JP3097658B2 - 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 for washing, rinsing and dewatering clothes.

[0002]

2. Description of the Related Art Conventionally, this type of washing machine has been configured as shown in FIG. Hereinafter, the configuration will be described.

As shown in FIG. 1, a washing machine main body 1 is provided with a water receiving tub 3 supported by a suspension 2 therein.
A washing and dewatering tub 4 is rotatably provided in the water receiving tub 3, and the washing and dewatering tub 4 has an open top surface so that laundry can be put in from the top surface. Further, a stirring blade 5 is rotatably provided at the bottom, and has a large number of holes on the side surface.

[0004] As shown in FIG.
The stirring blade 5 is fixed to a spinning shaft 7 supported by a bearing 6 provided on the bottom surface of the water receiving tank 3, and the stirring blade 5 is fixed to a washing shaft 9 supported by a bearing 8 inside the spinning shaft 7. I have. The washing shaft 9 is connected to a speed reduction mechanism 10, and a pulley 12 is attached to the speed reduction mechanism input shaft 11.

[0005] The mounting portion of the pulley 12 of the speed reduction mechanism input shaft 11 has four cut-out surfaces, and the mounting hole of the pulley 12 is formed in a shape that fits into the hole, thereby transmitting the rotational force of the pulley 12. The pulley 12 is connected to a motor 14 via a belt 13. Further, the speed reduction mechanism input shaft 11 has a clutch mechanism 15 for switching the rotation of the motor 14 to the washing shaft 9 or the dehydrating shaft 7 and transmitting the rotation.

In the above configuration, during the washing and rinsing steps,
Release the clutch driving means 15b of the clutch mechanism 15,
The rotation of the motor 14 is only transmitted to the stirring blade 5 via the washing shaft 9 and gives a mechanical force to the laundry. Thus, the washing and rinsing of the laundry stored in the washing and dewatering tub 4 proceeds.

In the dehydration process, the clutch driving means 15b of the clutch mechanism 15 is driven, and the rotation of the motor 14 is transmitted only to the washing and dewatering tub 4 via the dehydrating shaft 7, so that the entire washing and dewatering tub 4 is rotated. Rotates. The water content of the laundry, which has been washed and rinsed by the rotation of the washing and dewatering tub 4, is squeezed out into the water receiving tub 3 from a large number of holes provided on the side surface of the washing and dewatering tub 4 by centrifugal force. It is.
Thus, the laundry is automatically dehydrated.

[0008]

In such a conventional configuration, the speed reduction mechanism 1 is driven by the motor 14 via the belt 13.
Since the power is transmitted to 0, the number of parts increases to increase the washing capacity and the cleaning power, and the cost is high. There was an upper limit on the transmission torque due to a change in the tension of the belt 13 due to a change over time such as belt elongation or belt breakage, and it was not possible to obtain a transmission torque corresponding to a large capacity.

Since the heavy motor 14 and the speed reduction mechanism 10 are arranged below the water receiving tub 3, the washing and dewatering tub 4 suspended in the main body 1 of the washing machine and the water receiving tub are provided. 3
And the center of gravity of the washing / dewatering tub 4 is deviated from the rotation center (dehydrating shaft 7) of the washing and dewatering tub 4. Thus, when the washing and spin-drying tub 4 performs spin-drying, it tends to be unbalanced, and vibration due to spinning tends to increase.

The present invention has been made to solve the above-mentioned conventional problems, and reduces the number of parts and suppresses the occurrence of unbalance during dehydration in response to an increase in washing capacity.
The purpose is to improve the safety by preventing water from entering the motor even if water overflows from the water receiving tank for some reason, and to make it easier to install the stator. I have.

[0011]

SUMMARY OF THE INVENTION The present invention achieves the above-mentioned object, and comprises rotating a hollow dewatering shaft and a washing shaft arranged coaxially with the dewatering shaft by a motor so that the dewatering shaft can be used for washing and washing. While rotating the spin-drying tub, the rotation of the motor is reduced by the speed reduction mechanism, the washing shaft is rotated by the washing shaft, and the stirring blade disposed in the spin-drying tub is rotated. The motor bracket formed in a cup shape is attached to the speed reduction mechanism with the opening downward, the motor is configured in the motor bracket, the speed reduction mechanism and the motor are arranged on the same axis, and the opening of the motor bracket is opened. The inlet of the part is wider than the inner diameter of the inside.

