JPH0451996A - Washer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a fully automatic washing machine.

<Prior Art> In recent years, with the increase in the number of employed housewives, they do not have time to wash their clothes, so they wash their clothes all at once, and there is a tendency for fully automatic washing machines to have a larger capacity.

A conventional fully automatic washing machine is shown in No. 3.4111. The washing machine itself! Inside, an outer tank 2 is elastically suspended by a hanging rod 3. A dehydrator [5] having a plurality of dehydrating holes 4 in the side wall is housed in the outer tank 2, and a rotatable stirring blade 6 is disposed at the inner bottom of the dehydrator tank 5.

A washing shaft 7 that rotationally drives the stirring blade 6 is connected to a drive pulley 10 that transmits power from a drive device 9 via a belt 8.
is connected to via a speed reduction device 111.

Further, the dehydration shaft 12 that rotationally drives the dehydration tank 5 is connected to a drive pulley lO via a clutch means 13, and during dehydration operation, the drive pulley lO is operated by the action of the clutch means 13.
O and the dehydration shaft 12 are in a connected state, and the driving force of the drive device 9 is transmitted to the dehydration shaft 12. Note that the dehydration shaft 12 includes:
A washing shaft 7 and a speed reducer 11 are inserted therein, and a gear case 14 is provided for inserting the speed reducer 11 therein.

Further, the gear case 14 is disposed below the outer tank 2 and is housed inside a case cover 15 attached to the bottom surface of the outer tank 2.

The dewatering shaft 12 is rotatably supported by bearings 16 and 17 on the bottom surface of the outer tank 2 and the lower surface of the case cover 15, respectively.

Further, a U-shaped protection piece 18 is attached to the bottom surface of the outer tub 2 to prevent mechanical parts such as the drive pulley 10 from colliding with the outside world due to vibrations or the like when the washing machine main body 1 is transported.

<Problems to be Solved by the Invention> As washing machines become larger, the vibration energy during spin-drying operation increases, and if the fabric in the spin-drying tank 5 becomes uneven, the vibration energy will increase in the radial direction with respect to the spin-drying tank 5. A very large force is applied to the dehydration shaft 12, causing it to swing. Therefore, there is a problem in that a large stress is applied to the two bearings 16 and 17 that support the dehydration shaft 12.

In view of the above, an object of the present invention is to provide a washing machine that can stably support a dehydration shaft of a dehydration tank by reducing the load applied to the bearing.

Means for Solving the Problems 〉 The means for solving the problems according to the present invention is as shown in Fig. 1.2.
The dewatering tank 5 is equipped with an agitating blade 6 which is rotatably installed inside the dehydration tank 5 via a washing shaft 7, and a drive pulley IO which is externally supported on the washing shaft 7. The inserted dewatering shaft 12 is connected to the drive pulley l via the clutch means 13.
The upper bearing 20 is connected to the outer tank 2 and supports the dewatering shaft 12, and the washing shaft 7 is connected to the protective piece 18 which is disposed below the drive pulley 10 and protects the drive pulley 10.
A lower bearing 21 is provided to support the lower part of the shaft.

In the above problem-solving means, during dehydration, the dehydration @5 is connected to the drive pulley 10 by the clutch means I3, and the dehydration tank 5 rotates at high speed in accordance with the rotation of the drive pulley IO, thereby performing dehydration.

Therefore, although force is applied to the upper and lower bearings 20, 21 due to the bending moment generated on the dehydration shaft 12 due to vibrations of the dehydration tank 5, etc., the distance between the bearings is large, so the force applied to the bearing portion is significantly reduced. The dehydration shaft 12 can be stably supported. Therefore, since the vibration of the dehydration WI5 can be suppressed, the distance between the dehydration tank 5 and the outer tank 2 can be set small.
A compact design is possible.

Moreover, since the lower bearing 21 is provided using the protective piece 18 to protect the mechanical parts such as the drive pulley lO during transportation of the washing machine, the distance between the bearings can be reduced without changing the overall length of the mechanical part. It can be made longer without increasing costs.

