JP2001000780A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve safety and easily perform a work for attaching a stator to a machine in a washing machine for washing, rinsing and dehydrating clothes by suppressing the generation of an unbalance upon dehydration so as to meet the increase of a washing capacity and preventing water from entering a motor even when water overflows from a water vessel. SOLUTION: A washing and dehydrating drum 19 is rotated by a dehydrating shaft 22, its speed is reduced by a speed reducing mechanism 25 and an agitating blade 20 is rotated by a washing shaft 24 coaxial with the dehydrating shaft 22. The rotation of a motor 27 is switched to either the dehydrating shaft 22 or the washing shaft 24 by a clutch mechanism 29. A motor bracket 26 formed in a cup shape is attached to the speed reducing mechanism 25 with an opening part 26a directed downward. The motor 27 is formed in the motor bracket 26, and the speed reducing mechanism 25 and the motor 27 are provided so as to be coaxial with each other. The entrance part of the opening part 26a of the motor bracket 26 is widened more than the inside diameter of an inner part.

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 dehydrating 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 dehydrating 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 motor mechanism formed in the shape of a cup is mounted with the opening downward, a clutch mechanism is formed inside the motor bracket, and the motor has a stator mounted inside the motor bracket. A rotor is provided facing the inner peripheral side of the stator, the speed reduction mechanism and the motor are arranged on the same axis, and the motor bracket is provided with a cut-and-raised portion. And part is a material obtained by the mounting portion of the motor cover that covers the opening portion of the motor bracket.

In this configuration, a cut-and-raised portion is provided on the motor bracket, and the cut-and-raised portion is used as a mounting portion of a motor cover that covers the opening of the motor bracket. The workability can be improved, and the spring property of the cut-and-raised part provided on the motor bracket can absorb variations during assembly.In addition, by selecting the position of the cut-and-raised part on the motor bracket, the motor can be mounted. It is possible to prevent deformation of the clutch lever and the like when placed, and rolling when the drive device is placed.

[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. The washing and dewatering tub 19 is rotatably arranged in
A stirring blade 20 for stirring the laundry is rotatably disposed on 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, and since these are on the same axis, the motor 27 and the speed reducing mechanism 25 are arranged. 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 The side portion 30c of the motor bracket 30 opposing the notch 31d is cut out.
0d is provided below the stator 31b. Motor 3
1 is disposed on the same axis as the speed reduction mechanism 25,
Is connected to the rotation center of the rotor 31a 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 a reduction mechanism with an opening 33a facing down, and 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 3 f is provided below the stator 31. 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 a speed reduction mechanism with the opening 35a facing down, and 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 caulked portion 35g is provided on the motor bracket 35, and a stator contact surface 35h is provided at a position facing the caulked portion 35g, and the stator 31b is held by the stator contact surface 35h and the caulked portion 35g.

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 a reduction mechanism with an opening 36a facing down, and the motor 31 is formed 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, and the stator 31b is held between the stator contact surface 36h and the caulked portion 36g.

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. 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 speed reduction mechanism with the opening 37a facing downward, and 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, a stator contact surface 37h is provided at a position facing the caulking portion 37g, and the stator 31b is held by the stator contact surface 37h and the caulking portion 37g. Are provided more than the total number capable of supporting 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, a motor bracket 38 is formed in a cup shape and attached to a reduction mechanism with an opening 38a facing down, and a 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 caulking portion 38g, and a stator contact surface 38h is provided at a position facing the caulking portion 38g, and the stator 31b is held by the stator contact surface 38h and the caulking portion 38g.

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, a cut-and-raised portion is provided on the motor bracket, and the cut-and-raised portion is a mounting portion for the motor cover that covers the opening of the motor bracket. Can be set in one direction to improve the workability of assembly.Also, the spring property of the cut-and-raised portion provided on the motor bracket can absorb variations during assembly, and the position of the cut-and-raised portion on the motor bracket can be adjusted. By selecting this, deformation of the clutch lever and the like when the motor is placed, and rolling when the drive device is placed can be prevented.

[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 Dehydrating shaft 24 Washing shaft 25 Reduction mechanism 26 Motor bracket 26a Opening 27 Motor 29 Clutch mechanism

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshihiko Ura 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 72) Inventor Norimasa Kondo 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[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; The motor bracket is mounted with the opening part down, a clutch mechanism is formed inside the motor bracket, the motor is configured by mounting a stator inside the motor bracket and facing a rotor on the inner peripheral side of the stator. And the speed reduction mechanism and the motor are arranged on the same axis, and the motor bracket is
A washing machine having a cut-and-raised portion, and the cut-and-raised portion serving as a mounting portion for a motor cover that covers an opening of the motor bracket.