JP2001204990A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of an unbalance in dewatering process and reduce the moment generated by the unbalance of a dewatering tank to obviate the need for perticularly enhancing the strength of the bearing for a dewatering machine shaft and the bearing case. SOLUTION: A reduction mechanism 31, a clutch mechanism 34, a driving motor 33 are located on the same axial line. The distance from the bearings 26 upper than the distance between two bearings (26, 26) pivotally supporting the dewatering machine shaft 27 to a mounting flange for the dewater tank at the mounting position of the dewater tank 24 is made short.

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 of clothes used in ordinary households are performed by a stirring blade rotating at a low speed, and spin-drying is performed by high-speed rotation of a spin-drying tub.

[0002]

2. Description of the Related Art A conventional fully automatic washing machine has been known as shown in FIG. That is, a receiving cylinder 3 supported by a suspension 2 is provided in the main body 1, and a dehydrating tub 4 (hereinafter, simply referred to as a dehydrating tub 4) also serving as a washing tub is provided in the receiving cylinder 3. The dewatering tub 4 has an open top so that laundry can be put in from the top. Dewatering tank 4
Is provided with a shape of a hole to be fitted in a portion of the dewatering shaft 5 which is obtained by shaving the four surfaces, and is screwed.
The dewatering tub 4 is secured with a nut 6. Further, a stirring blade 7 is provided at the bottom of the dewatering tank 4 and a large number of holes are provided on the side surface.

The dewatering tub 4 is provided with a bearing 8 provided on the bottom of the receiving cylinder 3.
Fixed to a dehydrating shaft 5 supported by the The stirring blade 7 is fixed to a washing shaft 10 supported by a bearing 9 inside the dewatering shaft 5. This washing shaft 10
Is connected to a speed reduction mechanism 11, and a rotor 13a of a drive motor 13 is connected to the speed reduction mechanism input shaft 12. The drive motor 13 includes a rotor 13a and a stator 13b provided to face a magnet provided on the outer periphery of the rotor 13a. The rotor 13a is rotated by a rotating magnetic field of the stator 13b. Rotor 13 of reduction shaft input shaft 12
The mounting portion of a was shaved on four sides, and the mounting hole of the rotor 13a was formed into a shape that fits the hole, thereby transmitting the rotational force of the rotor 13a. Further, the reduction mechanism input shaft 12 has a spring clutch mechanism 14 for switching the rotation of the drive motor 13 to the washing shaft 10 or the dehydrating shaft 5 for transmission.

The spring clutch mechanism 14 has a clutch input boss 14a and a clutch spring 14b each having a shape of a hole that fits into a portion of the speed reduction mechanism input shaft 12 obtained by cutting the four surfaces, and bends the ends of the clutch spring 14b. Control claw portion 14c, a release sleeve 14d provided with a notch into which the control claw portion 14c fits, a clutch driving means 14f engaged with a stopper 14e of the release sleeve 14d, and a dehydrating shaft 5 around which the clutch spring 14b is wound. It is composed of a clutch output boss 14g.

[0005] With the above construction, the clutch driving means 1 of the spring clutch mechanism 14 is used in the agitating washing / rinsing process.
4f is engaged with the stopper 14e of the release sleeve 14d, and the control claw 14c provided by bending the end of the clutch spring 14b is fixed, so that the clutch spring 14b cannot be wound around the clutch input boss 14a. Dewatering shaft 5 even if part 14a rotates
Cannot transmit the rotation to the clutch output boss portion 14g. The rotation of the drive motor 13 is only transmitted to the stirring blade 7 via the washing shaft 10 and gives a mechanical force to the laundry. Thus, the washing and rinsing of the laundry stored in the dewatering tub 4 proceeds.

