JPH0634791Y2 - Dehydration washing machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a one-tank dewatering washing machine that performs washing and dewatering in the same tank.

2. Description of the Related Art A conventional dewatering washing machine will be briefly described with reference to FIG. As shown in the figure, the one-tank dewatering washing machine has a water tank 1
Equipped with a washing and dewatering tub 3 having a plurality of dewatering holes 2,
A pulsator 4 for stirring clothes is provided at the center bottom of the washing / dehydrating tank 3. Below the water tank 1, a motor 5
A bearing case 6 having a transmission mechanism is attached by a support plate 7. The support plate 7 is vibration-isolated and supported by rods 9 suspended from the four corners of the outer frame 8. A balancer 10 is provided on the upper portion of the washing / dehydrating tub 3, and a drain valve 11 is provided on the lower portion thereof to connect to a drain hose 12. Drain valve
Reference numeral 11 is operated by a solenoid 13. The solenoid 13 also operates the brake arm 14.

In the figure, 15 is a flange for fixing the washing / dehydrating tub 3 to a dehydrating shaft described later, and 16 and 17 are the motor 5 to the bearing case 6.
Belts and pulleys that transmit power to.

Next, with reference to FIG. 6, the structure inside and around the bearing case 6 will be described. Dehydration shaft 18 is a flange
It is fixed to 15, and a washing shaft 19 is coaxially provided inside. The bearing case 5 houses the brake drum 21 in which the gear reduction device 20 is installed and the gear case plate 22 that forms a gear case together with the brake drum 21. The lower part of the gear case plate 22 forms a dehydration drive shaft 24 in which a washing drive shaft 23 is rotatably installed.

The dewatering shaft 18, the brake drum 21, the gear case plate 22, and the dewatering drive shaft 24 constitute a dewatering rotation transmission mechanism of the washing and dewatering tub 3, and an upper case 25 constituting the bearing case 6.
It is rotatably supported by the inner bearing 26 and the lower bearing 28 in the lower case 27. A case oil seal 42 that seals water in the water tank 1 between the water tank 1 and the dehydration shaft 18 in a watertight manner is press-fitted and fixed to the upper portion of the bearing case 6. Further, the washing shaft 19, the gear reduction device 20, and the washing drive shaft 23 constitute a washing rotation transmission mechanism, and are coaxially provided in the dehydration rotation transmission mechanism.

A belt-shaped brake means 30 having a brake shoe 29 fixed to the inner surface is removably wound around the outer periphery of the brake drum 21. The brake means 30 has one end fixed to the lower case 27 and the other end pivotally supported by a pin 31 attached to the tip of the brake arm 14. The brake arm 14 is rotatably supported by a shaft 32 attached to the lower case 27, and the rotation of the brake arm 14 causes braking means.
30 is operated to be attached to and detached from the brake drum 21. The brake arm 14 is biased in a predetermined direction by a spring 33 or the like, so that the braking means 30 comes into close contact with the brake drum 21. Also, in the lower part of the lower case 27,
A clutch mechanism 34 for switching is provided so that the washing drive shaft 23 is subjected to a rotational force during washing and the dehydration drive shaft 24 is subjected to a rotational force during dehydration.

Since the belt-like braking means 30 has a strong braking force in the winding direction, the washing / dehydrating tub 3
It is used as a braking force when rotating in one direction. But,
At the time of washing, the clothes inside the pulsator 4 which are rotated in accordance with the normal and reverse rotation of the pulsator 4 generate a rotational force in the washing / dehydrating tub 3 due to contact friction. This rotational force is transmitted to the brake drum 21 via the dehydration shaft 18. As mentioned above, the braking means 30
Since a strong braking force can be obtained in the case of rotation in the winding direction, the washing / dehydrating tub 3 does not rotate much, but the braking means
If 30 is in the loosening direction, that is, in the anti-dewatering rotation direction, the washing / dehydrating tub 3 is rotated. When this rotation occurs, the relative rotating force between the clothes and the washing / dehydrating tub 3 is reduced, and the washing force is reduced.

Therefore, a coil spring 36 that can be loosened in the dehydration rotation direction is wound around the outer periphery of the cylindrical portion 35 at the upper portion of the brake drum 21, which is the connection portion to the dehydration shaft 18, to form a unidirectionally rotatable spring clutch. One end of the coil spring 36 is locked to the shaft 32. By the action of the coil spring 36, the rotation of the dehydration shaft 18 and the washing / dehydrating tub 3 when the pulsator 4 is rotated in the anti-dehydration rotation direction is reduced, and a reduction in the cleaning power can be prevented.

