JPS605904Y2 - dehydration washing machine - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a single-tank dehydrating washing machine that is equipped with a washing tub and a dehydrating tank. The purpose is to effectively prevent water leakage.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the figure, reference numeral 1 is a main body made of a thin steel plate coated with a thin steel plate that covers the sides of the dehydrating washing machine from all sides and is coated to prevent rust. The legs 4 in contact with the floor are fixed.

Reference numeral 5 denotes a cylindrical inner tank with a large number of dehydration holes 6 on the side wall, which serves both as a washing tub and a dehydration tank.A circular rotary blade 8 with blades 7 is provided in the center of the bottom, and the upper opening is A balance weight 9 is fixed to the inner peripheral side wall with screws 10.

Reference numeral 11 denotes a cylindrical outer tank surrounding the inner tank 5, which holds the washing liquid during washing and receives the dewatering liquid during spin-drying.

An outer tank cover 12 is attached to the upper opening of the outer tank 11 to cover the space between the inner tank 5 and the outer tank 11.

A bottom plate 13 is provided at the lower part of the outer tank 11, and an upper ball bearing housing 16 that holds the oil seal 14 of the dehydration shaft and an upper ball bearing 15, and a lower ball bearing housing 18 that holds the lower ball bearing 17 are connected to the upper ball bearing. Screw 19 to housing 16
The bottom plate 1 is fixed at the bottom of the outer tank 11.
3 with bolts 20 and nuts 21.

A coupling 24 is fixed to the lower part of the rotary blade 8 at the bottom of the inner tank 5 with a bolt 23 via an inner tank holding plate 22, and is screwed to a step formed in the upper part of a hollow dewatering shaft 25 with a nut 26. do.

Further, a dewatering shaft 25 connected to the bottom of the inner tank 5 is held by a dehydrating shaft oil seal 14 and upper and lower artist bearings 15 and 17.

A washing shaft oil seal 27 is located inside the hollow interior of the dehydration shaft 25.
, a washing shaft 3 in which the upper bearing metal 28 and the lower bearing metal 29 are press-fitted and fixed, and the upper part is fixed by the rotary blade 8 and the screw 30.
1 are held concentrically.

A boss 33 of a washing pulley 32 is fixed to the lower part of the washing shaft 31 with a pin 34, and is connected to a motor pulley 36 fixed to the lower side of the bottom plate 13 via a belt 37, and the pulley 32 is rotationally driven by the motor. .

A helical clutch spring 38 is provided on the outer periphery of the boss 33 of the washing pulley 32 and the lower end outer periphery of the dewatering shaft 25.
The claw 39 at the lower end is formed into a cylindrical shape, and has many teeth 4 on the outer periphery.
It engages with the operation barrel 41 having a 0.

Lever bearing 42 provided on the side wall of the lower ball bearing housing 18
The clutch lever 43 is rotatable via a lever pin 44, and a clutch claw 46 is provided via a claw pin 45 provided at the tip of the clutch lever 43.

A spherical bearing 47 is formed on the outside of the bottom plate 13, and vibration-proof support is provided from the upper part of the main body 1 via a spring 48 and a rod 49.

A brake wheel 50 is fixed to the dehydration shaft 25 and is used to brake when the dehydration is completed.

In the above configuration, during washing, the motor 35 is driven to rotate the rotary blade 8 via the motor pulley 36, belt 37, washing pulley 32, and washing shaft 31, and the washing liquid is held in the outer tub 11 and thrown into the inner tub 5. The washed laundry is washed by the rotating water flow generated in the inner tub 5.

At this time, the clutch claw 46 of the clutch lever 43 pushes the teeth 40 of the operation cylinder 41, and the clutch spring 38
is kept loose so that the rotation of the boss 33 of the washing pulley 32 is not transmitted to the dewatering shaft 25 side.

At the time of dewatering, when the clutch claw 46 is released from the teeth 40 of the operation cylinder 41 and the clutch spring 38 is rotationally driven toward the tightening side, the inner tub 5 is rotated via the dewatering shaft 25, and the laundry is centrifugally dehydrated.

The feature of the present invention is to improve the durability of the dehydration shaft oil seal portion that seals the dehydration shaft in a liquid-tight manner, and to improve the reliability of the seal.

Conventionally, as a seal structure for the dehydration rotation shaft, a seal lip 51 made of nitrile rubber that is in contact with the outer periphery of the dehydration shaft 25 is encased by a spring 52, and a tension force is applied to the seal lip for sealing.