In the dewatering process, the clutch driving means 14f of the spring clutch mechanism 14 is moved to the release sleeve 1
4d of the stopper 14e is disengaged from the stopper 14b, and the control claw 14 is formed by bending the end of the clutch spring 14b.
When c is released, the clutch spring 14b winds around the clutch input boss 14a.
4a, the clutch output boss 14 of the dehydrating shaft 5 is rotated.
Transmit the rotation to g. The rotation of the drive motor 13 is the
, And is transmitted to the dehydration tub 4 only through the rotation of the dehydration tub 4. The water content of the laundry that has been stirred and washed and rinsed by the rotation of the spin-drying tub 4 is squeezed out into the receiving cylinder 3 from a large number of holes provided on the side surface of the spin-drying tub 4 by centrifugal force. Thus, the laundry is automatically dehydrated.

The rotating shaft of the drive motor 13 and the dewatering tank 5
By disposing on the same axis as the rotation center of the dehydration tank 5,
The position of the center of gravity of the receiving cylinder 3 and the like and the position of the center of gravity of the drive motor 13 are made substantially coincide with each other, so that the effect of suppressing imbalance particularly during dehydration can be exhibited.

[0008]

However, in the washing machine of the above-mentioned conventional construction, the mounting portion between the dewatering tub 4 and the dewatering shaft 5 has a shape of a hole that fits into a part of the dewatering shaft 5 which is formed by cutting the four surfaces. Are provided in the dewatering tub 4 and fitted, and a nut 6 is attached to a screw portion formed on the dewatering shaft 5 to prevent the dewatering tub 4 from coming off.
In order to transmit the rotational force with the structure fixed with the nut 6,
The fitting portion needs to have a length in the axial direction, and is separated from the upper bearing 8 supporting the dewatering shaft 5. Therefore, when an imbalance occurs due to the laundry in the dewatering tub 4, the force applied to the bearing 8 increases. If the dewatering tub 4 is deepened to increase the washing capacity, the drive motor 13 is too close to the floor, so that it is necessary to reduce the distance between the bearings.
In addition, the strength of the mechanical case 15 must be increased.

The present invention solves such a conventional problem.

[0010]

According to the present invention, in order to solve the above-mentioned problems, a speed reduction mechanism, a clutch mechanism, and a drive motor are located on the same axis, and the distance between the bearings supporting the dewatering shaft is higher. The distance from the bearing to the mounting position of the dewatering tank was shortened.

In addition, it is possible to suppress the occurrence of unbalance during dehydration, reduce the moment force generated by the unbalance of the dehydration tub, and not particularly increase the case strength of the dehydration shaft bearing or the dehydration shaft bearing. is there.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention described in claim 1 is characterized in that a dewatering shaft composed of a plurality of components for rotating a dewatering tub, a stirring blade disposed in the dewatering tub are rotated, and the shaft is coaxial with the dewatering shaft. A washing shaft, a dehydrating shaft, a driving motor for rotating the washing shaft, a deceleration mechanism for decelerating the rotation of the driving motor to rotate the washing shaft, and transmitting or not transmitting the rotation of the driving motor to the dehydrating shaft. A washing machine having a clutch mechanism, a receiving cylinder enclosing the spin-drying tub, a flange for fixing the spin-drying tub to the spin-drying shaft, and a plurality of bearings supporting the spin-drying shaft. In addition to being arranged coaxially, the clutch is included in the drive motor, and the distance from the bearing above the distance between the upper and lower bearings supporting the dehydrating shaft to the position where the dewatering tank is mounted is shortened.

According to this embodiment, the deceleration mechanism, the clutch mechanism, and the drive motor are located on the same axis, and the center of gravity of the dewatering tub and the receiving cylinder can be matched with the rotation center of the dewatering tub. As a result, the occurrence of imbalance during dehydration can be suppressed. In addition, the mounting position of the dewatering tub is not far from the bearing that supports the dewatering shaft, so the moment force generated by the imbalance of the dewatering tub can be reduced, and the case strength of the dewatering shaft bearing and the dewatering shaft bearing needs to be particularly strong. Absent.

