JP3103207B2 - Dehydration combined 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 both dehydration and a one-way clutch, which prevents a rotating tub from rotating in a direction opposite to a rotating direction during dehydration.

[0002]

2. Description of the Related Art Conventionally, in a washing machine for both dehydration,
It has a brake device for braking the rotary tub and a reverse rotation preventing device for preventing reverse rotation of the rotary tub due to the swirling water flow during washing. In this case, the brake device is constituted by a band brake device, and the reverse rotation preventing device is constituted by a one-way clutch.

An example of a configuration using the one-way clutch will be described with reference to FIG. In FIG. 4, the one-way clutch 1 is disposed below the brake drum 2 and has an outer race 3 which is a substantially cylindrical housing and a space between the outer race 3 and the lower hollow shaft 5 of the dewatering shaft 4. It has a plurality of rollers 6 interposed. The outer ring 3 is fitted and fixed in a substantially cylindrical mounting member 7. This mounting member 7
A fixed plate portion 7a is integrally formed in a flange shape at the lower end portion of the lower case.
It is fixed by. The stepped bolt 9 is loosely fitted in a through hole formed in the fixing plate portion 7a.

[0004]

However, in the above-mentioned conventional structure, when the one-way clutch 1 is assembled at the time of manufacturing, the housing 3 is fitted into the mounting member 7 and the fixing plate portion 7a of the mounting member 7 is fitted. To the lower case
Since the step 8 is fastened and fixed to the step 8 by the stepped bolt 9, the work of tightening the bolt 9 is troublesome, and since the mounting member 7 and the stepped bolt 9 are required, the number of parts is large and the cost is high. . Further, when the reverse rotation of the rotary tub is prevented, the mounting member 7 and its fixing plate 7a receive the reverse rotation force of the rotary tub. Therefore, it is necessary to increase the strength of the mounting member 7 and manufacture the mounting member 7. There was a disadvantage that the cost was high.

Accordingly, an object of the present invention is to provide a washing machine which can be used for both dehydration and can reduce the manufacturing cost while improving the manufacturing workability.

[0006]

SUMMARY OF THE INVENTION The present invention provides a dehydrating and washing machine having a brake device including a brake drum provided on a tub shaft of a rotary tub and a brake band mounted on an outer peripheral surface of the brake drum. A dehydrating / washing machine comprising a housing and a one-way clutch having a roller provided between the housing and the tub shaft and preventing rotation of the tub shaft in a predetermined direction, wherein the tub shaft is rotatable. The present invention is characterized in that a fitting portion having a concave and convex in the circumferential direction is integrally provided with a bearing housing for supporting a bearing to be fitted, so as to fit the housing of the one-way clutch and to prevent the housing from rotating.

In this case, a space for centering may be provided between the fitting portion and the housing of the one-way clutch.

[0008]

According to the above-mentioned means, the housing of the one-way clutch is fitted into the fitting portion provided integrally with the bearing housing for supporting the bearing of the tank shaft, and the housing is prevented from rotating. The mounting member and the bolt for fixing the clutch housing can be eliminated, and the bolt tightening operation can be eliminated. Then, the reversing force of the rotating tub comes to act on a fitting portion for fitting the housing of the one-way clutch, that is, the bearing housing. Since this bearing housing has a high strength from the beginning, the mounting member has a high strength. Such a separate member having high strength can be eliminated, and the manufacturing cost can be reduced.

Further, if a gap for alignment is provided between the fitting portion and the housing of the one-way clutch,
It is possible to prevent the alignment of the one-way clutch from being hindered due to the dimensional error and the assembly error of each component.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, in FIG. 3 showing the overall configuration of the washing machine for both dehydration and use, a water receiving tank 12 is elastically supported in the outer case 11 via a hanging rod mechanism (not shown) so as to be swingable. In the water receiving tank 12, a rotating tank 13 serving as both a washing tank and a dewatering tank is provided, and an agitator 14 is provided at the inner bottom of the rotating tank 13.

A power control mechanism 15 is provided at the outer bottom of the water receiving tank 12, and a case 16 of the power control mechanism 15 includes an upper case 17 and a lower case 18. And is fixed to the outer bottom of the water receiving tank 12. A motor 19 is attached to the outer bottom of the water receiving tank 12.
Through the power control mechanism 15.