By the way, in the structure of the bearing case 6 described above, grease is generally applied to the sliding portion between the cylindrical portion 35 of the brake drum 21 and the coil spring 36 of the spring clutch to ensure smooth sliding. . However, when used for a long time when the temperature is high, such as in summer climate, a part of the grease is melted and dropped, and enters between the brake shoe 29 and the brake drum 21 to adversely affect the braking force. Often. Therefore, to prevent this, the brake drum
The horizontal step portion 35a of 21 was provided with a partition member 39 made of a U-shaped annular flexible material in which an annular rib 37 is formed in the center and a thin-walled lip portion 38 is formed on the inner peripheral edge portion thereof. This partition member
39, since the lip portion 38 is press-fitted into the groove portion 40 provided at the outer peripheral base of the cylindrical portion 35 of the brake drum 21, the annular rib 37 receives the grease dripping from the inner periphery of the coil spring 36, and to some extent the brake shoe 29. I could not go, but it was not perfect.

Problems to be Solved by the Invention However, in the above configuration, the coil spring is
The grease applied to 36 is blown out horizontally due to the centrifugal force during spin-drying, passes over the partitioning member 39, and brake shoes.
May fall to 29. Therefore, even when trying to raise the annular rib 37, there is a problem that the arm 41 of the coil spring 36 interferes and the height cannot be raised to the outside of the coil spring 36.

Means for Solving the Problems The present invention uses a washing shaft provided coaxially in the spin-drying shaft to drive the washing and spin-drying tub in the water tub to rotate in one direction by a spin-drying shaft during spin-drying. In a dehydration washing machine for rotating a pulsator in a washing / dehydrating tub by rotating the pulsator in a reverse direction, a brake drum fixed to a dehydration shaft is provided with a braking means capable of acting a rotational braking force in a dehydration rotation direction,
Roller clutch means is provided above the braking means and exerts a rotational braking force in the anti-dewatering rotation direction. Below the water tank, the brake drum, the braking means and the roller clutch means are housed to form a bearing case. In the upper part of the bearing case, the water tank and the dehydration shaft are sealed with a case oil seal, and
The clutch housing of the roller clutch means is attached to the bearing case so that the roller clutch means is located below the case oil seal, and the lower part of the clutch housing below the roller clutch means is sealed with the clutch oil seal by the clutch oil seal. And a dehydration washing machine.

Effect of the Invention With the above-described configuration, the present invention provides the clutch oil seal that seals the gap between the brake drum and the lower part of the clutch housing even if the grease applied to the roller clutch means part is melted by heat. Since it is provided, it is possible to prevent the grease from entering the braking means below the roller clutch means. Further, the clutch housing can prevent grease from scattering due to centrifugal force. Further, the sliding noise from the roller clutch means portion due to the high speed rotation during dehydration is contained in the bearing case by the case oil seal that seals the bearing case and the water tank and the dehydration tank and the clutch oil seal of the clutch housing. be able to.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. Since the entire structure of the washing machine is the same as that of the conventional example, the same parts are designated by the same reference numerals, detailed description thereof will be omitted, and different points will be mainly described. The difference is that a roller clutch is provided instead of the coil spring 36 in the conventional example shown in FIG. The roller clutch has a clutch housing 50,
It is composed of a roller clutch means 51, a clutch oil seal 52 and the like, and is fixed in the bearing case 6 by a flange portion 50a on the upper portion of the clutch housing 50. In the fixed state, the roller clutch is located below the case oil seal 42 and at the outer peripheral position of the cylindrical portion 35 above the brake drum 21 and above the braking means 30. Then, the roller clutch means 51 has a rotation braking force acting in the anti-dehydration rotation direction.

The roller clutch means 51 is a clutch housing 50.
As shown in FIG. 3 and FIG. 4, the cylindrical roller 54 is provided in the ratchet groove 53 formed continuously with the case 51a of the roller clutch means 51. It is rotatably mounted. The rollers 45 are in contact with the outer peripheral surface of the cylindrical portion 35 of the brake drum 21, respectively. Grease is applied to the circumscribing surface for the purpose of preventing friction due to rotation and rust prevention.