According to a second aspect of the present invention, a ring-shaped edge is provided below the periphery of the dewatering tank mounting flange, and the tip of the seal portion of the dewatering shaft is located above the ring-shaped edge. By adopting this configuration as an embodiment, even when water is poured into the receiving cylinder and the dewatering shaft is submerged, the tip of the oil seal of the dewatering shaft can be prevented from being submerged, resulting in a stronger sealing structure.

According to a third aspect of the present invention, the dewatering shaft and the dewatering tub mounting flange are separate parts, and the tip of the dewatering shaft is projected from the dewatering tub mounting flange. By adopting this configuration as the embodiment, it is possible to suppress the center deviation from the dehydrating shaft and prevent the run-out during rotation. In addition, the accuracy can be improved more easily and at a lower cost than by integrally processing the dewatering shaft and the dewatering tank mounting flange. Furthermore, even if the distance between the shafts is shortened, the run-out is kept small, so that no extra strength is required for the case.

According to a fourth aspect of the present invention, a fitting portion between the dewatering tank mounting flange portion and the dewatering shaft is serrated and press-fitted. By adopting this configuration as an embodiment, the fitting length can be shortened, the interval between the mounting position of the dewatering tub and the bearing can be further reduced, and the moment force generated by imbalance of the dewatering tub can be reduced. There is no need to particularly increase the case strength of the shaft bearing.

According to a fifth aspect of the present invention, a seal structure is provided at a fitting portion between the dewatering tank mounting flange and the dewatering shaft. By adopting this configuration as an embodiment, even if there is a gap in the fitting portion between the dewatering tub mounting flange portion and the dewatering shaft, water does not pass through the dewatering shaft, and water can enter the deceleration mechanism. Absent. In addition, the workability when attaching the dewatering tank mounting flange to the dewatering shaft can be improved, and at the same time, the sealing performance can be improved.

According to a sixth aspect of the present invention, a foamable sealing material is used for the seal structure. By adopting this configuration as the embodiment, it is possible to improve the sealing performance of the fitting portion between the dewatering tub mounting flange and the dewatering shaft, and also to enhance the workability when mounting the dewatering tub mounting flange to the dewatering shaft.

According to a seventh aspect of the present invention, a sealing material injection port is provided in the dewatering tank mounting flange, and the injection port is located above the oil seal tip of the dewatering shaft. By adopting this configuration as the embodiment, the sealing material can be injected after the dewatering tank mounting flange and the dewatering shaft are assembled. Also, because the inlet is above the tip of the oil seal on the dehydrating shaft,
The oil seal of the dehydrating shaft is not damaged at the injection port at the time of assembling, and the sealing material does not adhere to the oil seal of the dehydrating shaft even after the assembling, and the sealing property is not deteriorated. In addition, it is possible to confirm that the user has forgotten the sealing operation.

[0020]

(Embodiment 1) Hereinafter, Embodiment 1 of the present invention will be described. Embodiment 1 is a preferred embodiment of the invention according to claim 1. FIG. 1 is a sectional view showing the overall configuration of the present embodiment. FIG. 2 is a detailed view of the dewatering tank mounting portion of the present embodiment. In the main body 21, a receiving cylinder 23 suspended by a suspension 22 is provided so as to prevent dehydration vibration,
A dewatering tub 24 is rotatably disposed in the receiving cylinder 23, and a stirring blade 25 for stirring the laundry is rotatably disposed at the inner bottom of the dewatering tub 24. The dewatering tub 24 includes a dehydration shaft 27 that is supported by a bearing 26 provided at the bottom of the receiving cylinder 23.
The stirring blade 25 is screwed to a dewatering tub mounting flange portion 35 provided at the upper end of the washing shaft 29, and the stirring blade 25 is disposed in the hollow portion of the dewatering shaft 27 so as to be coaxial with the dewatering shaft 27. Is fixed to the part.

The washing shaft 29 is supported by bearings 30 provided in the hollow portions of the washing shaft 29 and the dehydrating shaft 27, and the lower end of the washing shaft 29 is connected to the output side of the reduction mechanism 31. A drive motor 33 is attached to a speed reduction mechanism input shaft 32 of the speed reduction mechanism 31.

