JP3391336B2 - Washing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine in which washing and rinsing are performed by a stirring blade that rotates at a low speed and dehydration is performed by rotating a dehydration tub at a high speed.

[0002]

2. Description of the Related Art A conventional washing machine has a structure as shown in FIG. That is, in the main body 1, a receiving cylinder 3 suspended by a suspension 2 is arranged in order to prevent dehydration vibration, and in the receiving cylinder 3, a dehydrating tank 4 (hereinafter simply referred to as a dehydrating tank 4) also serving as a washing tub. ) Is rotatably accommodated.
The dehydration tub 4 is open at the top, and laundry can be loaded from above.

A pulsator 5 which is a kind of stirring blade for stirring laundry is rotatably arranged at the bottom of the dehydration tub 4, and a large number of holes are formed on the side surface of the dehydration tub 4. The upper end side of the dehydration shaft 7 is fixed to the center of the bottom of the dehydration tank 4, and the dehydration shaft 7 is supported by a bearing 6 provided at the center of the bottom of the receiving cylinder 3. The pulsator 5 having the center of rotation of the bottom of the dehydration tub 4 as the center of rotation has a washing shaft 9 arranged in the hollow portion of the dehydration shaft 7.
Is fixed at its upper end side, and the washing shaft 9 is pivotally supported by a bearing 8 provided in the hollow portion of the dehydration shaft 7 .

The lower end side of the washing shaft 9 is connected to the output side of the speed reduction mechanism 10, and a pulley is attached to the speed reduction mechanism input shaft 42 of the speed reduction mechanism 10, and is connected to the drive motor 12 via the belt 11. Further, a large diameter portion is provided below the reduction mechanism input shaft 42 of the reduction mechanism 10, and the diameter of the dehydration shaft 7 accommodating the reduction mechanism input shaft 42 above the large diameter portion is substantially the same as the diameter of the large diameter portion. I am trying. A spring spans the outer circumference of the large-diameter portion of the reduction mechanism input shaft 42 and the outer circumference of the dehydration shaft 7.
By winding the clutch 13 and widening the large-diameter side of the spring clutch 13 in the radial direction, the rotation of the reduction mechanism input shaft 42 is prevented from being transmitted to the dehydration shaft 7, and the large-diameter side of the spring clutch 13 is set to the radial direction. If you do not spread in the direction,
The rotation of the speed reduction mechanism input shaft 42 is transmitted to the dehydration shaft 7. Therefore, by the action of the spring clutch 13, the rotation of the drive motor 12 can be transmitted or not transmitted to the dehydration shaft 7.

With the above construction, the spring clutch 13 is switched to the non-transmission state in the washing / rinsing process.
The rotation of the drive motor 12 is not transmitted to the spin-drying shaft 7, but is transmitted only to the pulsator 5 via the speed reduction mechanism input shaft 42 , the speed reduction mechanism 10 and the washing shaft 9, and stirs or rubs the laundry. It gives mechanical power. In this way, the washing and rinsing of the laundry stored in the dehydration tub 4 proceeds.

In the dehydration process, the spring clutch 1
Since 3 is switched to the transmission state, the rotation of the drive motor 12 is transmitted to the dehydration tank 4 via the dehydration shaft 7 and the entire dehydration tank 4 is rotated. The laundry is pressed against the side surface of the dehydration tank 4 by the centrifugal force generated by the rotation of the dehydration tank 4, and the water content of the laundry that has been washed and rinsed is
Are squeezed out into the receiving cylinder 3 from a large number of holes provided on the side surface of the. Thus, the laundry is automatically dehydrated.

[0007]

However, in the washing machine having the above-mentioned conventional structure, the drive motor 12 transmits the power to the reduction mechanism 10 via the belt 11. Therefore, if a large mechanical force is applied to the laundry in order to increase the washing capacity or improve the washing power, the upper limit of the transmission torque due to changes in belt tension due to changes over time, such as belt slip, belt elongation, and belt breakage Therefore, the transmission torque corresponding to the large capacity cannot be obtained.

Further, in order to increase the transmission torque of the spring clutch 13, it is necessary to lengthen the winding length to increase the strength, so that a large volume below the main body 1 of the washing machine can be secured. Will end up. Therefore, the capacity of the spring clutch 13 increases in addition to the increase in the capacity of the dehydration tub 4 accompanying the increase in the capacity of the washing machine, which further promotes the size increase of the washing machine.

