JPS589569Y2 - drum type washing machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drum-type washing machine that can continuously perform a series of steps from washing to drying in a common drum.

This type of drum-type washing machine includes, for example, a rotating drum having a large number of small holes in its peripheral wall, which is rotatably disposed in a water receiving tank, and an agitation blade which is rotatably disposed within this rotary drum. It is known that these rotating drums and agitating blades are rotationally driven by a common drive motor via a drum transmission mechanism and a tool transmission mechanism, and this drives the drive motor at a low speed during washing and rinsing. At the same time, during dehydration, the drive motor is switched to high-speed operation to rotate the rotary drum and stirring blades at high speed, and when drying, the drive motor is switched back to low speed. After returning to operation, the rotation of the rotary drum and stirring blades is slowed down, and the laundry in the rotary drum is slowly stirred and dried with hot air.

By the way, in this type of washing machine, during washing and rinsing, in order to generate a whirlpool water flow in the rotating drum and increase the efficiency of washing and rinsing, the rotating speed of the rotating drum and the stirring blade are set to be different. For example, the drum transmission mechanism that connects the rotating drum and the drive motor has a structure in which the gear ratio is switched to two stages by a centrifugal clutch, and the stirring The transmission mechanism connecting the blade and the drive motor is constructed so that its gear ratio is always constant, and the desired operating state described above can be achieved by simply switching the rotational speed of the drive motor between high and low speeds. This is achieved by making it possible to obtain.

However, with this configuration, even when the drive motor is switched to low speed and the drying operation is started, the rotational speeds of the rotating drum and the stirring blade are different, as in the washing and rinsing operations. If the laundry being agitated in the rotating drum in the absence of washing water comes into contact with both the agitating blades and the rotating drum, the difference in rotational speed between the two may cause fabric breakage or fabric damage. be.

This idea was created in view of these problems.
The purpose of this is to provide the tool transmission mechanism with a clutch mechanism that operates at least during drying operation and disconnects the drive motor from the stirring blade, thereby reducing the amount of cloth cut during drying operation.
It is an object of the present invention to provide a drum-type washing machine that can effectively prevent inconveniences such as cloth damage.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 is an outer box having an opening 2 for loading and unloading laundry on the front; 3
4 is a water tank suspended in the outer box 1 via an elastic suspension mechanism 5; 6 is a front surface of the water tank 4; Opening 4a and the opening 2
7 is a rotating drum disposed in the water receiving tank 4, and 8 is a stirring blade disposed approximately at the rear center of the rotary drum 7.

The rotating drum 7 has a cylindrical shape with a large number of small holes 7a in its peripheral wall, and rotates by inserting a hollow drum shaft 9 connected to the center of the back wall into a bearing cylinder 10 fixed to the water receiving tank 4. Possibly supported.

Further, the stirring blade 8 is approximately disk-shaped, and a blade shaft 11 connected to the center thereof is inserted into the drum shaft 9 and is supported so as to rotate with the axis aligned with the rotating drum 7. There is.

The rotating drum 7 and the stirring blades 8 are rotationally driven by a common drive motor 14 via a drum transmission mechanism 12 and a tool transmission mechanism 13.

The drive motor 14 can be switched between high and low speeds, e.g.
It is switchable between pole and four poles, and is attached to the rear lower part of the water receiving tank 4 so that its rotating shaft 14a faces rearward.

The drum transmission mechanism 12 stretches a drum belt 17 between a drum driven pulley 15 fixed to the tip of the drum shaft 9 and a drum drive pulley 16 loosely fitted to the rotating shaft 14a of the drive motor 14. A gear ratio switching mechanism 18 is provided between the drum drive pulley 16 and the rotating shaft 14a.
For example, when the drive motor 14 is rotating at a low speed, the gear ratio switching mechanism 18
The power of a is transmitted to the drive pulley 16 via a speed reduction mechanism (not shown), and when the drive motor 14 shifts to high speed rotation, a centrifugal clutch (not shown) switches to connect the rotating shaft 14a and the drive pulley 16. It is designed to be directly connected.

On the other hand, the tool transmission mechanism 13 includes a tool driven pulley 19 loosely fitted to the tip of the blade shaft 11 and a rotating shaft 1 of the drive motor 14.
A tool belt 21 is stretched between the tool drive pulley 20 fixed to the tool drive pulley 4a, and a clutch mechanism 22 is interposed between the tool driven pulley 19 and the wing shaft 11.