The driving motor 33 has a disk shape and has a magnet attachment portion 33a extending in the height direction on the outer periphery thereof, and a rotor 33b opposed to the magnet attached to the outer periphery of the magnet attachment portion 33a. And a stator 33c that is disposed on the outer peripheral side of the magnet of the rotor 33b and applies a rotating magnetic field to the rotor 33b. The reduction mechanism input shaft 32 of the reduction mechanism 31 is connected to the rotation center of the rotor 33 b of the drive motor 33.

The meshing clutch mechanism 34 is composed of a torque transmitting section for transmitting the torque of the drive motor 33 and a drive section for fixing or releasing the torque transmitting section. The force transmitting portion includes a rotor 35 meshing clutch tooth portion 34a provided in a space enclosed by the rotor 33b and the magnet attachment portion 33a, a dehydrating shaft 27, and a case 35 having a bearing 26 for supporting the dehydrating shaft 27. The lower outer periphery is depressed toward the center of the shaft. The fixed side meshes with the clutch tooth portion 34b, the spline 27a provided on the dehydrating shaft 27, and the spline 27a of the dehydrating shaft 27, while engaging with the rotor side engaging clutch tooth portion 34a. A movable clutch 34c and a movable clutch slidable in the thrust direction provided with teeth engaged with the teeth and the fixed side engagement clutch teeth 34b. H is constituted by clutch driving means (not shown) for controlling the engagement between the rotor side meshing clutch teeth 34a and the fixed side meshing clutch teeth 34b, and drives the mounting portion between the drive motor 33 and the receiving cylinder 23. It is provided below the upper surface of the motor 33.

The operation of the embodiment will be described below. In the agitating washing / rinsing process, the power supply to the clutch driving means (not shown) for moving the meshing clutch mechanism 34 is stopped. The clutch driving means (not shown) includes a movable clutch 34.
The state c is engaged with the fixed side engagement clutch teeth 34b so that the dewatering shaft 27 cannot be rotated. The power of the drive motor 33 is only transmitted to the stirring blade 25 via the washing shaft 29, and gives a mechanical force to the laundry. Dehydration tank 2
The washing and rinsing of the laundry stored in No. 4 proceeds.

When the stirring and washing process is completed, the dehydration process is automatically started. In this dehydration process, water in the dehydration tub 24 is drained, and power is supplied to clutch driving means (not shown) for moving the meshing clutch mechanism 34. . The clutch driving means (not shown) separates the movable clutch 34c from the fixed-side meshing clutch teeth 34b, so that the rotor side meshing clutch teeth 34a and the dewatering shaft 27 can rotate in synchronization with the rotor 33b. The speed reduction mechanism input shaft 32 and the dewatering shaft 27 are connected, and the entire dewatering tub 24 rotates. Dehydration tank 2
The water of the laundry, which has been stirred and washed and rinsed by the rotation of 4, is squeezed out into the receiving cylinder 23 from a number of holes provided on the side surface of the dewatering tub 24 by centrifugal force. Thus, the laundry is automatically dehydrated. In this manner, the laundry put into the dewatering tub 24 automatically completes the agitated washing / rinsing / dehydration process.

As described above, according to this embodiment, the dewatering tank 2
4 is screwed to a dewatering tank mounting flange 28 provided at the upper end of a dewatering shaft 27 which is supported by a bearing 26 provided at the bottom of the receiving cylinder 23, so that the speed reduction mechanism 31,
Since the meshing clutch mechanism 34 and the drive motor 33 are located on the same axis, the position of the center of gravity of the dewatering tub 24 and the receiving cylinder 23 can be matched with the rotation center of the dewatering tub 24,
The occurrence of unbalance during dehydration can be suppressed, and the moment force generated by the unbalance of the dehydration tub 24 when the mounting position of the dehydration tub 24 is not separated from the upper bearing 26 that supports the dehydration shaft 27 is reduced. Can be smaller. Therefore, it is possible to provide a washing machine that does not need to particularly increase the strength of the case 35 of the bearing 26.