The clutch oil seal 52, as shown in the figure, is an annular body, and an annular portion that protrudes inward at the lower portion of the inner peripheral surface.
52a, an annular portion 52b protruding inward in a triangular shape is provided at the center of the inner peripheral surface, and a spring 52c is provided on the back of the annular portion 52b. This clutch oil seal 52
Is press-fitted and fixed to the lower part of the clutch housing 50 below the roller clutch means 51 to seal the gap with the brake drum 21. By the sealing of the clutch oil seal 52 and the sealing of the case oil seal 42, the roller clutch means 51 is arranged in a sealed state in a space surrounded by the bearing case 6 and the clutch housing 50. .

In the above structure, the washing and dewatering operations are basically the same as those of the conventional example, but the roller clutch does not rotate in the dewatering rotation direction during dewatering as shown in FIG. 4 (a). Each cylindrical roller 54 is released from the constraint of the ratchet groove 53 and can rotate freely. At this time, the sliding noise generated by the vigorous sliding of the rollers 54, the cylindrical portion 35 and the ratchet groove 53 by the high speed dehydration rotation is the case oil seal 42 and the clutch oil seal.
It is sealed by 52 and does not leak out of the bearing case 6. Further, as shown in FIG. 4 (b), the clothes rotated by the forward and reverse rotation of the pulsator 4 at the time of washing causes contact and friction to cause the washing / dehydrating tub 3 to rotate in the anti-dewatering rotation direction, so that washing / draining can be performed. When the water tank 3 is rotated in the loosening direction of the braking means 30, each cylindrical roller 54 of the roller clutch means 51 is pressed against the cylindrical portion 35 by the ratchet groove 53, so that the spinning shaft 18 and the washing / dehydrating tank 3 rotate. Is to prevent.

Effect of the Invention According to the present invention, since the clutch oil seal is provided below the roller clutch means under which the rotational braking force acts in the anti-dehydration rotation direction, the grease in the roller clutch means is melted by heat. Even in this case, the clutch oil seal is used to prevent it, and it is possible to reliably prevent the brake oil from entering the brake means below the roller clutch means. Further, the clutch housing can surely prevent grease from scattering due to centrifugal force.

Further, since the roller clutch means is positioned between the case oil seal and the clutch oil seal that seal the bearing case, the water tank and the dehydration shaft in a watertight manner, the sliding noise from the roller clutch means portion due to the high speed rotation during the dehydration rotation is generated. ,
It is possible to prevent the sound from leaking outside by containing it between the case oil seal and the clutch oil seal.

[Brief description of drawings]

FIG. 1 is a sectional view showing a structure of a bearing case portion of a dewatering washing machine according to an embodiment of the present invention, FIG. 2 is a half cut sectional view of a main portion of a coaxial bearing case portion, and FIG. A sectional perspective view of a roller clutch portion in the case portion,
FIG. 3 (b) is a sectional view of a clutch oil seal of the roller clutch portion, FIG. 4 (a) is a partial sectional view showing a state of the roller clutch when not braking, and FIG. 4 (b) is the roller. FIG. 5 is a partial sectional view showing a state when the clutch is braked, FIG. 5 is a sectional view showing a configuration of a general dewatering washing machine, and FIG. 6 is a sectional view showing a configuration of a bearing case portion of the dewatering washing machine. 1 ... Water tank, 3 ... Washing / dewatering tank, 6 ... Bearing case, 18 ... Spinning shaft, 19 ... Washing shaft, 20 ... Gear reduction device, 21 ... Brake drum, 23 ... Washing drive shaft ,twenty four……
Dehydration drive shaft, 30 ... Brake means, 35 ... Cylindrical part, 36 ...
… Coil spring, 42… Case oil seal, 50…
… Clutch housing, 51 …… Roller clutch means, 52
...... Clutch oil seal, 53 …… Ratchet groove, 54…
… Cylindrical roller.

Claims (1)

[Scope of utility model registration request] 1. A pulsator in a washing / dehydrating tub by a washing shaft coaxially provided in the dewatering shaft when the washing / dehydrating tub in the water tub is rotationally driven in one direction by a dewatering shaft during dewatering. In a dewatering washing machine in which the machine is rotated forward and reverse, the brake drum fixed to the dewatering shaft is provided with a braking means capable of exerting a rotation braking force in the dewatering rotation direction, and an anti-dewatering located above the braking means. A roller clutch means for exerting a rotational braking force in the rotation direction is provided, and a bearing case for accommodating the brake drum, the brake means and the roller clutch means is provided below the water tank. The case oil seal seals between the water tank and the dehydration shaft, and the roller clutch means is located below the case oil seal. Thus, the dewatering washing machine is characterized in that the clutch housing of the roller clutch means is attached to the bearing case, and the lower part of the clutch housing below the roller clutch means is sealed with the brake drum by a clutch oil seal.