JP2001062182A - Drive unit for washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To half-automatically wash laundry, discharge water, rinse it, and spin it dry by a single tub type washing machine by closing a discharge groove in an outer tub and braking a washing and spinning tub so as to wash it in a selection mode and by opening the discharge port in the outer tub and releasing the braking of the wash and spinning tub so as to spin the laundry in discharge mode. SOLUTION: In washing, a mode selection knob 41 is set on a cleaning mode side, water is fed to an outer tub 22, and at the same time laundry and detergent are put in a washing and spinning tub 23. When a washing time and a washing water flow selection knobs 51, 57 are operated, a power supply is fed to a motor 25 to wash the laundry. When the mode selection knob 41 is set to the discharge mode side in spinning, a cam is interlocked therewith to be fixed to a fixed bar, a hood latch cable 93 holds a brake lever 170 in the pulling state, the brake of the washing and spinning tank 23 is released, a discharge valve 30 connected to the brake lever 170 releases the discharge port 29. Then, when the spinning time selection knob 81 is operated, a power supply is fed to the motor to spin the laundry.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a washing machine,
More specifically, the present invention relates to a driving device for a washing machine that performs washing, drainage, rinsing, dehydration, and the like in a semi-automatic manner with a one-tub washing machine having a washing and dewatering tub in an outer tub.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 1, a two-tub washing machine is provided with a washing tub 2 and a dewatering tub 3 which are separately provided in a main body 1 of the washing machine. A pulsator 4 is provided on the surface, and a dehydration motor 5 and a washing motor 6 for driving the dehydration tub 3 and the pulsator 4 are provided.
Are provided on both sides of the lower end surface of the washing machine main body 1, respectively.

Further, an operation means 7 for selecting a washing time, a dehydration time and the like according to a user's operation is provided on one side of the upper part of the washing machine main body 1.

In the two-tub washing machine constructed as described above, when the washing time is set by operating the operating means 7 after the washing water, the laundry and the detergent are put into the washing tub 2, The washing is performed by the pulsator 4 being rotated forward and backward by the washing motor 6.

Further, when the laundry in the washing tub 2 is transferred to the dehydrating tub 3 and the operating means 7 is operated to set a dehydrating time, the dehydrating tub 3 is rotated at a high speed by the dehydrating motor 5 during the dehydrating time. Is used for dehydration.

On the other hand, as shown in FIG. 2, a normal fully automatic washing machine is hung down through a plurality of tension bars 11a in a washing machine main body 11 to prevent vibration during washing and spin-drying. An outer tub 12 for storing water is provided, and a washing and dewatering tub 13 is provided in the outer tub 12.

Further, a pulsator 14 is provided in the washing and dewatering tub 13 for generating a water flow in the washing water stored in the outer tub 12 to wash the laundry. Is the washing and dewatering tub 13 and the pulsator 1
A power transmission device 16 for transmitting a driving force of the motor 15 to the washing / dewatering tub 13 and the pulsator 14 is provided on one side of the motor 15.
Is provided.

In the fully automatic washing machine constructed as described above, when a user puts laundry into the washing and spin-drying tub 13 and selects a desired operation course and turns on the operation button, washing, drainage, Rinsing and dehydration are performed automatically.

[0009]

However, the two-tub washing machine constructed as described above has an inconvenience that the laundry must be transferred from the washing tub to the dehydrating tub after the washing is completed. The separate installation increases the volume of the washing machine, which not only limits the space when installing the washing machine, but also reduces the number of washing machines that can be loaded in the same container at the time of delivery. However, there was a problem that transportation costs increased.

[0010] Further, since the above-mentioned fully automatic washing machine performs washing, drainage, rinsing, dehydration, etc., in a fully automatic manner, it is equipped with various electric parts such as a water level sensor, a microcomputer, etc., thereby increasing the manufacturing cost. Not only
There has been a problem that it is difficult to maintain and repair due to a failure of the various electrical components.