(Embodiment 2) Embodiment 2 of the present invention will be described below with reference to FIG. Embodiment 2 is a preferred embodiment of the invention according to claim 2. In this embodiment, the dewatering tub 24 is screwed to a dewatering tub mounting flange 28 provided at the upper end of a dehydrating shaft 27 which is supported by a bearing 26 provided at the bottom of the receiving cylinder 23. 2
Since the lower part of the edge 28a provided in a ring shape downward around the periphery of the bottom 8 is below the tip of the oil seal 36 of the dewatering shaft 27, even if water is poured into the receiving cylinder 23 and the dewatering shaft 27 is submerged,
It is an object of the present invention to provide a washing machine that can prevent the tip of the oil seal 36 of the dehydrating shaft 27 from being submerged and has a stronger sealing structure.

Embodiment 3 Hereinafter, Embodiment 3 of the present invention will be described with reference to FIG. Embodiment 3 is a preferred embodiment of the invention according to claim 3. In this embodiment, the dewatering tub 24 is screwed to a dewatering tub mounting flange 28 provided at the upper end of a dehydration shaft 27 which is supported by a bearing 26 provided at the bottom of the receiving cylinder 23. The dewatering tank mounting flange 28 is a separate component. The tip of the dewatering shaft 27 projects from the upper surface of the dewatering tank mounting flange 28,
When the dewatering tub 24 is mounted on the dewatering tub mounting flange 28, since the dewatering tub 24 is mounted on the basis of the dewatering tub 27, the center deviation between the dewatering tub 27 and the dewatering tub 24 is suppressed, and the rotation of the dewatering tub 27 during rotation is suppressed. In addition, the precision can be improved more easily and at a lower cost than by integrally processing the dewatering shaft 27 and the dewatering tank mounting flange 28. Furthermore, even if the distance between the shafts is shortened, the run-out is suppressed to be small, and the bearing 26, the case 35
Another object of the present invention is to provide a washing machine which does not require extra strength and has less vibration.

(Embodiment 4) Regarding Embodiment 4 of the present invention,
This will be described with reference to FIG. Embodiment 4 is a preferred embodiment of the invention according to claim 4. In the present embodiment, the fitting portion between the dewatering tub mounting flange 28 and the dewatering shaft 27 is press-fitted as serrations 28b, so that the length of the fitting can be shortened, and the distance between the mounting position of the dewatering tub 27 and the bearing 26 is further increased. The present invention provides a large-capacity washing machine in which the moment force generated due to the imbalance of the dewatering tub 24 can be reduced and the strength of the bearing 26 and the case 35 does not need to be increased.

Fifth Embodiment A fifth embodiment of the present invention will be described with reference to FIG. Embodiment 5 is a preferred embodiment of the invention according to claim 5. In the present embodiment, by providing a sealing structure in which a sealing material 37 is inserted in a fitting portion between the dewatering tub mounting flange 28 and the dewatering shaft 27, the fitting portion between the dewatering tub mounting flange 28 and the dewatering shaft 27 is rotated. Since press-fitting for transmitting the force is sufficient, there is no need to increase the processing accuracy of the fitting portion between the dewatering tub mounting flange 28 and the dewatering shaft 27, and an inexpensive washing machine is provided.

Embodiment 6 Embodiment 6 of the present invention will be described with reference to FIG. Embodiment 6 is a preferred embodiment of the invention according to claim 6. In the present embodiment, a washing machine is provided in which the sealing performance is improved by using the foamable sealing material 37a as the sealing material, and the workability when the dewatering tank mounting flange 28 is mounted on the dewatering shaft 27 is also provided. It is.