Thus, it is possible to reduce the number of parts, suppress the occurrence of imbalance during dehydration in response to an increase in washing capacity, and to prevent water from overflowing from the water receiving tank for some reason. Thus, water can be prevented from entering the inside of the motor, safety can be improved, and the work of assembling the stator can be facilitated.

[0013]

DETAILED DESCRIPTION OF THE INVENTION The invention according to claim 1 of the present invention is characterized in that a dehydrating shaft for rotating a washing and dewatering tub, a stirring blade disposed in the washing and dewatering tub are rotated and the dehydrating shaft is rotated. A washing shaft arranged coaxially, a motor for rotating the dehydrating shaft and the washing shaft, a reduction mechanism for reducing the rotation of the motor to rotate the washing shaft, and transmitting the rotation of the motor to the dehydrating shaft a clutch mechanism for switching to, mosquitoes
Open the motor bracket with the opening down.
Attach the clutch mechanism inside the motor bracket
Forming the motor, inside the motor bracket
And a rotor is mounted on the inner peripheral side of the stator.
And the speed reduction mechanism and the motor are
The motor bracket is disposed on one axis and the entrance of the opening of the motor bracket is provided.
Is wider than the inner diameter of the
The stator is configured to be held by the
A stator contact surface is provided at a position facing the caulked portion
Since the opening of the motor bracket is located downward, there is no seam at the top of the motor bracket, and water overflowing from the water receiving tank can be prevented from entering the motor.
Also, since the speed reduction mechanism and the motor are located on the same axis,
The center of gravity of the washing and dewatering tub, the water receiving tub, etc. can be matched with the rotation center of the washing and dewatering tub, preventing the occurrence of unbalance during dehydration and eliminating the need for a belt, which also poses problems with belts. Can be eliminated, the number of parts can be reduced, and the assemblability can be improved,
Also, since the clutch mechanism can be made thinner and smaller,
The large volume below the washing machine main body can be suppressed, and the opening of the opening of the motor bracket formed in a cup shape is wider than the inner diameter of the inside. Can be.

Further, the stator is held by a caulking portion provided on the motor bracket, and a contact surface of the stator is provided at a position facing the caulking portion, so that deformation of the stator due to caulking can be prevented. it can.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) As shown in FIG. 2, a washing machine main body 16 is provided with a water receiving tank 18 suspended by a suspension 17 so as to prevent dehydration vibration therein. A washing and dewatering tub 19 is rotatably disposed, and a stirring blade 20 for stirring the laundry is rotatably disposed at the inner bottom of the washing and dewatering tub 19.

The washing and dewatering tub 19 is, as shown in FIG.
The stirring blade 20 is fixed to the upper end of a dehydrating shaft 22 which is supported by a bearing 21 provided at the bottom of the water receiving tank 18.
It is disposed coaxially with the dewatering shaft 22 in the hollow portion of the dewatering shaft 22, and is fixed to the upper end of a washing shaft 24 supported by a bearing 23 provided in the hollow portion of the dewatering shaft 22. The lower end of the washing shaft 24 is connected to the output side of the speed reduction mechanism 25.

The motor bracket 26 is formed in a cup shape, is mounted on the speed reduction mechanism 25 with the opening 26a facing down, and a stator 27b for applying a rotating magnetic field to the rotor 27a is press-fitted into the motor bracket 26.
A motor 27 is configured with a rotor 27a opposed to the motor 27, the reduction mechanism 25 and the motor 27 are arranged on the same axis, and a reduction mechanism input shaft 28 of the reduction mechanism 25 is connected to the rotor 27 of the motor 27.
a to the center of rotation. In addition, the inlet 26b of the opening of the motor bracket 26 is wider than the inside diameter.

The clutch mechanism 29 switches the rotation of the motor 27 to either the dehydrating shaft 22 or the washing shaft 24. A clutch spring 29a is provided in a space provided inside the rotor 27a, and the clutch spring 29a is driven externally. A clutch driving means 29b is provided.

The operation of the above configuration will be described. Washing,
In the rinsing stroke, the clutch driving means 29b of the clutch mechanism 29 releases the clutch spring 29a, and the dehydrating shaft 2
2 cannot transmit torque. The power of the motor 27 is only transmitted to the stirring blade 20 via the washing shaft 24, and gives a mechanical force to the laundry. Thus, the washing and rinsing of the laundry housed in the washing and dewatering tub 19 proceeds.