[0011]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned various problems, and an object of the present invention is to provide a single-tub washing machine in which an outer tub is provided with a washing and dewatering tub. Washing, draining, rinsing, dewatering, etc. in a semi-automatic manner, which is not only extremely efficient compared to existing two-tank manual washing machines, but is also advantageous for installation and delivery due to the small volume of the washing machine. Accordingly, it is an object of the present invention to provide a washing machine driving device capable of removing a cause of a failure of the washing machine and reducing manufacturing costs as compared with an existing fully automatic washing machine.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, a driving device for a washing machine according to the present invention comprises a washing and dewatering tub provided in an outer tub, In a washing machine having a pulsator provided on a bottom surface and a power transmission means for transmitting a driving force of a motor to the washing / dewatering tub and the pulsator, a switch for selecting a washing mode or a drain mode, and the washing mode is set by the switch. Is selected, the drain port of the outer tub is closed and the washing and dewatering tub is braked. When the drain mode is selected by the switch, the drain port of the outer tub is opened and the braking of the washing and dewatering tub is released. Draining and braking means, a first timer for selecting a washing time and a washing water flow, a second timer for selecting a spin-drying time, and a washing mode selected by the switch. Then, power is supplied through the switch and the first timer, the motor is driven by the washing time and the washing water flow selected by the first timer to perform washing, and when the drain mode is selected by the switch. And a motor driving means for supplying power through the switch and a second timer to drive the motor during the dehydration time selected by the second timer to perform dehydration. .

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

As shown in FIG. 3, in the washing machine according to the first embodiment of the present invention, a mode selection for selecting a washing mode or a drain mode in accordance with a user operation is provided on one side of an upper portion of the washing machine main body 21. A knob 41 for selecting a washing time, a knob 57 for selecting a washing water flow for selecting a washing water flow, and a knob 81 for selecting a dewatering time for selecting a washing water flow. Is provided.

Further, an outer tub 22 is provided in the main body 21 of the washing machine for storing washing water suspended by a plurality of tension bars 21a so as to prevent vibration during washing and spin-drying. Inside 22 is provided a washing and dewatering tub 23.

Further, a pulsator 24 is provided in the washing and dewatering tub 23 for washing the laundry by generating a water flow in the washing water stored in the outer tub 22. Is the washing and dewatering tub 23 and the pulsator 2
A power transmission device 26 for transmitting the driving force of the motor 25 to the washing / dewatering tub 23 and the pulsator 24 is provided on one side of the motor 25.
Is provided.

As shown in FIGS. 3 to 8, a cam 42 is provided on the bottom surface of the mode selection knob 41 and is coupled to the mode selection knob 41 and is interlocked with the mode selection knob 41. The cam 42 is connected to a brake lever 170 of the power transmission device 26 via a hood latch cable 93 supported by the washing machine main body 21 and the outer tub 22 by brackets 91 and 92.

Further, the hood latch cable 93 is formed at a predetermined angle (θ) so as to be smoothly operated, and an upper end thereof is supported by the washing machine main body 21 by a bracket 91, and a lower end thereof is formed by a bracket 92 to the outer tub. 22
Is supported on the lower surface of the device.

The predetermined angle (θ) is 90 ° or more, and the hood latch cable 93 has a core wire 95 reciprocating inside thereof and an inner skin 96 and an outer skin 97 on the outer periphery of the core wire 95. It comprises a spring 98 provided in an enclosed state, and a cover 99 which covers the inner skin 96, the outer skin 97 and the spring 98 at both ends.

A drain valve 30 for opening and closing a drain port 29 of the outer tub 22 is provided on one side of the bottom surface of the outer tub 22. The drain valve 30 is connected to the brake lever 170 via a connecting lever 31. It is connected to.

Further, a fixed bar 94 is provided on the door 90 of the washing machine.
Is formed, and when the mode selection knob 41 is rotated to the drainage mode side with the door 90 closed, the cam 42 is fixed and the mode selection knob 41 selects the drainage mode. When the door 90 is opened, it is detached from the cam 42 and the mode selection knob 41 is rotated to the washing mode side.

Further, as shown in FIG. 9, a pulley 114 is fixed to the lower end of the power transmission device 26 with respect to the outer periphery of the drive shaft 110 by a nut 112. A drive shaft coupling 116 is coupled to the upper side of the pulley 114 by strong fitting, and a gear case 120 is rotatable with respect to the outer periphery of the drive shaft 110 via a plurality of bushes 118 above the drive shaft coupling 116. It is provided in.

A drum 122 is rotatably provided at the upper edge of the gear case 120.
A driven shaft coupling 124 is rotatably coupled to an inner peripheral surface of an upper end of the driven shaft 22 by serration, and a washing and dewatering tub 23 is fixed to an upper end of the driven shaft coupling 124 via a plurality of bolts 126. .