(Embodiment 7) Embodiment 7 of the present invention will be described with reference to FIG. Embodiment 7 is a preferred embodiment of the invention according to claim 7. In the present embodiment, two inlets 28c are provided in the dewatering tank mounting flange 28, and the foamable sealing material 37a is injected from one place, and the other is degassed to confirm the filling. Since the inlet 28c is located above the tip of the oil seal 36 of the dewatering shaft, the work of injecting the foamable sealing material 37a can be performed after assembly.

Further, since the injection port 28c is located above the tip of the oil seal 36 of the dehydrating shaft 27, the oil seal 36 is not damaged at the time of assembling. There is no sticking or foaming of the sealing material 37a between the oil seals 36, thereby deteriorating the sealing performance. Another object of the present invention is to provide a washing machine capable of confirming that the user has forgotten the sealing operation.

[0034]

According to the first aspect of the present invention, the dewatering tank is provided with a screw on the dewatering tank mounting flange provided at the upper end of the dewatering shaft supported by a bearing provided at the bottom of the receiving cylinder. The distance from the bearing which is stopped and is higher than the distance between the bearings supporting the dewatering shaft to the dewatering tank mounting position is shortened.
In addition, since the deceleration mechanism, the clutch mechanism, and the drive motor are located on the same axis, the position of the center of gravity of the dewatering tub and the receiving cylinder can be matched with the rotation center of the dewatering tub, and the occurrence of imbalance during dewatering can be prevented. In addition to suppressing the moment, the moment force generated by the imbalance of the dewatering tub when the dewatering tub mounting position is not separated from the bearing can be reduced.
Therefore, there is no need to increase the case strength of the dewatering shaft bearing or the dewatering shaft bearing.

According to the invention described in claim 2 of the present invention, the dewatering tub is screwed to a dewatering tub mounting flange provided at the upper end of the dewatering shaft supported by a bearing provided at the bottom of the receiving cylinder. Since the lower part of the rim provided downward in a ring shape around the dewatering tank mounting flange is below the tip of the oil seal of the dewatering shaft, even if water is poured into the receiving cylinder and the dewatering shaft is submerged, the dewatering shaft is Of the oil seal can be prevented from being submerged, resulting in a stronger seal structure.

According to the invention described in claim 3 of the present invention, the dewatering tub is screwed to a dewatering tub mounting flange provided at the upper end of the dewatering shaft supported by a bearing provided at the bottom of the receiving cylinder. The dewatering shaft and the dewatering tank mounting flange are separate parts. The tip of the dewatering shaft protrudes from the upper surface of the dewatering tub mounting flange, so when mounting the dewatering tub to the dewatering tub mounting flange, the dewatering shaft is attached as a reference, so the center deviation with the dewatering shaft is suppressed, and the runout during rotation suppress. In addition, the precision can be increased more easily and more cost-effectively than by integrally processing the dewatering shaft and the dewatering tank mounting flange. Further, even if the distance between the shafts is short, the run-out is suppressed to a small value, and no extra strength is required for the dewatering shaft support portion.

According to the invention described in claim 4 of the present invention, the fitting portion between the dewatering tank mounting flange and the dewatering shaft is serrated and press-fitted, so that the length of the fitting can be shortened.
The space between the dewatering tank mounting position and the bearing can be further narrowed,
Since the moment force generated by the imbalance of the dewatering tub can be reduced, it is not necessary to increase the strength of the dewatering shaft bearing or the case of the dewatering shaft bearing, thereby realizing a large capacity washing machine.

According to a fifth aspect of the present invention, a deceleration mechanism, a meshing clutch mechanism, and a drive motor are arranged in this order from the stirring blade side, and these are arranged on the same axis. , A case having a bearing for supporting the dewatering shaft, the upper and lower parts of the case are constituted, the lower part is constituted by a drive motor, and a sealing structure is provided at a fitting portion between the dewatering tank mounting flange and the dewatering shaft. Since the fitting part between the dewatering tub mounting flange and the dewatering shaft has good press-fitting accuracy for transmitting rotational force, there is no need to increase the processing accuracy of the fitting part between the dewatering tub mounting flange and the dewatering shaft. , To realize an inexpensive washing machine.