When the washing process is completed, a dehydration process is started. In this dehydration process, water in the washing and dewatering tub 19 is drained,
The clutch driving means 29b of the clutch mechanism 29 drives the clutch spring 29a so that a rotational force can be transmitted to the dehydrating shaft 22. As for the power of the motor 27, the speed reduction mechanism input shaft 28 and the dehydrating shaft 22 are connected, and the washing and dehydrating tub 19 rotates.

As the washing and dewatering tub 19 rotates, the water content of the laundry, which has been washed and rinsed, is condensed into the water receiving tub 18 through centrifugal force from a number of holes provided in the side surface of the washing and dewatering tub 19. Will be issued. Thus, the laundry is automatically dehydrated. In this manner, the laundry put into the washing / dewatering tub 19 automatically finishes the washing, rinsing, and dehydrating steps.

As described above, according to the present embodiment, the washing shaft 2
4. The dehydrating shaft 22 has a double structure in which the dehydrating shaft 22 is coaxial, and the speed reducing mechanism 25, the clutch mechanism 29, and the motor 27 are arranged in this order from the stirring blade 20 side. Are integrated, and the center of gravity is located at the center of the water receiving tank 18, so that the imbalance caused by the motor 27 not being at the center of the water receiving tank 18 as in the related art is eliminated, and vibration during dehydration can be suppressed. Further, since the speed reduction mechanism 25 and the dehydrating shaft 22 are directly rotated by the motor 27, a conventional belt is not required, and belt slip and durability can be eliminated.

A motor 27 is formed in a motor bracket 26 formed in a cup shape.
6, the upper surface of the motor bracket 26 is seamless, so that even if the water overflows from the water receiving tank 18, the overflow water can be prevented from entering the inside of the motor 27 and the motor 26 can be prevented. Since the bracket 26 is an integral part, the number of parts can be reduced, the assemblability can be improved, and the weight can be reduced.

Further, since the inlet 26b of the opening of the motor bracket 26 is wider than the inner diameter, the press-fitting of the stator 27b is easy and the assembling property can be improved.

(Embodiment 2) As shown in FIG. 3, the motor bracket 30 is formed in a cup shape and attached to the speed reduction mechanism 25 with the opening 30a facing downward, and a neutral point portion of a stator 31b constituting the motor 31 is formed. 3
A side surface portion 30c of the motor bracket 30 facing 1d is cut out, and the cutout portion 30d is provided below the stator 31b. The motor 31 is disposed on the same axis as the speed reduction mechanism 25, and the speed reduction mechanism input shaft 28 of the speed reduction mechanism 25 is connected to the rotation center of the rotor 31 a of the motor 31.
The motor cover 32 is formed in a cup shape and covers the opening 30a of the motor bracket 30.

The connector portion 31e is provided with a stator 31.
The motor bracket 30 is provided with a notch for escape from the connector 31e, and the notch 30e is provided below the mounting position of the stator 31b. Further, the motor bracket 30 has a shape in which only the connector portion 31e of the motor 31 projects. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. The motor 31 is inserted into the motor bracket 30 formed in a cup shape.
With the opening 30a of the motor bracket 30 facing downward, even if water overflows from the water receiving tank, water traveling from the upper surface of the motor bracket 30 to the surface of the motor bracket 30 faces the neutral point 31d of the stator. It is possible to prevent insulation failure and rust from entering the stator 31b from the notch portion 30d of the motor bracket 30 and improve durability.

The motor bracket 30 is provided with a notch for escaping the connector portion 31e, and the notch portion 30e
Is provided below the mounting position of the stator 31b, so that the notch 3 through which the water traveling along the surface from the upper portion of the motor bracket 30 escapes the connector 31e of the motor 31.
It is possible to prevent poor insulation and rust from entering the stator 31b from 0e, thereby improving durability.

Further, the motor bracket 30 is
Since only the connector portion 31e is overhanging, the outer diameter of the motor bracket 30 can be reduced in size and weight without increasing the entire outer diameter of the motor bracket 30 for waterproofing and insulation of the connector portion 31e. Water can be prevented from entering.