Further, since the heavy drive motor 12 and the speed reduction mechanism 10 are arranged in parallel below the receiving cylinder 3, the gravity center positions of the dehydration tank 4 , the receiving cylinder 3 and the like suspended inside the main body 1. However, the center of rotation of the dehydration tank 4 (dehydration shaft 7) is displaced. As a result, when the dehydration tub 4 performs the dehydration rotation, imbalance is likely to occur and rotational vibration becomes large.

SUMMARY OF THE INVENTION The present invention solves the problems of the conventional structure as described above, and an object thereof is to cope with an increase in the washing capacity and to suppress the occurrence of imbalance during dehydration.

[0011]

To accomplish the above object In order to achieve the above, the dewatering shaft for rotating the washing and dewatering tank rotates a stirring blade which is disposed in the washing and dewatering in the water tank, and wherein A washing shaft arranged coaxially with the spin-drying shaft, a drive motor for rotating the spin-drying shaft and the wash shaft, a clutch mechanism for switching the rotation of the drive motor to the rotation of the spin-drying shaft, and rotation of the drive motor. And a speed reducer for rotating the washing shaft by decelerating the drive motor and the speed reducer.
And the drive motor is circular.
A magnet mounting part that extends in the height direction is formed on the outer periphery of the board.
A bottomed cylindrical rotor having a space inside by providing
And a stator arranged on the outer peripheral side of the magnet.
The clutch mechanism is a shaft of the rotor of the drive motor.
Fixed clutch with multiple meshes on the outer peripheral side of the heart
Part, a movable clutch part that engages with the fixed clutch part,
And a drive unit, and includes the fixed clutch unit and the movable clutch.
The switch is provided in a space inside the bottomed cylindrical rotor.
By moving the movable clutch part in the vertical direction,
Switching the rotation transmission of the drive motor to the dehydration shaft
It was done.

According to this structure, since the speed reducing mechanism and the drive motor are located on the same axis, the center of gravity of the dehydration tank, the receiving cylinder and the like can be aligned with the rotation center of the dehydration tank, and at the time of dehydration. The occurrence of unbalance can be suppressed, and the belt can be eliminated, so that the problem due to the belt can be solved. In addition, the torque transmission part of the clutch mechanism
Since it is provided in the space inside the bottomed tubular rotor, the clutch mechanism can be made thin and compact, and it is possible to prevent a large volume below the main body of the washing machine.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The invention described in claim 1 of the present invention is such that the dehydration shaft for rotating the washing / dehydrating tub and the stirring blade arranged in the washing / dehydrating tub are rotated, and the dehydration is performed. A washing shaft arranged coaxially with the shaft; a drive motor for rotating the dehydration shaft and the washing shaft; a clutch mechanism for switching the rotation of the drive motor to transmit the rotation of the drive motor to the dehydration shaft; and rotation of the drive motor. A drive mechanism that reduces the speed of rotation of the washing shaft and rotates the washing shaft.
The drive motor is disk-shaped and is mounted on the shaft.
Provide a magnet mounting part that extends in the height direction on the outer periphery of
And a cylindrical rotor with a bottom having a space inside,
And a stator arranged on the outer peripheral side of the magnet.
The latch mechanism is located on the outer periphery of the rotor axis of the drive motor.
A fixed clutch portion having a plurality of meshes formed on the side;
Movable clutch part engaging with fixed clutch part, and drive part
And the fixed clutch part and the movable clutch part are
It is provided in a space inside the bottomed cylindrical rotor, and
By moving the dynamic clutch part in the vertical direction,
It is designed to switch the rotation transmission of the drive motor.
is there.

With this configuration, since the speed reducing mechanism and the drive motor are located on the same axis, the center of gravity of the dehydration tank, the receiving cylinder and the like can be aligned with the rotation center of the dehydration tank, and unbalance during dehydration is achieved. It is possible to suppress the occurrence of
Since the belt is not necessary, the problems caused by the belt can be solved. In addition, the torque transmission part of the clutch mechanism has a bottom.
Since the clutch mechanism is provided in the space inside the rotor, the clutch mechanism can be made thinner and smaller, and it is possible to prevent a large volume below the main body of the washing machine.