The dewatering tub mounting flange and the dewatering shaft need not be press-fitted by fitting. It may be knurled and press-fitted. Further, it may be something like a screw.

According to the invention described in claim 6 of the present invention, by using a foamable sealing material as the sealing material, the sealing performance is improved, and the workability when the dewatering tank mounting flange is mounted on the dewatering shaft can also be improved. It is intended to realize a washing machine that can do what is possible.

According to the invention described in claim 7 of the present invention, since the injection port is provided in the dewatering tank mounting flange, and the injection port is located above the tip of the oil seal portion of the dewatering shaft, the sealing operation can be performed after assembly. In addition, since the injection port is located above the tip of the oil seal part, the oil seal does not hurt during assembly, and the injected seal material adheres to the oil seal even after assembly, or the seal material may be caught and deteriorate the sealing performance. Absent. Also,
It is an object of the present invention to realize a washing machine capable of confirming that the user has forgotten the sealing operation after the operation.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an overall configuration of a washing machine according to a first embodiment of the present invention.

FIG. 2 is a detailed sectional view of a dewatering tub mounting portion of the washing machine according to the first, second, third, fifth and sixth embodiments of the present invention.

FIG. 3 is a detailed sectional view of a dewatering tub mounting portion of a washing machine according to a fourth embodiment of the present invention.

FIG. 4 is a detailed view of a dewatering tub mounting portion of a washing machine according to a seventh embodiment of the present invention.

FIG. 5 is a cross-sectional view illustrating the overall configuration of a conventional washing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Main body 22 Suspension 23 Receiving cylinder 24 Dehydration tank 25 Stirrer blade 26 Bearing 27 Dehydration shaft 27a Spline 28 Dehydration tank mounting flange 28a Ring-shaped edge 28b Serration 28c Inlet 29 Washing shaft 30 Bearing 31 Reduction mechanism 32 Reduction mechanism input shaft Reference Signs List 33 drive motor 34 meshing clutch mechanism 34a rotor side meshing clutch teeth 34b fixed side meshing clutch teeth 34c movable clutch 35 case 36 oil seal 37 sealing material 37a foaming sealing material

Claims (7)

[Claims] A dehydrating shaft comprising a plurality of components for rotating the dehydrating tub; a washing shaft for rotating a stirring blade disposed in the dehydrating tub and disposed coaxially with the dehydrating shaft; A drive motor for rotating the spinning shaft and the washing shaft, a speed reduction mechanism for reducing the rotation of the drive motor to rotate the washing shaft, and a clutch mechanism for transmitting or not transmitting the rotation of the driving motor to the spinning shaft And a receiving cylinder containing the dewatering tub, a flange for fixing the dewatering tub to the dehydration shaft, and a plurality of bearings supporting the dehydration shaft, wherein the speed reduction mechanism and the drive Along with the motor is disposed coaxially, the clutch is included in the drive motor, and the distance between the upper and lower two bearings that support the dehydration shaft,
A washing machine characterized in that a distance from an upper bearing to a dewatering tub mounting position is shortened. 2. The washing machine according to claim 1, wherein a ring-shaped edge is provided below the periphery of the dewatering tub mounting flange, and a sealing tip of the dewatering shaft is located above the ring-shaped edge. 3. The washing machine according to claim 1, wherein the dewatering shaft and the dewatering tub mounting flange are separate parts, and a tip of the dewatering shaft is projected from the dewatering tub mounting flange. 4. The washing machine according to claim 1, wherein a fitting portion between the dewatering tub mounting flange portion and the dewatering shaft is serrated and press-fitted. 5. The washing machine according to claim 3, wherein a seal structure is provided at a fitting portion between the dewatering tub mounting flange portion and the dewatering shaft. 6. The washing machine according to claim 5, wherein a foaming sealing material is used for the sealing structure. 7. The washing machine according to claim 6, wherein a seal inlet is provided in the dewatering tub mounting flange portion, and the inlet is located above the seal tip of the dewatering shaft.