The clutch mechanism 22 includes a front friction plate 23 on the blade shaft 11.
A stator 23 having a front friction plate 23a is fitted and fixed to the blade shaft 11 so that the front friction plate 23a faces the front surface of the implement driven pulley 20, and a movable element having a rear friction plate 24a is attached to the blade shaft 11. 24 is slidably fitted loosely so that the rear friction plate 24a faces the back surface of the tool driven pulley 19, and a spring receiver 25 is fixed to the movable element 24 and the tip of the wing shaft 11. The movable member 24 is biased toward the implement driven pulley 19 by the compression coil spring 26 inserted between the bracket 28 and the plunger 27a of the electromagnetic solenoid 27 arranged behind the blade shaft 11.
When the electromagnetic solenoid 27, of which the plunger 27a protrudes forward, is powered off, the movable element 24 is connected to the tool driven boot by the force of the compression coil spring 26. The rotating force of the driven pulley 19 is applied to the stator 23. When the electromagnetic solenoid 27 is energized and the plunger 27a moves rearward, the movable element 24 moves rearward against the biasing force of the spring 26. As a result, the implement driven pulley 19 is in a free rotation state with respect to the blade shaft 11.

The electromagnetic solenoid 27 is set to be energized during drying operation.

In addition, the diameter ratio of the tool drive pulley 20 and the tool driven pulley 19 is the same as that of the drum drive pulley 16 and the drum driven pulley 15.
When the rotating shaft 14a of the drive motor 14 and the drum drive pulley 16 are directly connected by the speed ratio switching mechanism 18 during dewatering operation, the rotating drum 7 and the stirring blade 8 are set to be the same. It rotates at a speed of .

29 is a tower-shaped support that is fixed to the outer surface of the back wall of the water receiving tank 4 and holds the electromagnetic solenoid 27 in a predetermined position;
30 is a hot air supply device installed on the back wall of the water receiving tank 4, and this hot air supply device 30 operates during drying operation to suck outside air from the hose 31 and heat it. It supplies water to the water receiving tank 4 and further into the rotating drum 7.
Moist air after drying the laundry is discharged to the outside through the hose 32.

With such a configuration, as with the conventional one, by sequentially switching the drive motor 14 between low speed, high speed, and low speed, washing operation, rinsing operation, dehydration operation, and drying operation can be performed successively in sequence. Of course, this is possible, and moreover, during drying operation, the clutch mechanism 22 operates to disconnect the drive motor 14 and the stirring blade 8, so that the stirring blade 8 can freely rotate.

Therefore, even if the laundry that is being dried while being stirred in the rotating drum 7 comes into contact with the stirring blades 8, the stirring blades 8 will rotate freely accordingly, and there will be no inconveniences such as cloth breakage or cloth damage. Effects can be obtained.

The structure and installation of the clutch mechanism are, of course, not limited to those described above; in short, the clutch mechanism is inserted in the middle of the tool transmission mechanism, and at least disconnects the drive motor from the stirring blade during drying operation. It can be anything as long as it can be done.

Furthermore, the clutch mechanism may be operated not only during drying operation but also during dehydration operation.
Since it is possible to omit the important factor of having to equalize the rotational speeds of the rotating drum and stirring blade during dewatering, it is possible to simplify the design or the transmission mechanism.

As is clear from the above description, the present invention has a structure in which the gear transmission mechanism that transmits the rotation of the drive motor to the stirring blades is provided with a clutch mechanism that disconnects the drive motor from the stirring blades at least during drying operation. As a result, during drying operation, the agitation blades are released from their restraints and can rotate freely, so even if the laundry touches both the rotating drum and the agitation blades at the same time, the agitation blades will rotate freely accordingly. Thus, it is possible to provide a drum-type washing machine that does not cause problems of cloth breakage or cloth damage.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a side sectional view showing the entire drum-type washing machine, and FIG. 2 is an enlarged side sectional view of the main parts. In the drawings, 1 is an outer box, 4 is a water tank, 7 is a rotating drum, 8 is a stirring blade, 12 is a drum transmission mechanism, 13 is a tool transmission mechanism, 14 is a drive motor, 22 is a clutch mechanism, and 30 is a heating mechanism. It is a wind supply device.

Claims (1)

[Scope of utility model registration request] 1. A rotating drum having stirring blades inside, a drive motor that rotationally drives the rotating drum and the stirring blades through a drum transmission mechanism and a tool transmission mechanism, and supplying hot air to the rotating drum to dry laundry. Equipped with a hot air supply device to
In a device that performs a drying operation after finishing each operation from washing to dehydration, the tool transmission mechanism is provided with a clutch mechanism that operates at least during the drying operation to disconnect the drive motor and the stirring blade. Drum type 2 featuring
A drum-type washing machine according to claim 1, wherein the clutch mechanism operates during a spin-drying operation and a drying operation.