The invention according to claim 2 of the present invention is claim 1
In addition to the invention described, the clutch Organization is der that constitutes the rotation of the drive motor and the rotating force transmitting portion for transmitting the dewatering shaft, a drive unit for contacting or separating the rotational force transmitting portion
It

With this configuration, since the speed reducing mechanism and the drive motor are located on the same axis, the center of gravity of the dehydration tank, the receiving cylinder, etc. and the rotation center of the dehydration tank can be made to coincide with each other, and the imbalance during dehydration is unbalanced. It is possible to suppress the occurrence of
Since the belt is not necessary, the problems caused by the belt can be solved . In addition, since the clutch mechanism can be made thin and compact, it is possible to prevent a large volume below the main body of the washing machine from being taken.

The invention according to claim 3 of the present invention is the invention according to claim 2
In addition to the invention described above, the rotational force transmitting portion includes a fixed clutch portion formed on the rotor and a movable clutch portion that comes into contact with or separates from the fixed clutch portion by a drive portion of a clutch mechanism. The drive unit of the clutch mechanism makes contact with the fixed clutch unit during dehydration and separates it during washing .

With this configuration, during dehydration, the drive unit of the clutch mechanism brings the movable clutch into contact with the fixed clutch unit, and the washing shaft and the dehydration shaft rotate integrally with each other, whereby dehydration can be performed. Further, at the time of washing, since the movable clutch part is separated from the fixed clutch part, the spin-drying shaft does not rotate, while the washing shaft slows down by the speed reducing mechanism to increase the torque and rotate the stirring blade, Do washing and rinsing. As described above, in the case of washing and rinsing and the case of dehydration, the movable clutch is moved to switch the transmission to the dehydration shaft, and the fixed clutch portion provided in the rotor does not need to be moved, so that the rotor can be moved freely. There is no need to adopt a complicated configuration that

[0019]

EXAMPLES Example 1 Hereinafter, a first example of the present invention will be described. First,
The overall configuration of this embodiment will be described with reference to FIG. A suspension 22 is provided in the main body 21 to prevent dehydration vibration.
Is provided with a receiving cylinder 23, and a dehydrating tank 24 is rotatably arranged in the receiving cylinder 23. At the inner bottom portion of the dehydrating tank 24, a pulsator 2 which is a kind of stirring blade for stirring laundry is provided.
5 is rotatably arranged. The dehydration tub 24 is rotatably supported by a bearing 26 provided at the bottom of the receiving cylinder 23.
The pulsator 25 is fixed to the upper end side of the
It is fixed to the upper end side of a washing shaft 29 arranged coaxially with the dehydration shaft 27 in the hollow portion of the.

The washing shaft 29 is rotatably supported by a bearing 28 provided in the hollow portion of the dehydration shaft 27, and the lower end side of the washing shaft 29 is connected to the output side of the speed reduction mechanism 30. The drive motor 31 is attached to the speed reduction mechanism input shaft 42 of the speed reduction mechanism 30.

The drive motor 31 is disk-shaped and has a rotor 31a having a magnet mounting portion 31c extending in the height direction on the outer periphery thereof and a magnet attached to the outer periphery of the magnet mounting portion 31c so as to face each other. It is arranged on the outer peripheral side of the magnet of the rotor 31a and is composed of a stator 31b which gives a rotating magnetic field to the rotor 32a. The speed reduction mechanism input shaft 42 of the speed reduction mechanism 30 is connected to the rotation center of the rotor 31 a of the drive motor 31.

As shown in FIG. 2, the clutch mechanism 32 is composed of a rotational force transmitting portion for transmitting the rotational force of the drive motor 31 and a driving portion for contacting or separating the rotational force transmitting portion. Specifically, the rotational force transmitting portion includes a fixed clutch portion 32a formed in a part of the rotor 31a,
It is composed of a movable clutch portion 32b which comes into contact with and separates from the fixed clutch portion 32a, and a drive portion 32c which is constituted by a solenoid which moves the movable clutch portion 32b up and down to come into contact with and separate from the fixed clutch portion 32a. . In this embodiment, the fixed clutch portion 32a is connected to the rotor 3
It is configured as a part excluding the magnet of 1a, and the parts related to the rotor 31a and the parts related to the fixed clutch part are shared.