A driven shaft 132 is rotatably provided on the inner periphery of the driven shaft coupling 124 via a plurality of bushes 130. The driven shaft 132 is disposed above the washing and dewatering tub 23 with respect to the outer periphery of the upper end of the driven shaft 132. Is provided with a pulsator 24 via a bolt 134, and an upper carrier 138 is rotatably connected to the outer periphery of the lower end of the driven shaft 132 by serration.

Further, a sun gear 140 is fixed to the upper end of the drive shaft 110, and a plurality of planet gears 142 are rotatably meshed on the outer periphery of the sun gear 140 at predetermined circumferential intervals. An inscribed gear 144 is formed on the inner periphery of the lower end of the drum 122 so that the plurality of planetary gears 142 are rotatably meshed.

Here, the plurality of planet gears 142 are interposed between the upper carrier 138 and the lower carrier 146, and are rotatably connected via shafts 148, respectively.

The intermediate height with respect to the outer circumference of the gear case 120 is the same as the inner circumference of the lower end of the lower housing 150 fixed to the outside of the bottom surface of the outer tub (not shown) and the ball bearing 152.
A one-way clutch bearing 154 is provided above the ball bearing 152 with respect to the outer periphery of the gear case 120.

Here, the one-way clutch bearing 154
Is fixed by a support member 158 via a bush 156 press-fitted on the outer periphery of the lower housing 1 by a plurality of bolts 160.
It is fixed to 50.

On the other hand, the lower housing 150 has
The upper end of the ball bearing 16 is located above the drum 122 with respect to the outer periphery of the driven shaft coupling 124.
The upper housing 168 is fixed integrally with the upper housing 168. A brake lever 170 is supported by a lever shaft 172 and a lever spring 174 so as to be rotatable left and right on a flange portion 150a on one upper end thereof. One end of a brake band 176 that is in contact with the outer periphery of the drum 122 is fixed to the notch 150b.

Here, one end of the brake band 176 passes through the notch 150b, and
0 is fixed to one side and the other side end is the cutout portion 150b.
And is hinged to the brake lever 170.

Further, a clutch spring 178 is provided on the outer periphery of the upper end of the drive shaft coupling 116 and the outer periphery of the lower end of the gear case 120, and a clutch holder 180 is provided on the outer periphery of the clutch spring 178. Is provided with a sleeve member 184 via a brake ring 182.

At this time, the clutch spring 178 has one end connected to the gear case 120 and the other end connected to the clutch holder 180.

A clutch lever 186 is provided on one side of the sleeve member 184 via a connecting lever 188 and is linked to the brake lever 170. One side of the clutch lever 186 is supported on one side of the lower housing 150. Lever shaft 172a and lever spring 174
a rotatably supports left and right.

Next, the operation and effects of the driving device for a washing machine according to the first embodiment of the present invention configured as described above will be described in detail.

At the time of washing, power is applied to the washing machine to rotate the mode selection knob 41 to the washing mode side. Then, a fixed amount of water is supplied to the outer tub 22 of the washing machine, and the laundry and the detergent are simultaneously washed. The washing time and the washing flow are selected by operating the knobs 51 and 57 for selecting the washing time and the washing flow, respectively.

When the mode selecting knob 41 is rotated to the washing mode side as described above, and the washing time and the washing water flow are selected by the washing time and washing water flow selecting knobs 51 and 57, the motor is driven by the washing time and the washing water flow. Power is supplied to 25 to perform washing.

At this time, as described above, the mode selection knob 4
When the knob 1 is rotated to the washing mode side, the cam 42 interlocking with the mode selection knob 41 also rotates, whereby the hood latch cable 93 connected to the cam 42 is loosened and the brake lever 170, which is pulled while loosening, can be freely moved. As a result, the washing / dewatering tub 23 is braked by the spring provided on the brake lever 170 and the drain valve 30, and the drain valve 30 closes the drain port 29 of the outer tub 22.

Further, when power is applied to the washing machine at the time of spin-drying and the mode selection knob 41 is rotated to the drain mode, a cam 42 interlocking with the mode selection knob 41 is formed on the door 90 of the washing machine. Since the hood latch cable 93 is fixed to the fixing bar 94 and is held in a state where the brake lever 170 is pulled, the braking of the washing / dehydrating tub 23 is released and the brake lever 170 is connected to the brake lever 170 via the connecting lever 31. The drain valve 30 connected to the outer tub 2
2 is opened.

Next, when the dehydration time is set by operating the dehydration time selection knob 81, the motor 25 is driven during the dehydration time.
Is supplied with power to perform dehydration.