In order to improve the reliability of this seal, it is necessary to prevent the ingress of dust and therefore the dust lip 53
Although they provided double and triple protection to prevent water leakage, they were not sufficient.

That is, if a scratch occurs on the dewatering shaft during handling or the like, the seal lip is damaged by the scratch and water leaks.

On the other hand, if a small scratch occurs on the tip end of the seal lip during machining, it will still cause water leakage.

Moreover, inspection of these scratches, whether on the shaft side or the seal lip side, had to be done visually over the entire surface and circumference, which was extremely difficult.

Furthermore, among the foreign substances that adhere to the laundry and enter, hard and fine powders such as glass powder and metal powder enter the tip of the seal lip together with water, making it easy to damage the lip and cause water to leak.

Furthermore, detergents have recently improved significantly, and detergents that are particularly resistant to oil stains tend to damage the grease that is inserted between the lip of the oil seal and the shaft for lubrication, resulting in poor lubricity and water leakage.

For this reason, the present invention has a structure that normally prevents water from entering the oil seal, and even if there is only a slight scratch,
This is to prevent water leakage.

That is, a stepped portion 54 is provided on the upper part of the dehydration shaft 25, a cap 55 is placed on the stepped portion 54, a boss portion 56 of the coupling 24 is positioned further above the stepped portion 54, and the nut 26 is placed on top of the stepped portion 54.
It is tightened and fixed to the upper part of the dehydration shaft 25 with a screw.

The cap 55 is made by drawing a stainless steel plate into an inverted cup shape, providing a dehydration shaft through hole 57 in the center of the upper surface, and integrally forming a sealing member 58 such as rubber around the lower surface of this hole. The rubber integrally forms a flange portion 58a that is in close contact with the step portion 54 located on the lower side of the periphery of the hole 57, and an annular lip 59 that hangs down from the flange portion 58a and is in close contact with the outer peripheral surface of the shaft on the lower side of the step.

The dewatering shaft oil seal 14 has a dust lip 53, an upper seal lip 50, an upper spring 61 enclosing these, a lower seal lip 51, a lower spring 52 enclosing the same, and an auxiliary lip 62 relative to the dehydrating shaft 25. These seal the shaft 25.

Further, the outer tank 11 is sealed with an upward lip 63.

This dehydration tank oil seal 14 is made by press-fitting an integral part of a dust lip 53, an upper seal lip 60, and an upper spring 61 into an integral part consisting of a lip 63, a lower seal lip 51, a lower spring 52, and an auxiliary lip 62. It is a combination of both.

The body portion 64 of the cap 55 encloses the dust lip 53, upper seal lip 60, and upper spring 61 of the dehydration shaft oil seal 14.

As shown in FIGS. 3 and 4, the cap 55 mounting portion of the dehydration shaft 25 has a small diameter portion above the stepped portion 54 with a nut 2 at the upper end.
6 is formed, and cutout planes 66 are provided in at least one location, four locations in this example, in the longitudinal direction along the small diameter portion.

Further, at the boundary between the stepped portion 54 and the small diameter portion, a groove 67 having a diameter equal to or smaller than the cutout plane 66 is formed over the entire circumference.

On the other hand, the cap 55 shown in FIGS. 5 and 6 has a through hole 5
7 is inserted into the small diameter part above the stepped part 54 of the dewatering shaft 25 in a loose manner according to the shape of the shaft, and rotated slightly to correspond to the groove 67 provided above the stepped part 54, thereby opening the hole 57. A portion corresponding to the notch plane 66 on the shaft side of the shaft 25 fits under the small diameter portion of the shaft 25 and can be installed so as not to come out above the groove 67.

FIGS. 7 and 8 are diagrams showing these attachments.

In the above configuration, the dehydration shaft through hole 57 of the cap 55
Rubber, which is a flexible sealing member, is attached to the lower periphery of the stepped portion 5.
Since the flange portion 58a and the lip 59 which are in contact with the dehydration shaft 25 are integrally formed, when the coupling 24 is placed on the stepped portion 54 of the dehydration shaft 25 and fixed by tightening the nut 26, the dehydration shaft 25 is fixed. The stepped portion 54 and the flange portion 58a of the sealing member 58 of the cap 55 come into close contact to liquid-tightly seal this portion, and the outer periphery of the shaft on the lower side of the stepped portion 54 is tightly bound by an annular lip 59 to receive the seal. Therefore, cap 5
5 and the dehydration shaft 25 are securely sealed.