Further, as shown in FIG. 2, a rectangular through hole for connecting the speed reduction mechanism input shaft 42 is provided at the bottom of the fixed clutch portion 32a having a bottomed cylindrical shape, and the fixed clutch portion 32a is provided. A plurality of convex portions 41a extending radially from the through hole are formed on the inner bottom surface of the. Moreover, the convex portion 41a is provided on the outer peripheral side of the through hole, preferably from the inner peripheral surface side of the magnet mounting portion 31c toward the through hole so that the convex portion 41a is located on the outer peripheral side as much as possible. There is.

The movable clutch portion 32b has a bottomed cylindrical shape which is inserted inward from above the fixed clutch portion 32a, and a concave portion 41b extending radially is also formed on the outer bottom surface of the bottom portion, and this concave portion 41b is formed. 32a convex portion 41
The rotation of the fixed clutch portion 32a is transmitted to the movable clutch portion 32b side by engaging with a. An annular collar portion 41e is provided on the outer peripheral surface of the movable clutch portion 32b, and a lever portion 32d that moves up and down by a solenoid 32c is attached to the collar portion 4.
It is configured to contact the lower surface of 1e. Therefore, the movable clutch portion 32b provided with the flange portion 41e is also vertically moved by the vertical movement of the solenoid 32c.

As shown in FIG. 1, the movable clutch portion 32b is attached to the dehydrating shaft 27 extending downward (to the clutch mechanism side) integrally with the outer contour of the speed reducing mechanism 30.
As shown in FIG. 2, a plurality of grooves extending in the vertical direction are provided on the lower side of 7, while the movable clutch portion 32b is provided.
Is provided with a through hole through which the dehydration shaft 27 penetrates, and the through hole is provided with a plurality of convex portions that fit into the grooves of the dehydration shaft 27. Therefore, the movable clutch portion 32b can move up and down within the range where the groove of the dehydration shaft 27 is provided, and the rotational force of the movable clutch portion 32b is also transmitted to the dehydration shaft side.

Further, the inner bottom surface of the movable clutch portion 32b is provided with a plurality of convex portions 41c extending radially around the through hole of the dehydration shaft 27. On the other hand, a cutout portion 41d for locking the convex portion 41c of the movable clutch portion 32b is provided on the bottom surface of the case 19 accommodating the reduction gear mechanism 30, and when the movable clutch portion 32b moves upward, The convex portion 41c fits into the cutout portion 41d to prevent the movable clutch portion 32b from rotating.

The operation of this embodiment will be described below with reference to FIG. First, in the washing / rinsing process, the solenoid 32c is energized, and the generated magnetic force moves the movable clutch portion 32b in the thrust direction of the dehydration shaft 27, that is, upward, and the convex portion 41a of the fixed clutch portion 32a and the movable clutch portion 32a. The part 32b is disengaged from the recess 41b. Due to this disengagement, the rotational force of the rotor 31a of the drive motor 31 is transmitted to the washing shaft 29 via the speed reduction mechanism input shaft 42 and the speed reduction mechanism 30, and only the pulsator 25 is rotated, thereby washing the laundry. Stir and apply mechanical force by rubbing. In this way, the washing and rinsing of the laundry stored in the dehydration tub 24 proceeds.

When the washing process is completed, the dehydration process is automatically started. In this dehydration process, the water in the dehydration tub 24 is drained and, at the same time, the energization of the solenoid 32c is stopped.
At this time, the movable clutch portion 32b lowers the dehydration shaft 27 in the thrust direction by its own weight, and the convex portion 41a of the fixed clutch portion 32a and the concave portion 41c of the movable clutch portion 32b are engaged with each other.

Therefore, the rotor 31a and the dehydration shaft 27 are connected, the rotational force of the drive motor 31 is transmitted to the dehydration shaft 27, and the pulsator 25 and the dehydration tub 24 as a whole rotate together. The water content of the laundry that has been washed and rinsed by the centrifugal force generated by the rotation of the dehydration tank 24 is
Are squeezed out into the receiving cylinder 23 through a large number of holes provided on the side surface of the. Thus, the laundry is automatically dehydrated.