On the other hand, when the door 90 of the washing machine is opened during the dehydration as described above, the fixed bar 94 formed on the door 90 of the washing machine is detached from the cam 42, and the mode selection knob 41 can be freely turned. As a result, the washing / dehydrating tub 23 is braked and the drain valve 30 closes the drain port 29 of the outer tub 22 because the brake lever 170 and the spring provided on the drain valve 30 rotate to the washing mode due to the elasticity of the spring. .

As shown in FIG. 10, in a washing machine according to a second embodiment of the present invention, a mode selector for selecting a washing mode or a drainage mode in accordance with a user operation is provided on one upper side of a washing machine main body 21. A knob 41, a washing time selecting knob 51 for selecting a washing time, a washing water flow selecting knob 57 for selecting a washing water flow, and a spinning time selecting knob 81 for selecting a spinning time are provided. Have been.

Further, an outer tub 22 is provided in the main body 21 of the washing machine for storing washing water suspended by a plurality of tension bars 21a so as to prevent vibration during washing and dehydration. Inside 22 is provided a washing and dewatering tub 23.

Further, a pulsator 24 is provided in the washing / dewatering tub 23 for washing the laundry by generating a water flow in the washing water stored in the outer tub 22. Is provided with a motor 25 for rotating the washing and dewatering tub 23 and the pulsator 24. A power transmission for transmitting a driving force of the motor 25 to the washing and dewatering tub 23 and the pulsator 24 on one side of the motor 25. Device 2
6 are provided.

Further, as shown in FIGS. 10 and 11,
A solenoid 70 is provided on one side of the bottom surface of the outer tub 22, and the solenoid 70 is connected to a brake lever 170 of the power transmission device 26 via a connecting lever 27. On the side is the drain port 2 of the outer tank 22
A drain valve 30 for opening and closing the drain valve 9 is provided.
0 is the brake lever 170 via the connecting lever 31
It is connected to.

On the other hand, FIG. 12 is a circuit diagram of a driving device for a washing machine according to a second embodiment of the present invention, which includes a mode selection switch 40, a washing time and washing water flow selection timer 50, and a door switch. 60, a solenoid 70, a dehydration time selection timer 80, and a motor drive circuit 90.

The mode selection switch 40 is switched in accordance with the user's operation, and the washing time and the washing water flow selection timer 50 or the door switch 60 and the solenoid 7 are selected.
0 and a dehydration timer 80, and the washing time and washing water flow selection timer 50 selects a washing time and a washing water flow according to a user's operation, and the power is supplied according to the selected washing time and washing water flow. Is supplied to the motor drive circuit 90, and the door switch 60 is turned off when the washing machine door is opened to shut off the power supplied to the solenoid 70 and the dehydration time selection timer 80. I have.

When the mode selection switch 40 is switched to the drain mode and the door switch 60 is turned on, the power is supplied to the solenoid 70 through the mode selection switch 40 and the door switch 60, and FIGS. The brake of the washing and dewatering tub 23 is released by pulling the brake lever 170 shown in FIG. 4 and the drain valve 30 is operated via the connecting lever 31 to open the drain port 29 of the outer tub 22.

When the mode selection switch 40 is switched to the washing mode side or the door switch 60 is turned off, the solenoid 70 returns to the original position by the elasticity of a spring (not shown) while returning to the original position. By releasing the brake lever 170 shown in FIG.
And the drain valve 3 is connected via the connecting lever 31.
0 is operated to close the drain port 29 of the outer tub 22.

Further, the dehydration time selection timer 80 selects a dehydration time in accordance with a user operation, and supplies power to the motor drive circuit 90 during the selected dehydration time. Is supplied with power through the washing time and washing water flow selection timer 50 or the dehydration time selection timer 80 to drive a motor to perform washing or dehydration. The starting capacitor (C) and the positive rotation winding (ML) and a reverse rotation winding (MR).

As shown in FIG. 13, when the washing time selecting knob 51 is rotated to select the washing time, the washing time and water flow selecting timer 50 is provided on the bottom surface of the housing via the transmission gear group 54. A spring (not shown) is wound around the transmission gear group 54 while the wound spring is released.
, The washing time selection knob 51 gradually returns to the original position.

As described above, when the washing time selection knob 51 returns to the original position, the first terminal 53a of the two-terminal switch 53 is inserted into the groove of the disk 52 interlocked with the washing time selection knob 51. Then, the two-terminal switch 53 is turned off, and the power supplied to the motor drive circuit 90 is cut off.