On the other hand, as shown in FIG. 1, the power control mechanism 15 has a built-in speed reducer 21, a clutch mechanism 22, a brake device 23, and the like. Thereby, the power control mechanism 1
Reference numeral 5 denotes a rotating force of the motor 19, which is reduced and transmitted to the stirring body 14 during washing, and a rotating tank 13 and the stirring body 14 during dehydration.
To rotate the two together at high speed.

In FIG. 1, a dewatering shaft 24, which is a tub shaft for driving the rotary tub 13, is formed by integrally connecting an upper hollow shaft 25 and a lower hollow shaft 26 with a brake drum 27. . The brake drum 27 is composed of a drum main body 28 and a lid 29 that closes an opening on the lower surface of the drum main body 28. A sleeve 30 integrally formed on the upper end of the drum main body 28 is attached to the upper hollow shaft 25. Connected, lid 2
The lower hollow shaft 26 described above is integrally formed at the lower portion of 9.

The upper hollow shaft 25 of the dewatering shaft 24
Is supported on the upper case 17 via a bearing 31, and the lower hollow shaft 26 is supported on the lower case 18 via a bearing 32. In this case, the upper case 17 constitutes a bearing housing for supporting the bearing 31, and the lower case 18 constitutes the bearing 3
2 is constituted.

The brake drum 27 also serves as a casing for the speed reducer 21. A well-known planetary gear mechanism 33 for speed reduction is provided in the brake drum 27. . The input shaft of the planetary gear mechanism 33 is a drive shaft 34. The drive shaft 34 receives the torque from the motor 19 via the belt transmission mechanism 20 and the connection shaft 35, and is rotated. I have. Planetary gear mechanism 33
Is an agitating shaft 36, and the agitator 14 is connected and supported at the upper end of the agitating shaft 36.

On the other hand, in the clutch mechanism 22, a clutch sleeve 38 accommodating a clutch spring 37 is provided.
When engaged with a clutch lever 40 controlled by an electromagnet (not shown) together with a brake lever 39 to be described later (at the time of washing), the coupling shaft 35 that rotates integrally with the drive shaft 34 and the dehydrating shaft 24 are rotated. The transmission of rotational force to the lower hollow shaft 26, which is a part of the shaft, is cut off. Thus, at the time of washing, only the drive shaft 34 side is rotated by the motor 19, and as a result, the agitator 14 is driven at the rotation speed reduced by the reduction gear 21.

When the engagement by the clutch lever 40 is released (during dehydration), the connecting shaft 35 and the lower hollow shaft 26 are connected to transmit the rotational force to the dehydrating shaft 24. Has become. Thereby, at the time of spin-drying, the drive shaft 34, spin-dry shaft 24, brake drum 27 and stirring shaft 3
As a result, the rotary tank 13 is rotated at high speed together with the stirring body 14.

Further, with respect to the brake device 23, a brake band 41 for braking the brake drum 27 is mounted on the outer peripheral surface of the brake drum 27. The brake band 41 has one end connected to a pivot 42 fixed to the lower case 18 and the other end also rotatably supported by the lower case 18 by the pivot 42. It is connected to Kireva 39. A brake shoe is attached to a surface of the brake band 41 that contacts the brake drum 27.

Further, the brake lever 39 is constantly biased by a tension coil spring or the like (not shown) in a direction in which the brake band 41 is fastened to the brake drum 27. Is set in the same direction as the rotation direction of the rotating tub 13 during dehydration. The brake lever 39 is rotated in a direction in which the brake band 41 is loosened by an electromagnet or a motor.

A one-way clutch 43 is provided below the bearing 32 below the dewatering shaft 24 below the bearing 32. The one-way clutch 43 is a reverse rotation prevention device for the rotary tub 13. This will be described in detail with reference to FIGS. Will be described. This one-way clutch 4
2, includes a housing 44 and a plurality of rollers 45 interposed between the housing 44 and the lower hollow shaft 26 of the dewatering shaft 24. The housing 44 is a tubular member having a cross-sectional shape as shown in FIG.

At the lower end of the lower case 18, a fitting portion 46 for fitting the housing 44 of the one-way clutch 43 is integrally formed. This fitting portion 46
Is a cylindrical portion having a cross-sectional shape as shown in FIG. 2 (concave and convex in the circumferential direction). When the housing 44 is fitted, the two concave and convex portions are fitted to each other to form the housing 44. Is to be stopped. Thus, the one-way clutch 43 allows the dehydrating shaft 24, that is, the rotating tub 13 to rotate clockwise in FIG. 2, and prevents rotation in the counterclockwise direction as a predetermined direction.
A slight gap 47 is provided between the fitting portion 46 and the housing 44. The gap 47 allows the one-way clutch 43 to be smoothly aligned.