In this way, the laundry put into the dehydration tub 24 automatically completes the washing, rinsing and dehydration steps.

Next, measures against unbalance in the dehydration process will be described. In this embodiment, the reduction mechanism input shaft 42 of the reduction mechanism 30 and the rotor 31a of the drive motor 31 are directly connected. That is, the reduction mechanism 30 and the drive motor 31
Since they are located on the same axis, the dehydration tank 24, the receiving cylinder 23,
Further, the position of the center of gravity of the reduction mechanism 30 and the drive motor 31 attached below the receiving cylinder 24 and the rotation center of the dehydration tub 24 can be made to substantially coincide with each other, and the occurrence of imbalance during dehydration can be suppressed.

In the present embodiment, since the receiving cylinder 23 is suspended by the suspension 22, the center of gravity will shift if the speed reducing mechanism 30 and the drive motor 31 which are heavy objects are not on the same axis, and the dehydration tub 24 can be properly placed. Although it cannot be rotated, the dehydration tank 24 can be smoothly rotated in this embodiment.

Further, since the speed reduction mechanism 30 and the dehydration shaft 27 are directly rotated by the drive motor 31, the conventional belt becomes unnecessary, and belt slip and durability can be eliminated.

Further, since a part of the rotational force transmitting portion of the clutch mechanism, that is, the fixed clutch portion 32a is formed on the rotor 31a of the drive motor 31, the number of parts can be reduced and the assemblability can be improved. Since the clutch mechanism can be made thin and compact, it is possible to prevent the volume below the main body 21 of the washing machine from being large. In particular, in this embodiment, the rotor 31a has a bottomed cylindrical shape, and the convex portion 41 for transmitting the rotational force of the clutch mechanism is provided in the internal space of the rotor 31a.
Since a is provided, it is possible to reduce the thickness of the rotational force transmitting portion of the clutch mechanism, and it is possible to further prevent the volume below the main body of the washing machine from being large.

Further, the rotational force transmission between the fixed clutch portion 32a and the movable clutch portion 32b, which constitute the rotational force transmission portion of the clutch mechanism, is performed by the convex portion 41 provided on the outer peripheral side with respect to the center of the through hole.
Since it is performed by a and the concave portion 41b, even if the torque for rotating the dehydration shaft 27 attached to the through hole is increased,
The concave portion 41b and the convex portion 41a are not damaged.
That is, the position away from the through hole (the concave portion 41b, the convex portion 4
When the dehydration shaft 27 located in the through hole is rotated from the position (1a), the torque applied to the concave portion 41b and the convex portion 41a can be suppressed by the moment force, and damage to these can be prevented.

When the dehydration shaft 27 is rotated with a large torque, the fixed clutch portion 32a is used as described above.
Since the torque of the convex portion 41a and the concave portion 41c of the movable clutch portion 32b formed so as to be engaged with the convex portion 41a can be suppressed to a small value, the fixed clutch portion 32a and the movable clutch portion 32b are increased in size to increase in size. This can also be prevented, which contributes to a thinner clutch mechanism.

Further, in the present embodiment, as shown in FIG. 3 (a), during washing, the movable clutch portion 32b is moved by the solenoid 32c in the thrust direction of the dehydration shaft, that is, upward, and the convex portion of the fixed clutch portion 32a is moved. 41a is disengaged, while the convex portion 41c of the movable clutch portion 32b is the case 1
It engages with the notch 41d in the lower part of 9 and the rotation of the movable clutch part 32b is blocked. Since the case 19 is fixed below the receiving tube 23, the case 19 itself does not rotate.

Therefore, by rotating the washing shaft 29 in the left-right direction during washing, the pulsator 25 turns left-right and stirs the laundry. When the laundry is stirred, the dewatering tank 24 stirs the laundry. I try to rotate with the force. However, since the movable clutch portion 32b is locked by the cutout portion 41d of the case 19, the rotation of the dehydration shaft 27 that fits into the through hole of the movable clutch portion 32b is also prevented, and the detachment connected to the dehydration shaft 27 is prevented. The rotation of the water tank 24 is also blocked.