Further, the transmission gear group 54 and the cam 55a
The second terminal 56b of the three-terminal switch 56 reciprocates via the rod 55b and is selectively connected to the first terminal 56a or the third terminal 56c. Since the power is selectively supplied to the ML) or the reverse winding (MR), the motor reverses the forward / reverse rotation to generate the washing water flow.

Further, by rotating the washing water flow selection knob 57, the moving member 58 is slid along the guide rail 59 and the three-terminal switch 56 is moved.
The interval between the first terminal 56a and the third terminal 56c is changed in multiple stages, and the cycle at which the second terminal 56b is connected to the first terminal 56a or the third terminal 56c is changed. Therefore, the forward / reverse rotation cycle of the motor is adjusted.

Next, the operation and effect of the driving device for a washing machine according to the second embodiment of the present invention configured as described above will be described in detail with reference to FIG.

At the time of washing, power is applied to the washing machine, and then the mode selection switch 40 is switched to the washing mode (S
1, S2).

Next, a predetermined amount of water is supplied to the outer tub 22 of the washing machine, and laundry and detergent are put into the washing / dehydrating tub 23, and the washing time and the washing water flow selection timer 50 are operated to operate the washing machine. Select time and washing water flow (S3, S4).

As described above, the mode selection switch 40
When the washing time and the washing water flow are selected by the washing time and washing water flow selecting timer 50, the motor driving circuit 9 is switched through the mode selecting switch 40 and the washing time and washing water flow selecting timer 50.
0 is supplied with power and the washing is performed according to the washing time and the washing water flow (S5, S6, S7).

At this time, as described above, when the mode selection switch 40 is switched to the washing mode, the solenoid 70
Since no power is supplied to the brake lever 176, the brake lever 176 connected to the solenoid 70 via the connecting lever 27 becomes free, and the washing and dewatering tub 23 is braked and connected to the brake lever 176 via the connecting lever 31. The drain valve 30 closes the drain port 29 of the outer tub 22.

On the other hand, at the time of spin-drying, power is applied to the washing machine, and then the mode selection switch 40 is switched to the drain mode (S1, S2).

As described above, the mode selection switch 40
Is switched to the drain mode, power is supplied to the solenoid 70, and the solenoid 70 is
The brake lever 176 connected to the connecting lever 3 is pulled to release the braking of the washing and dewatering tub 23, and the connecting lever 3
The drain valve 30 connected to the brake lever 176 through 1 opens the drain port 29 of the outer tub 22 (S8).

Next, when the dehydration time selection timer 80 is operated to set the dehydration time, the dehydration time selection timer 8 is set.
0, power is supplied to the motor drive circuit 100 to perform dehydration during the dehydration time (S9 to S13).

On the other hand, as described above, when the door of the washing machine is opened during spin-drying, the door switch 60 is turned off and the power supply to the solenoid 70 is supplied to the solenoid 70 in the same manner as when the mode selection switch 40 is switched to the washing mode. Is not supplied, the brake lever 176 connected to the solenoid 70 via the connection lever 27 becomes free, and the washing and dewatering tub 23 is braked, and is connected to the brake lever 176 via the connection lever 31. The drain valve 30 closes the drain port 29 of the outer tub 22 (S14, S15).

[0063]

As described above, according to the present invention, the washing, draining, rinsing, dehydrating, etc. are carried out in a semi-automatic manner by a one-tub washing machine having a washing and dewatering tub in the outer tub. Not only is it more traditional than the two-tub manual washing machine,
Since the volume of the washing machine is small, it is advantageous for installation and delivery of the washing machine. In addition, the number of various electrical components is smaller than that of the existing fully automatic washing machine. There is an excellent effect that can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of a general two-tub washing machine.

FIG. 2 is a schematic longitudinal sectional view of a general fully automatic washing machine.

FIG. 3 is a schematic sectional view of the washing machine according to the first embodiment of the present invention.

FIG. 4 is a schematic sectional view of a mode selection knob shown in FIG. 3;

FIG. 5 is a schematic plan view showing a state in which the mode selection knob shown in FIG. 3 is rotated to the washing mode side.

FIG. 6 is a schematic plan view showing a state in which the mode selection knob shown in FIG. 3 is rotated to the drain mode side.

FIG. 7 is a schematic bottom view of the washing machine shown in FIG. 3;

8 is an enlarged sectional view of the hood latch cable shown in FIG.

FIG. 9 is a sectional view showing a power transmission device for a washing machine according to the present invention.