<Example> An example of the present invention will be described below based on the drawings. FIG. 1 is a schematic diagram of a washing machine showing an embodiment of the present invention, and FIG. 2 is a sectional view of the bearing portion.

It should be noted that the same reference numerals are given to the same components as before.

As shown in the figure, the washing machine of the present invention has a hanging rod 3 attached to the washing machine main body l.
an outer tank 2 suspended by a dewatering tank 2, a dehydration tank 5 rotatably installed in the outer tank 2 via a dehydration shaft 12, and an agitation tank 5 rotatably installed in the dehydration tank 5 through a washing shaft 7. comprising a blade 6 and a drive pulley 10 externally supported by the washing shaft 7,
A dewatering shaft 12 into which the washing shaft 7 is rotatably inserted is connected to a drive pulley IO via a clutch means 13, and an upper bearing 20 supporting the dewatering shaft 12 in the outer tub 2 and a shaft located below the drive pulley 10 A lower bearing 21 for supporting the lower part of the washing shaft 7 is provided on a protective piece 18 disposed on the drive pulley 10 to protect the drive pulley 10.

The drive device 9 includes a motor 22 as a drive source installed at the bottom of the outer tank 2, a motor pulley 24 fitted onto the motor shaft 23 of the motor 22, and the drive pulley 10.
It consists of a belt 8 wound around both pulleys 10 and 24.

The washing shaft 7 includes an input shaft 30 fitted into the drive pulley IO, an output shaft 31 attached to the stirring blade 6 in close opposition to the upper end of the input shaft 30, and a rotational force from the input shaft 30. and a speed reduction device i11 that reduces the speed and transmits the speed to the output shaft 3I, and the speed reduction device 11 uses a planetary gear.

The dehydration shaft I2 consists of a cylindrical driven shaft 32 attached to the bottom of the dehydration tank 5, and a gear case 14 fixed to the driven shaft 32 and housing the reduction gear 11. The portion 33 is connected via the clutch means 13 to a cylindrical drive shaft 34 fixed to the drive pulley IO.

Although not shown, a brake device for dehydration braking is attached to the outer periphery of the gear case 14, and its inner periphery is engaged with the speed reduction device 11.

The output shaft 31 is rotatably inserted into the driven shaft 32, and the lower part of the input shaft 30 is connected to the cylindrical portion 3 of the gear case 14.
3 and the drive shaft 34, and penetrates the drive pulley 10, with its lower end protruding below the drive pulley 10.

The clutch means 13 is connected to the cylindrical portion 3 of the gear case 14.
3 and a spring clutch 4 fitted externally to the drive shaft 34
0, a ratchet gear 41 loosely fitted around the outer periphery of the spring clutch 40, an L-shaped stopper piece 42 that engages and separates from the ratchet gear 41, and a solenoid 43 that operates the stopper piece 42.

The clutch means 13 is configured such that the spring clutch 40 is connected to the cylindrical portion 33 of the gear case 14 by the forward rotation of the motor 22.
and is spaced apart from the outer circumferential surface of the drive shaft 34 and is configured to come into pressure contact with the cylindrical portion 33 and the outer circumferential surface of the drive shaft 34 when the motor 22 reverses.

Further, a case cover 15 housing the gear case 14 therein is attached to the bottom of the outer tank 2, and the cylindrical portion 33 of the gear case 14 and the input shaft 30 pass through the bottom of the case cover 15.

The protective piece 18 is a U-shaped angle that covers the dewatering shaft 12, the washing shaft 7, both sides of the driving pulley IO on which the belt 8 does not pass, and the lower part of the driving pulley IO,
Its upper end is attached to the bottom of the outer tank 2.

The upper bearing 20 has a driven shaft 3 passing through the bottom of the outer tank 2.
2 and a convex portion 2a that projects the bottom of the outer tank 2 toward the inner surface.

The lower bearing 21 is disposed on the lower surface of the protection piece 18 and supports the lower end of the input shaft 30.