(Embodiment 3) As shown in FIG. 4, the motor bracket 33 is formed in a cup shape and attached to the reduction mechanism with the opening 33a facing down.
The motor 31 is formed in the motor bracket 33,
The speed reduction mechanism and the motor 31 are arranged on the same axis.
The motor bracket 33 is provided with a cut-and-raised portion, and the cut-and-raised portion is used as a mounting portion 33f of the motor cover 34 that covers the opening 33a of the motor bracket 33. The position of the mounting portion 33f of the motor cover 34 is defined as the stator 31.
It is provided below. Other configurations are the same as those in the first or second embodiment.

The operation of the above configuration will be described. The motor bracket 33 is provided with a cut-and-raised portion, and the cut-and-raised portion is used as a mounting portion 33f of a motor cover 34 that covers the opening 33a of the motor bracket 33, thereby providing a screw-tightening operation. Since the direction can be made one direction, the workability of the assembly can be enhanced, and the mounting portion 33f of the motor cover 34 is formed by cutting and raising the motor bracket 33. Variations during assembly can be absorbed. Further, by selecting the position of the cut-and-raised portion on the motor bracket 33, deformation and rolling of the clutch lever and the like when placed alone can be prevented.

Further, the mounting portion 33 of the motor cover 34
Since the position f is provided below the stator 31, the motor 3 is inserted into the motor bracket 33 formed in a cup shape.
1, the water coming from the upper part of the motor bracket 33 with the opening 33 a of the motor bracket 33 down enters the stator 31 b from the mounting part 33 f of the motor cover 34, resulting in poor insulation and rust. Can be prevented, and the durability can be improved.

(Embodiment 4) As shown in FIG. 5, the motor bracket 35 is formed in a cup shape and attached to the speed reduction mechanism with the opening 35a facing down.
The motor 31 is formed in the motor bracket 35,
The speed reduction mechanism and the motor 31 are arranged on the same axis.
The motor bracket 35 is provided with a caulked portion 35g, and a stator contact surface 35h is provided at a position facing the caulked portion 35g.
g holds the stator 31b.

At this time, the caulked portion 35g supporting the stator 31b provided on the motor bracket 35 is not completely bent to the stator 31b, but the bent portion is directed downward. Other configurations are the same as those in the first or second embodiment.

The operation of the above configuration will be described. The stator contact surface 35h of the motor bracket 35 and the swaged portion 3
By holding the stator 31b with 5 g, the stator 31b can be prevented from being deformed by being pushed, so that the vibration of the motor 31 and insufficient torque performance can be prevented.

Further, since the swaged portion 35g for supporting the stator 31b is not completely bent to the stator 31b, but the tip of the bent portion is directed downward, the motor bracket 35
Water coming from the top of the motor bracket 35
However, since the tip of the caulking portion 35g faces downward, the crimping portion 35g does not penetrate the stator 31b, so that the durability can be improved.

(Embodiment 5) As shown in FIG. 6, the motor bracket 36 is formed in a cup shape and attached to the reduction mechanism with the opening 36a facing downward.
The motor 31 is configured in the motor bracket 36,
The speed reduction mechanism and the motor 31 are arranged on the same axis.
The motor bracket 36 is provided with a caulked portion 36g, and a stator contact surface 36h is provided at a position facing the caulked portion 36g.
g holds the stator 31b.

The rotation stop projection 36 is attached to the motor bracket 36.
i, and the detent protrusion 36i is fitted into the detent U-groove 31f provided on the stator 31b, and the stator 31b
It has a detent function. Stator contact surface 36h
Is made wider than the width of the non-rotating U-groove 31f.
Other configurations are the same as those in the first or second embodiment.

The operation of the above construction will be described. In the position where the non-rotating U groove 31f provided on the stator 31b is located,
The rotation stop of the stator 31b and the swaging for supporting the stator 31b can be performed simultaneously. In addition, since the width of the stator contact surface 36h is large, the inclination of the stator 31b when the stator 31b is swaged can be prevented.

Further, since the stator contact surface 36h closes the detent U-groove 31f provided on the stator 31b, the resistance of the air passing through the detent U-groove 31f becomes a resistance, and the air flows on the coil 31c side of the motor 31 to efficiently perform the operation. The coil 31c can be cooled.

(Embodiment 6) As shown in FIG. 7, the motor bracket 37 is formed in a cup shape and attached to the reduction mechanism with the opening 37a facing down.
The motor 31 is formed in the motor bracket 37,
The speed reduction mechanism and the motor 31 are arranged on the same axis.
A caulking portion 37g is provided on the motor bracket 37, and a stator abutment surface 37h is provided at a position facing the caulking portion 37g.
g to hold the stator 31b.
The number of 7g is provided more than the total number that can support the stator 31b.