FIG. 10 is a schematic longitudinal sectional view of a washing machine according to a second embodiment of the present invention.

FIG. 11 is a plan view showing a power transmission device for a washing machine according to a second embodiment of the present invention.

FIG. 12 is a circuit diagram of a driving device for a washing machine according to a second embodiment of the present invention.

FIG. 13 is a plan view showing a washing time and a washing water flow selection timer shown in FIG. 6;

FIG. 14 is an operation sequence diagram of the driving device of the washing machine according to the present invention.

[Explanation of symbols]

 Reference Signs List 30 drain valve 31 connecting lever 40 mode selection switch 41 mode selection knob 42 cam 50 washing time and washing water flow selection timer 60 door switch 70 solenoid 80 dehydration time selection timer 90 door 91 bracket 93 hood latch cable 94 fixing bar 100 Motor drive circuit 170 Brake lever

 ──────────────────────────────────────────────────続 き Continued on the front page (31) Priority claim number 199957071 (32) Priority date December 13, 1999 (Dec. 13, 1999) (33) Priority claiming country South Korea (KR) (72) Inventor Park Cheol-soo 135-57 Gyuman-dong, Paldal-gu, Suwon-si, Gyeonggi-do, Republic of Korea No. 401 Hyundai Heights Villa F-term (reference) 3B155 AA01 AA18 BB05 BB06 CA06 CB06 FC03 HB09 JA12 JC12 KA31 LA02 LA14 LB15 LB22 LB30 MA01 MA02 MA06 MA09

Claims (9)

[Claims] 1. A washing and dewatering tub provided in an outer tub, and a pulsator provided on the bottom surface of the washing and dewatering tub and a power transmission means for transmitting a driving force of a motor to the washing and dewatering tub and the pulsator. A washing machine provided with a switch for selecting a washing mode or a drain mode, and when the washing mode is selected by the switch, the drain port of the outer tub is closed and the washing and dewatering tub is braked, and the drain is drained by the switch. When the mode is selected, drainage and braking means for opening the drainage port of the outer tub and releasing braking of the washing and dewatering tub, a first timer for selecting a washing time and a washing water flow, and selecting a dehydrating time Second to do
When the washing mode is selected by the timer and the switch, power is supplied through the switch and the first timer, and the washing is performed by driving the motor according to the washing time and the washing water flow selected by the first timer. When the drain mode is selected by the switch, a motor driving unit that is supplied with power through the switch and a second timer and drives a motor to perform dehydration during the dehydration time selected by the second timer. A driving device for a washing machine, comprising: 2. The washing machine according to claim 1, further comprising a door switch for shutting off power supplied to the drainage and braking means and a second timer when a door of the washing machine is opened. A driving device for the washing machine according to the above. 3. The drainage and braking means is rotated in accordance with a user operation to select a washing mode or a drainage mode, a cam that rotates in conjunction with the knob, and a drain port of the outer tub. A drain valve for opening and closing the valve, and the cam and the drain valve are connected at both ends thereof, and the mode selection knob is rotated to the washing mode side to close the drain valve. The driving device for a washing machine according to claim 2, further comprising a hood latch cable that opens the drain valve when rotated to the side. 4. The washing machine according to claim 3, wherein the hood latch cable is supported on the body and the outer tub of the washing machine by brackets so that both ends thereof form a predetermined angle (θ). Drive. 5. The driving device for a washing machine according to claim 4, wherein the predetermined angle (θ) is 90 ° or more. 6. The hood latch cable includes a core wire that reciprocates with the rotation of the cam, a spring provided on the outer periphery of the core wire, and a cover that covers both ends of the spring. The driving device for a washing machine according to claim 3, wherein: 7. When the mode selection knob is rotated to the drain mode with the door closed, the cam is fixed so that the mode selection knob holds the drain mode selected. The driving device of a washing machine according to any one of claims 3 to 6, further comprising a fixing bar formed on the door. 8. The mode according to claim 7, wherein the fixing bar is detached from the cam when the door is opened, and the mode selection knob is rotated to the washing mode side. Washing machine drive. 9. The drainage and braking means includes a solenoid operated by being supplied with power through the switch and the door switch, a brake lever operated by the solenoid to brake or release the washing and dewatering tub, and the brake lever The driving device for a washing machine according to claim 1, further comprising: a connecting lever interlocked with the connecting lever and a drain valve operated by the connecting lever to open and close a drain port of the outer tub.