JPH0228359B2 - ICHISOSHIKIDATSUSUISENTAKUKI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a so-called single-tank dehydrating washing machine equipped with a washing and dehydrating tub.

Conventional structure and its problems Conventionally, as this type of single-tank dehydrating washing machine, the first
A configuration as shown in the figure is known. In the figure, 1 is the main body of the dehydrating washing machine, and 2 is a panel section installed at the rear of the upper part of the main body 1, which has a built-in time switch and the like. Reference numeral 3 denotes an outer tank which is supported in vibration isolation by a suspension 4 in the main body 1, 5 is a clothes input port provided at the upper part of the outer tank 3, and 6 is a laundry/washing tank rotatably supported in the outer tank 3. A balance weight 7 is attached to the peripheral wall of the upper opening of the dehydration tank. The peripheral wall of the washing and dewatering tank 6 is tapered to become larger as it goes upward, and is provided with a large number of drain holes 8 located below the balance weight 7. Reference numeral 9 denotes a plurality of stirring protrusions provided vertically on the inner peripheral wall of the washing and dehydrating tank 6; 10 is a shaft of the washing and dehydrating tank 6; inside the shaft 10 there is a metal 11 and a ball pairing 12; and an oil seal 13, and a ball pairing 14 on the outside.
and the oil seal 15 is press-fitted. 16 is a motor attached to the outer bottom of the outer tank 3, and the power of this motor 16 is supplied to the motor pulley 17 and the V-belt 1.
8 and a pulley 19 to the shaft 10 of the washing and dewatering tub 6. Reference numeral 20 denotes a truncated cone-shaped agitator, which is attached to a shaft 21 rotatably supported by a metal 11, a ball bearing 12, and an oil seal 13 disposed inside the shaft 10 of the washing/dehydration tank 6, and is It protrudes from the center of the inner bottom of the dewatering tank 6. This agitator 20 is constructed by the action of a ratchet wheel 22 provided on a shaft 21, an arm 23 fixed to the bottom of the outer tub 3, a claw 24 thereof, and a spring 25 biased so that the claw 24 engages with the ratchet wheel 22. When the dehydration tank 6 rotates to the right, it rotates freely, and when it rotates to the left, the rotation is blocked.
26 is a small blade integrally formed on the outer periphery of the stirring body 20. The motor 16 is configured to be able to change its rotational speed by changing the number of poles, and is configured to have a low speed for washing machines and a high speed for spin-drying. 27 is a drain hose connected to the bottom of the outer tank 3, and the drain port 2
8 is attached to the side wall of the main body 1.

The one-tank dehydrating washing machine with the above configuration causes less fabric damage compared to a method that washes by rotating only the agitator, but it has a complicated structure because it has a two-axis configuration of the agitator shaft and the washing/dehydrating tank shaft. Furthermore, since there is no rotational movement by the stirring body itself, and cleaning is always performed only by relative movement with the laundry, there is a problem that the cleaning performance is inferior to that of conventional whirlpool type washing machines.

Purpose of the Invention The present invention simplifies the structure by arranging the washing/dehydration tank and the stirring body on a single shaft, and also achieves high cleaning performance by considering the relationship between the washing/dehydration tank and the stirring body. The purpose is to provide a tub-type dehydrating washing machine.

Structure of the Invention The one-tub dehydrating washing machine of the present invention includes a washing/dehydrating tub, an agitator, a forward/reverse motor that rotates the washing/dehydrating tub and the agitator, and a motor that rotates the washing/dehydrating tub and the agitator. It consists of a single shaft that is driven, fixes the agitator, and connects the washing and dehydrating tank via a one-way clutch, and the washing and dehydrating tank is resistant to one-way rotation of the agitator. , is fixed to the shaft and rotates in the same direction at the same speed, and is rotatable relative to the shaft when rotating in the opposite direction.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 2 and 3, parts that are the same as those in the conventional example are given the same reference numerals and their explanations are omitted.

In the figure, reference numeral 29 denotes a drive mechanism section including a motor 49 capable of forward and reverse rotation, the details of which are shown in FIG.

In the figure, 30 is a shaft having a hollow part 35,
For example, the washing and dewatering tank 6 is fixed via a one-way clutch 31 consisting of a shell-shaped roller clutch or the like,
A stirring body 20 is fixed to the tip. 32, 33
are oil seals provided at both ends of the one-way clutch 31.

Reference numerals 34 and 34' designate small holes for air inflow provided at the upper and lower ends of the shaft 30, which are led through a hollow part 35 and from the air trap part to a pressure switch (not shown) by a pipe 37. The water level in the dewatering tank 6 is detected as a change in air pressure.