In the above configuration, during washing, driving force is transmitted from the motor 22 to the drive pulley IO via the belt 8, and the drive pulley IO rotates. At this time, the clutch means 13
In -, the rotation of the ratchet gear 41 is stopped by the stopper piece 42, and the spring clutch 40 is separated from the cylindrical portion 33 of the gear case 14 and the drive shaft 34, so that the rotation of the drive pulley 10 is prevented from rotating by the dewatering shaft 12. is not transmitted, and the dehydration tank 5 does not rotate.

The rotation of the drive pulley 10 causes the input shaft 30 to rotate, which is decelerated by the speed reduction device 11, and a high rotational torque is applied to the output shaft 31, which rotates the stirring blades 6 to perform washing.

Next, during dewatering, the motor 22 is reversed, the stopper piece 42 is separated from the ratchet gear 41, and the ratchet gear 41 is idled. Then, the spring clutch 40 is tightened by the reverse rotation of the drive shaft 34, and the drive shaft 34 is tightened.
4 and the cylindrical portion 33 of the gear case 14 are in a connected state. Therefore, the driving force from the motor 22 is applied to the drive pulley 10.
, is transmitted to the gear case 14 and the driven shaft 32, and the dehydration tank 5 rotates at high speed in accordance with the rotation of the drive pulley 10.
Dehydration takes place.

Also, the driving pulley! 0 rotates, the input shaft 30 also rotates, but since the gear case 14 rotates, the reduction gear 11, which has a large reduction ratio and a large engagement between the gears, rotates integrally with the gear case 14. The stirring blade 6 also rotates at high speed in alignment with the dehydration shaft 12.

Therefore, during dehydration, force is applied to the bearing part due to the bending moment generated in the dehydration shaft 12 due to vibration of the dehydration tank 5, etc.
Since the distance between the bearings is increased, the force applied to the bearings is significantly reduced, and the dewatering shaft 12 can be stably supported.

Therefore, the vibration of the dehydration tank 5 can be suppressed.
The interval between the dewatering tank 5 and the outer tank 2 can be set small, allowing for a compact design.

Moreover, since the lower bearing 21 is provided using the protective piece 18 to protect the mechanical parts such as the drive pulley 10 during transportation of the washing machine, the distance between the bearings can be reduced without changing the overall length of the mechanical part. It can be made longer without increasing costs.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

<Effects of the Invention> As is clear from the above description, the present invention includes a dehydrating shaft of a dehydrating tank, a washing shaft of an agitating blade, and a drive pulley externally supported on the washing shaft, and A rotatably inserted dehydration shaft is connected to a drive pulley via a clutch means, an upper bearing supporting the dehydration shaft in the outer tank, and a protection piece disposed below the drive pulley to protect the drive pulley. Since a lower bearing is provided to support the lower part of the washing shaft, the distance between the bearings can be increased.
The force applied to the dehydration shaft due to vibrations of the dehydration tank during dehydration is significantly reduced, and the dehydration shaft can be stably supported.

Therefore, the vibration of the dehydration tank can be suppressed, so the distance between the dehydration tank and the outer tank can be set small, and a compact design is possible.

Moreover, since the lower bearing is provided using a protective piece to protect mechanical parts such as the drive pulley during transport of the washing machine, the distance between the bearings can be increased without changing the overall length of the mechanical part. It has an excellent effect in that it can be used without increasing costs.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a washing machine showing one embodiment of the present invention;
3 is a schematic diagram of a conventional washing machine, and FIG. 4 is a sectional view of the bearing. 2: Outer tank, 5: Dehydration tank, 6: Stirring blade, 7: Washing shaft, lO
: Drive pulley, 12: Dewatering shaft, 13: Clutch means,
18: Protective piece, 20: Upper bearing, 21, Lower bearing.

Claims (1)

[Claims] A dehydration tank rotatably installed in an outer tank through a dehydration shaft, an agitation blade rotatably installed in the dehydration tank through a washing shaft, and a drive pulley externally supported on the washing shaft. a dewatering shaft into which the washing shaft is rotatably inserted is connected to a drive pulley via a clutch means; an upper bearing supporting the dewatering shaft in the outer tub; A washing machine characterized in that a protection piece for protection is provided with a lower bearing for supporting a lower part of a washing shaft.