Next, the operation of the above configuration will be described. First, at the time of washing, the brake band 42 is fastened to the brake drum 27, and the rotating tub 13 is in a braking state. In this state, the agitator 14 is driven to rotate forward and reverse by the motor 19. When the stirrer 14 rotates forward and backward, a swirling water flow is generated in the rotating tub 13 and the laundry is washed. Receives forward and reverse rotational force.

Assuming that the rotating tub 13 receives a rotating force in the same direction as the rotating direction during dehydration,
Because it is a tight direction for 1, brake band 4
When 1 is more strongly tightened on the brake drum 27, a large braking force acts on the dewatering shaft 24, and the rotation of the rotary tub 13 in the same direction is prevented.

On the other hand, when the rotating tub 13 receives a rotating force in a direction opposite to the rotating direction at the time of spin-drying,
, The braking force of the dewatering shaft 24 by the brake band 41 decreases, and the rotating tub 13 may rotate in the above direction. In this case, when the rotating tub 13 is slightly rotated in the same direction, that is, in the counterclockwise direction in FIG. And further rotation is prevented.

According to this embodiment having such a configuration, the housing 44 of the one-way clutch 43 is fitted into the fitting portion 46 provided integrally with the lower case 18 supporting the bearing 32 of the dehydrating shaft 24. Further, since the housing 44 is configured to be prevented from rotating, unlike the conventional configuration (see FIG. 4), an attaching member and a bolt for fixing the housing 44 of the one-way clutch 43 can be eliminated, and
Bolt tightening work can be eliminated. Therefore, the manufacturing workability is improved and the manufacturing cost is reduced.

The reverse rotation force of the rotating tub 13 is applied to a fitting portion 46 for fitting the housing 44 of the one-way clutch 43.
That is, it acts on the lower case 18, and since the lower case 18 originally has a high strength, a separate high-strength member such as a mounting member of the conventional configuration can be eliminated, and the manufacturing cost can be reduced. Can be reduced. In addition, the fitting portion 46
And the housing 44 of the one-way clutch 43,
Since the alignment gap 47 is provided, it is possible to reliably prevent the alignment of the one-way clutch 43 from being hindered due to a dimensional error and an assembly error of each component.

[0027]

Since the present invention is as described above, the following effects can be obtained.

In the first aspect of the present invention, a fitting portion is integrally provided in a bearing housing that supports a bearing that rotatably supports the tub shaft, and a housing of the one-way clutch is fitted into the fitting portion. As a result, the housing is prevented from rotating, so that the manufacturing workability can be improved and the manufacturing cost can be reduced.

According to the second aspect of the present invention, a gap for centering is provided between the fitting portion and the housing of the one-way clutch. Accordingly, it is possible to prevent the alignment of the one-way clutch from being hindered.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a power control mechanism showing one embodiment of the present invention.

FIG. 2 is a cross-sectional view of a one-way clutch part.

FIG. 3 is a vertical sectional side view of the entire washing machine.

FIG. 4 is a diagram corresponding to FIG. 1 showing a conventional configuration.

[Explanation of symbols]

11 is an outer box, 13 is a rotary tank, 14 is a stirring body, 15 is a power control mechanism, 16 is a case, 17 is an upper case (bearing housing), 18 is a lower case (bearing housing), 23
Is a brake device, 24 is a dehydrating shaft (tank shaft), 25 is an upper hollow shaft, 26 is a lower hollow shaft, 27 is a brake drum, 31
Is a bearing, 32 is a bearing, 41 is a brake band, 43 is a one-way clutch, 44 is a housing, 45 is a roller,
46 indicates a fitting portion, and 47 indicates a gap.

Claims (2)

(57) [Claims] 1. A brake device comprising a brake drum provided on a tank shaft of a rotary tank and a brake band mounted on an outer peripheral surface of the brake drum, a housing and a brake device provided between the housing and the tank shaft. A dehydrating and washing machine having a one-way clutch having a set roller and preventing rotation of the tub shaft in a predetermined direction, wherein the one-way clutch is mounted on a bearing housing that supports a bearing that rotatably supports the tub shaft. With a concave and convex in the circumferential direction to fit the housing and prevent the housing from rotating.
A washing machine for both dehydration, wherein the fitting portion formed is integrally provided. 2. The washing machine according to claim 1, wherein a gap for centering is provided between the fitting portion and a housing of the one-way clutch.