An oil seal 38 and ball pairs 39 and 40 are press-fitted onto the outside of the shaft 30 to provide a watertight structure with the bottom of the outer tank 3 and to support the shaft 30.
41 is a ball pair for the motor, 42 is a reduction gear, and a compression spring 43 urges the rotor 44 of the motor 49 downward. 45 is motor 4
A stator 9, a brake shoe 46 that performs braking by contact with the rotor 44, and frames 47 and 48 of a motor drive section.

To explain the operation in the above configuration, motor 4
When power is applied to the rotor 9, the rotor 44 is attracted to the stator 45 side by magnetic attraction force and rotates. When the rotor 44 of the motor 49 is rotated in the forward direction (rotation direction during dehydration), the rotation of the rotor 44 of the motor 49 is reduced through the reducer 42 and transmitted to the shaft 30. At this time, the washing/dehydration tub 6 is fixed to the shaft 30 by the one-way clutch 31, and rotates in the same direction and speed as the rotational direction of the agitator 20, giving an agitating action by the inertia of the laundry and the washing water. . Next, when the motor 49 is rotated in the opposite direction (the direction opposite to the rotation direction during dehydration), the rotation of the rotor 44 of the motor 49 is decelerated via the speed reducer 42.
is transmitted to the shaft 30. At this time, one-way clutch 3
1, the washing and dewatering tank 6 is configured to freely rotate with respect to the shaft 30, so that the stirring blade 26
Depending on the state of contact between the agitator 20 and the laundry, the agitator 20 rotates later than the agitator 20, and while the cloth moves horizontally when rotating in the forward direction, it moves vertically when rotating in the reverse direction. Therefore, by repeating forward and reverse rotation of the motor 49, damage to the cloth can be suppressed and cleaning performance can be improved.

In addition, regarding water level detection, which has traditionally been a problem when using a non-porous washing and dehydrating tank, since the shaft 30 is a single shaft, a hollow part 35 is provided at the center of the shaft, and a hollow part 35 is provided at the center of the agitator 20. The air pressure in the air reservoir can be easily detected by guiding the air from the air trap section 36 to the pressure switch through the small hole 34 for air inflow and the pipe 37.

Effects of the Invention As is clear from the above embodiments, the single-tank dehydrating washing machine of the present invention has a single shaft for the agitator and the washing/dehydrating tank, so that the structure can be simplified.
Further, the washing and dewatering tub can be set in a fixed state or in a freely rotatable state depending on the direction of rotation of the shaft via a one-way clutch. That is, during forward rotation, the stirring body and the washing/drying tub are rotated in the same direction and at the same speed, and the entire laundry is agitated by the washing/drying tub. At this time, since the load increases, the rotational speed can necessarily be kept low. In addition, when the rotation is reversed, only the agitator is rotated, and the washing and dehydrating tub becomes freely rotatable, and the laundry near the agitator is agitated by the agitator. At this time,
Since the load is small, the stirring body can be rotated at a higher rotational speed than during normal rotation. in this way,
When rotating in the forward direction, the entire laundry is spread around the outer periphery and agitated lightly, and when rotating in the reverse direction, the agitator section performs relatively strong agitation, thereby increasing cleaning performance while minimizing damage to the fabric. ,Also,
By changing the load condition through forward and reverse rotation, the temperature rise in the motor can be reduced. By setting the rotation direction in the fixed state to the dehydration rotation direction, damage to the cloth can be prevented during dehydration by eliminating the difference in rotational speed between the washing/dehydration tank and the stirring body.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing a conventional single-tank dehydrating washing machine, Fig. 2 is a longitudinal sectional view of a single-tank dehydrating washing machine showing an embodiment of the present invention, and Fig. 3 is a single-tank dehydrating washing machine. FIG. 3 is a detailed sectional view of the drive mechanism of the machine. DESCRIPTION OF SYMBOLS 1...Main body, 6...Washing/dehydration tank, 20...Agitator, 29...Drive mechanism section, 30...Shaft, 31...
...One-way clutch, 49...Motor.

Claims (1)

[Claims] 1 An outer tank elastically supported within the main body, a washing/dehydration tank rotatably supported within the outer tank, an agitation body provided in the washing/dehydration tank, and the washing/dehydration tank and the agitation body. It consists of a motor that can be rotated in forward and reverse directions, and a single shaft that is driven by this motor via a speed reducer, fixes the agitating body, and connects the washing and dewatering tank via a one-way clutch. , the washing and dewatering tank is fixed to the shaft and rotates in the same direction and at the same speed when the agitator rotates in one direction, and is rotatable with respect to the shaft when the agitator rotates in the opposite direction. A single-tank dehydrating washing machine that rotates freely.