and upper and lower housing
33
and
34
for covering the motor
31
and the motor shaft
32
. The motor shaft
32
includes a ball bearing
14
disposed between a lower inner circumference thereof and an external peripheral surface of the spin-dry shaft
12
and a metal bearing
13
b
mounted between a lower inner circumference thereof and an external peripheral surface of the washing shaft
11
, thereby preventing transfer of rotation at the motor shaft
32
. The motor shaft
32
is meshed into a planetary gear
42
in order to transfer turning effect to a plurality of planetary gears
42
.
The decelerating means
4
is arranged with an internal gear
41
formed with teeth at an inner circumference thereof, a plurality of planetary gears
42
disposed at an inner circumference thereof to be meshed into the internal gear
41
and to rotate, an upper carrier
23
and a lower carrier
24
respectively disposed above and underneath the plurality gears
42
so as to connect a central shaft
42
a
of the planetary gears
42
and to allow the planetary gears
42
to rotate, and a cover
45
for covering external bottoms of each part.
Here, the lower carrier
44
is centrally coupled to a lower end of the washing shaft
11
by a serration method so as to be cooperatively rotated with the washing shaft
11
. The power switching means
5
includes a cam lever
51
rotatably coupled to one side of the upper and lower housings
33
and
34
at the power generating means
3
and having a cam
51
a
thereon, a clutch lever
52
seesawing around a hinge
52
a
according to rotation of the cam
51
a,
a lower clutch
54
integrally coupled to an upper surface of the motor shaft
32
, an upper clutch
53
connected at one end thereof to the clutch lever
52
and coupled to a periphery of the spin-dry shaft
12
by serration method for vertical movement and interrupting the power by a meshed operation with the lower clutch
54
, a gear lever
55
coupled at a right angle to a lower side of the cam lever
51
to cooperatively rotate according to rotation of the cam lever
51
, a first cam
56
meshed to one side of the gear lever
55
to cooperatively rotate and formed at an inner circumference thereof with a guide unit, a second cam
57
formed with a slant guide groove into which the guide unit of the first cam
56
is inserted so as to be vertically moved according to the rotation of the first cam
56
, and coil springs
58
and
59
respectively disposed at inner circumferences of the second cam
57
and the lower clutch
54
so as to be compressed and elongated during switch from washing stroke to spin-dry stroke. The internal gear
41
is formed at an upper surface thereof with an insertion groove
41
a
into which one side of the second cam
57
is inserted so as to restrain the rotation of the internal gear
41
by way of downward insertion of the second cam
57
during the washing stroke.
In the washing machine thus constructed, when a desired washing condition is selected and a power is applied during washing process, an adequate amount of water is supplied into the wash/spin-dry tub
6
, and when the supply of the water is completed, the motor
31
centrally disposed underneath the outer tub
2
begins to operate.
Successively, as illustrated in
FIG. 2
, the motor shaft
32
is rotated at a high speed according to operation of the motor
31
and the plurality of planetary gears
42
meshed into the lower end of the motor shaft
32
are rotated.
The lower carrier
44
connected to the central shaft
42
a
of the planetary gears
42
is then rotated to thereby rotate the washing shaft
11
centrally connected to the lower carrier
44
by the serration method.
At this time, the first cam
56
meshed into the gear lever
55
which cooperatively rotates underneath the cam lever
51
by way of the gear lever
55
is rotated at a predetermined circle, and successively, the guide unit of the first cam
56
moves along the guide groove at the second cam
57
. At the same time, the second cam
57
is moved downward according to sliding contact with the guide unit of the first cam
51
by resilient force of the coil spring
58
compressed at an inner side of the second cam
57
. By this, one side of the second cam
57
is inserted into the insertion groove
41
a
of the internal gear
41
to thereby restrain rotation of the internal gear
41
.
Successively, the washing shaft
11
is rotated at a reduced speed according to the planetary gears
42
and the lower carrier
44
which have been reduced in speed thereof because the internal gear
41
is fixed and is not rotated by the restraint of the second cam
57
. The agitating member
7
connected to the washing shaft
11
is then rotated reversibly left and right to perform the washing.
Meanwhile, along with the washing operation thus described, the cam
5
l
a
is rotated by activation of the cam lever
51
to cause the clutch lever
52
to seesaw around the hinge
52
a,
and successively, the upper clutch
53
connected to one side of the clutch lever
52
is upwardly moved to thereby release the meshed coupling with the lower clutch
54
and to prevent the power of the motor
31
from being transferred to the spin-dry shaft
12
.
After the washing thus described is executed, and a predetermined time lapses to complete the washing, the water is drained out, rinsings are performed several times and spin-dry stroke is started. When the spin-dry stroke is started, as illustrated in
FIG. 3
, the cam
51
a
is rotated by activation of the cam lever
51
and the clutch lever
52
seesaws around the hinge
52
a
to thereby move downward the upper clutch
53
connected to one side of the clutch lever
54
. Successively, the spin-dry shaft
12
coupled by the serration method to the inner circumference of the upper clutch
53
can receive rotation of the rotor shaft
32
.
When the motor shaft
32
is rotated at a high speed, so does the spin-dry shaft
12
, such that
Bae Sang-Chul
Park Choul-Woo
Bushnell , Esq. Robert E.
Samsung Electronics Co,. Ltd.
Stinson Frankie L.
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