The anti-rotation protrusion 37 is attached to the motor bracket 37.
i, and this detent protrusion 37i is fitted into the detent U-shaped groove 31f provided on the stator 31b, and the stator 31b
It has a detent function. Other configurations are the same as those in the first or second embodiment.

The operation of the above configuration will be described. Since the number of the caulking portions 37g is set to be larger than the total number capable of supporting the stator 31b, it can be used as a spare for the failure of the motor bracket 37 for fixing the stator 31b. Also, the motor bracket 37 can be used repeatedly, and the recyclability can be improved.

(Embodiment 7) As shown in FIG. 8, the motor bracket 38 is formed in a cup shape and attached to the reduction mechanism with the opening 38a facing downward.
The motor 31 is formed in the motor bracket 38,
The speed reduction mechanism and the motor 31 are arranged on the same axis.
The motor bracket 38 is provided with a caulked portion 38g, and a stator contact surface 38h is provided at a position facing the caulked portion 38g.
g holds the stator 31b.

The stator 31b is provided with a non-rotating U-groove 31f at a position facing the caulking portion 38g. The stator 31b is caulked in accordance with the non-rotating U-groove 31f, and the motor is inserted into the non-rotating U-groove 31f. The swaged portion 38g of the bracket 38 is fitted. Other configurations are the same as those in the first or second embodiment.

The operation of the above structure will be described. The swaging portion 38g of the motor bracket 38 is fitted in the U-shaped groove 31f provided in the stator 31b, so that the rotation of the stator 31b is supported and the stator 31b is supported. be able to.

[0048]

As described above, according to the present invention, the entrance of the opening of the motor bracket is made wider than the inner diameter of the inside.
The work of assembling the stator is easy, and the plastic deformation that expands the inner diameter entrance of the motor bracket improves the roundness of the opening of the motor bracket, facilitates fitting with the motor cover, and improves assemblability. be able to.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a washing machine according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the washing machine.

FIG. 3 is a sectional view of a main part of a washing machine according to a second embodiment of the present invention.

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

FIG. 5 is a sectional view of a main part of a washing machine according to a fourth embodiment of the present invention.

FIG. 6 is an exploded perspective view of a main part of a washing machine according to a fifth embodiment of the present invention.

FIG. 7 is an exploded perspective view of a main part of a washing machine according to a sixth embodiment of the present invention.

FIG. 8 is a sectional view of a main part of a washing machine according to a seventh embodiment of the present invention.

FIG. 9 is a sectional view of a conventional washing machine.

FIG. 10 is a sectional view of a main part of the washing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 19 Washing and dewatering tank 20 Stirring blade 22 Dehydration shaft 24 Washing shaft 25 Reduction mechanism 26 Motor bracket 26a Opening 27 Motor 29 Clutch mechanism

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Junichi Takamatsu 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-57-39879 (JP, A) JP-A-2-237596 (JP, A) JP-A-2-311136 (JP, A) JP-A-3-107345 (JP, A) Japanese Utility Model Application No. 3-66544 (JP, U) Japanese Utility Model Application No. 62-145461 (JP, U) Japanese Utility Model Application No. 59-25938 (JP, U) Japanese Utility Model Application No. 4-47359 (JP, U) Japanese Utility Model Application No. 57-101551 (JP, U) JP-B-61-41359 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 37/40 H02K 5/04

Claims (1)

(57) [Claims] A dehydrating shaft for rotating a washing and dewatering tub; a washing shaft for rotating a stirring blade disposed in the washing and dewatering tub and disposed coaxially with the dewatering shaft; A motor for rotating the washing shaft, a deceleration mechanism for reducing the rotation of the motor to rotate the washing shaft, and a clutch mechanism for switching the rotation of the motor to be transmitted to the dehydrating shaft ; Open the motor bracket
To the inside of the motor bracket.
Forming a latch mechanism, wherein the motor is mounted on the motor bracket;
The stator is mounted inside the
The rotor is opposed to the side, and the speed reduction mechanism and the motor
Motor on the same axis and open the motor bracket.
Enlarge the inlet of the mouth from the inner diameter of the inside, and
Hold the stator with swaged parts provided on the
And a stator abutment at a position facing the caulking part.
Washing machine with surface .