In this way, it is possible to prevent the dehydration tub 24 from rotating together during washing and rinsing, and to prevent deterioration of cleaning performance. Further, by making the movable clutch portion 32b also have the co-rotation preventing function of the dehydration tub 24, the co-rotation preventing mechanism of the dehydration tub is eliminated to improve the assemblability, and the upper surface side of the movable clutch portion is utilized. Since the mechanism for preventing co-rotation of the dehydration tank is provided, it does not hinder the reduction of the rotational force transmitting portion of the clutch mechanism.

In this embodiment, the rotor 31a and the fixed clutch portion 32a, which is the rotational force transmitting portion, are integrally provided, but it goes without saying that they may be configured separately.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. The same components as those in the above embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 4, the drive motor 31 is configured to include the speed reduction mechanism 30 therein. in this way,
By including the speed reduction mechanism 30 in the drive motor 31, the speed reduction mechanism 30 and the drive motor 31 can be arranged thinly even if they are coaxially arranged, and the volume below the main body 21 of the washing machine can be made large. It can also be suppressed.

[0043]

As described above, according to the present invention, since the speed reducing mechanism and the drive motor are located on the same axis, the center of gravity of the dehydration tank, the receiving cylinder and the like can be aligned with the rotation center of the dehydration tank. possible to suppress the generation of unbalanced at the time of dehydration
It is possible to do with the fixed clutch part of the clutch mechanism.
The dynamic clutch is installed in the space inside the bottomed cylindrical rotor.
Since the clutch mechanism can be made thinner and smaller, it is possible to prevent the volume below the main body of the washing machine from being large.

[Brief description of drawings]

FIG. 1 is a sectional view of a washing machine that is a first embodiment of the present invention.

FIG. 2 is an exploded perspective view around a clutch mechanism of the washing machine.

FIG. 3 is a cross-sectional view of a reduction mechanism and a drive motor of the washing machine and their peripherals.

FIG. 4 is a sectional view of a washing machine according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of a conventional washing machine

[Explanation of symbols]

21 body 23 Cage 24 dehydration tank 25 Pulsator (stirring blade) 27 Dehydration shaft 29 Washing axis 30 reduction mechanism 31 Drive motor 31a rotor 32 clutch 32a Fixed clutch (rotational force transmission part) 32b Movable clutch (rotational force transmission part) 32c solenoid (drive unit) 41a convex part 41b recess 41c Convex part (engagement part) 41d Notch (locking part)

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinichi Matsuda 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) Reference JP-A-9-10474 (JP, A) JP-A-7- 116379 (JP, A) JP-A-8-66581 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) D06F 1/00-51/02

Claims (3)

(57) [Claims] 1. A dehydration shaft for rotating the washing and dewatering tank rotates a stirring blade which is disposed in the washing and dewatering in the water tank, and,
A washing shaft arranged coaxially with the dehydration shaft, a drive motor for rotating the dehydration shaft and the washing shaft, a clutch mechanism for switching rotation of the drive motor to the rotation of the dehydration shaft, and a drive motor for the drive motor. A drive mechanism and a speed reducer for reducing the rotation and rotating the washing shaft.
The drive motor is arranged coaxially with the mechanism,
A magnet mounting part that is disk-shaped and extends in the height direction on its outer circumference
The bottomed cylindrical rod that has a space inside
And a stator arranged on the outer peripheral side of the magnet.
The clutch mechanism is a shaft of the rotor of the drive motor.
Fixed clutch with multiple meshes on the outer peripheral side of the heart
Part, a movable clutch part that engages with the fixed clutch part,
And a drive unit, and includes the fixed clutch unit and the movable clutch.
The switch is provided in a space inside the bottomed cylindrical rotor.
By moving the movable clutch part in the vertical direction,
Switching the rotation transmission of the drive motor to the dehydration shaft
The washing machine. 2. A clutch Organization includes a rotating force transmitting portion for transmitting the rotation of the drive motor to the dewatering shaft, a washing machine according to claim 1, wherein configured in a drive unit for contacting or separating the rotational force transmitting portion. 3. The rotational force transmitting portion includes a fixed clutch portion formed on the rotor, and a movable clutch portion that comes into contact with or separates from the fixed clutch portion by a drive portion of a clutch mechanism, and the movable clutch portion comprises: The washing machine according to claim 2, wherein the drive unit of the clutch mechanism makes contact with the fixed clutch unit during dehydration and separates during washing.