Furthermore, the lower end of the body 64 of the cap 55 overlaps the dust lip 53 provided at the upper end of the dehydration shaft oil seal 14 by a length h, so that when washing liquid enters the outer tub 11, the cap 55 An air pocket is formed above the dust lip 53, and this air pocket prevents water from penetrating to the oil seal.

By liquid-tightly fixing the cap to the dehydration shaft and forming an air pocket above the oil seal in this manner, water leakage can be reliably prevented.

By placing the coupling on the cap from above and fixing it with a nut, the cap forms an air pocket and also functions as a support for the coupling.

That is, the upper surface of the cap placed on the stepped portion can receive the coupling that fixes the washing and dehydrating tub, so that the cap is securely fixed.

Furthermore, the lip 5 of the sealing member 58 provided on the cap 55
9 is provided with a relief 68 by increasing the diameter of the lower side of the flange 58a of the hole 57, but this is because when the cap is inserted from above, the stepped outer peripheral end of the dehydration shaft bites into the lip of the sealing member, preventing insertion. This is designed to prevent deterioration and allow for smooth insertion.

The bearing-related parts of the dehydration shaft are assembled first, and the dehydration shaft is inserted into the bottom hole of the outer tank from below, fixed to the bottom plate 13 with bolts 20 and nuts 21, and then the coupling and screws are inserted from above. It is preferable to fix the nut 26.

At this time, since the cap is provided to cover the upper part of the oil seal, the oil seal can be protected without damaging the shaft by hitting the tip of the dust lip when inserting the shaft or removing the spring.

Furthermore, since the cap engages with the annular groove of the dehydration shaft, it has the advantage of not coming off or tipping easily, and since no water leaks from the oil seal, it improves durability and reliability. can also be increased.

As is clear from the above embodiments, according to the present invention, water is prevented from flowing into the oil seal that makes the outer periphery of the dehydration shaft liquid-tight, with a simple structure in which a cap is liquid-tightly fixed to the dehydration shaft. This has been achieved, and its practical value is extremely large.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing a dehydrating washing machine, Fig. 2 is a partially enlarged sectional view showing the main parts of the washing machine in an embodiment of the present invention, Fig. 3 is a top view showing the dehydrating shaft, and Fig. 4 is a longitudinal sectional view showing a dehydrating washing machine. Its upper side view,
Figure 5 is a top view showing the cap, Figure 6 is its sectional view,
FIG. 7 is a top view of the cap attached to the dehydration shaft, and FIG. 8 is a partially sectional side view thereof. 5... Washing tub and dehydration tank, 14... Oil seal, 25... Dehydration shaft, 51, 60...
...Annular lip portion of seal, 52, 62...
Spring, 54...Step part, 55...
Cap, 56...Coupling boss part, 5
7... Dehydration shaft through hole, 58... Seal member, 58a... Flange portion, 59...
・Annular lip, 65...Threaded part, 66...
...Notch provided in the small diameter part, 67... Annular groove part.

Claims (5)

[Scope of utility model registration request] (1) An oil seal is provided that liquid-tightly seals the outer periphery of the dehydration shaft on which the washing tub and dehydration tank is fixed, and a cap is provided on the top of this oil seal and is fluid-tightly fixed to the dehydration shaft. A dehydrating washing machine in which a lower end of the oil seal is overlapped with a lower end of the upper lip of the oil seal. (2) A step is provided at the top of the dehydration shaft, and a dehydration shaft through hole is formed in the center of the top surface of the cap, and an annular lip portion is provided at the lower peripheral edge of the through hole in contact with the outer periphery of the dehydration shaft below the step. A dehydrating washing machine according to claim 1, which is integrally provided with a flexible sealing member having a flexible sealing member. (3) The dehydrating washing machine according to claim 1 or 2, wherein the cap also serves as a support for a coupling fixed to the center of the bottom of the washing tub and dehydrating tub. (4) The dewatering shaft has at least one notch in the small diameter part above the step, and the space between the small diameter part and the step has the same diameter as the notch or a diameter larger than this. A utility model comprising a small-diameter annular groove, and a dehydration shaft through hole formed in the center of the upper surface of the cap has a shape that corresponds to the cross-sectional shape of the small diameter portion of the dehydration shaft and engages with the annular groove by rotation. A dehydrating washing machine according to registered claim 2. (5) Any one of claims 1 to 4 for registering a utility model in which the oil seal includes an annular lip portion that seals the outer periphery of the dehydration shaft and an elastic member that binds this lip portion to the dehydration shaft side. Dehydrating washing machine as described.