JPS605319B2 - dehydration washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a single-coat type dehydrating washing machine, in which a washing shaft having a pulsator fixed to the upper part and a dehydrating shaft having an inner tank fixed to the upper part are provided in the same D-circular shape. The purpose is to protect the upper parts of both shafts from liquid leakage and intrusion of washing liquid by means of protective caps that are liquid-tightly fixed to the washing shaft.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, 1 is the main body of the washing machine, which is made of thin steel plate and whose surface is coated to prevent rust, which covers the sides of the dehydrating washing machine from all sides, and the top plate 3 has an input port 2 for loading and unloading laundry. Legs 4 that touch the floor are fixed to the four corners of the bottom. Reference numeral 5 denotes a cylindrical inner tank with a large number of dehydration holes 6 on the side wall, which serves as both a washing tank and a dehydration tank, and a circular pulsator 8 with a sandalwood blade 7 is provided in the center of the bottom, and an upper sekiguchi part is installed. A balance wet 9 is fixed to the inner peripheral side wall of the housing 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 a dehydration shaft oil seal 14, an upper ball bearing housing 16 that holds an upper ball bearing 15, and a lower ball bearing housing 18 that holds a lower ball bearing 17 are attached to the upper part of the outer tank 11. A ball bearing housing 16 fixed with screws 19 is attached to the bottom plate 13 with bolts 20 and nuts 21. At the bottom of the inner tank 5, a coupling 24 is fixed to the lower part of the pulsator 8 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 dehydration shaft 25 with a nut 26. Fix it.

A dehydration shaft 25 connected to the bottom of the inner tank 5 is held by a dehydration shaft oil seal 14 and both upper and lower ball bearings 15 and 17.

Inside the hollow of the dehydrated pulp 25, a washing shaft oil seal 27,
An upper bearing metal 28 and a lower bearing metal 29 are press-fitted and fixed, respectively, and a washing shaft 31 whose upper part is fixed is held by a pulsator 8 and a screw 301. A boss 33 of a washing pulley 32 is fixed to a pin 34 at the lower part of the washing shaft 31, and this is connected via a belt 37 to a motor pulley 36 of a motor 35 fixed to the lower side of the bottom plate 13. 32 is rotated by a motor.

A coiled 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, and the lower end spring 39 is cylindrical and has a large number of teeth 40 on the outer periphery. It engages with the operation tube 41. A clutch lever 43 is rotatably mounted on a lever receiver 42 provided on the side wall of the lower ball bearing housing 18 via a lever pin 44, and a clutch pawl 46 is provided via a pawl pin 45 provided at the tip of the clutch lever 43. A spherical receiver 47 is provided on the outside of the bottom plate 13.
is formed and supported by the upper part of the main body 1 via a spring 48 and a rod 49 in a vibration-proof manner. 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, when washing, the motor 35 drives the motor pulley 36, the belt 37, and the washing pulley 32.
, the pulsator 8 is rotated via the washing shaft 31, and the outer tub 1 is
A washing liquid is held in the inner tub 1, and the laundry put into the inner tub 5 is washed by a rotating water flow generated in the inner tub 5.

At this time, the clutch 46 of the clutch lever 43 pushes up the teeth 40 of the operation cylinder 41 to loosen the clutch spring 38 so that the rotation of the boss 33 of the washing pulley 32 is not transmitted to the dehydration shaft 25 side. . At the time of dewatering, when the clutch catch 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.

A feature of the present invention is to improve the durability of the washing shaft oil seal portion that liquid-tightly seals the washing shaft, thereby improving the reliability of the seal.

As a seal structure for the secondary washing rotation shaft, the dehydration shaft 2
A seal lip 51 made of nitrile rubber is encased inside the upper hollow part of 5 by a spring 52, and a binding force is applied to provide a liquid-tight seal. In order to improve the reliability of this system, it is necessary to prevent dust from entering, and for this purpose, a dust cap 53 and a dust lip 54 are provided to provide double or triple protection to prevent water leakage. , there was a problem that it was not enough. This is because if the washing shaft is scratched during handling, the seal lip will be damaged by the scratch and water will leak. On the other hand, small scratches on the tip of the seal lip during processing can also cause water leakage. However, these scratches, whether on the shaft side or the seal lip side, must be inspected visually from the entire surface and all around, which is 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, easily damaging the lip and causing water leakage. Furthermore, recently there has been a remarkable improvement in detergents (especially detergents that are resistant to oil stains).
It is easy to mess up the grease that is placed between the lip of the oil seal for lubrication, resulting in poor lubrication and water leakage. For this reason, the present invention has a structure that normally prevents water from entering the oil seal, and a structure that prevents water from leaking even if there is only a slight scratch. In other words, washing shaft 3
1, a protective cap 56 is placed on top of the stepped portion 55, a post portion 57 of the pulsator 8 is further placed on top of this, and the screw 30 is used to secure this to the upper end of the washing shaft 31. Tighten and secure. The cap 56 is made by drawing a stainless steel plate into an inverted bowl shape, and molding it with rubber as a sealing member 59 around the lower surface of the washing shaft insertion hole 58 in the center of the upper surface. It has an annular rib 59a on the lower part of the periphery, and an annular lip 60 extending below the rib.

64 is an annular recess provided in the lip portion to facilitate insertion of the shaft 31.

The body part 61 of the cap 56 has a larger diameter than the upper part of the dehydration shaft 25, and encloses this part including the nut 26 and the boss part 62 of the coupling 24. In the above configuration, the bottom edge of the washing shaft insertion hole 58 of the cap 56 has a sealing member 59 formed integrally with the annular rib 59a and the annular lip portion 60.
Place this cap on top of the
When the washing shaft 31 is tightened and fixed, the stepped portion 55 of the washing shaft 31 and the annular rib portion 59a of the sealing member 59 of the cap 56 come into close contact to form a liquid-tight seal, and the outer periphery of the laundry ball below the stepped portion 55 is connected to the lip portion 601 of the trowel. This part can also be sealed liquid-tight for bondage. Therefore, by inserting and fixing the cap 56 into the stepped portion 55 of the washing shaft 31, the stepped portion 55 and the outer periphery of the washing shaft are reliably sealed. The chest 6 of this cap 56
1, the lower end of the dehydration shaft 25 overlaps the upper end 63 of the dehydration shaft 25 by a height h, so even if washing liquid is poured into the outer tub 11 during washing, an air pocket is formed above the cap 56, and the water is not dehydrated. Water does not reach the upper end of the shaft and does not reach the washing shaft oil seal.

By fixing the cap to the washing shaft and forming an air reservoir at the upper end of the spindle, water leakage can be reliably prevented. Note that the overlap height h' is
When the cap rotates with the pulsator during washing, air leaks out from the bottom of the cap and water enters the inside of the bottom of the cap, so in order to secure the air reservoir, it is necessary to use 50 ribs outside the cap.
RPM 75. p. At around m, two or more proboscises were required.

When washing, this cap can be inserted into the washing shaft and screwed onto the pulsator to ensure a secure seal, and can also be used as a holder for the balsator boss.

In other words, the upper surface of the cap placed on the stepped portion can receive the pulsator and is securely fixed. Conventionally, a configuration has been proposed in which a cylindrical part is provided integrally on the lower surface of the pulsator to cover the upper part of the dehydration shaft, but since the pulsator and the washer are not sealed, water gets in and it is not sufficiently effective.

However, in the present invention, the cap ensures liquid tightness and can also be used as a pulsator receiver. In addition, a relief 64 consisting of an annular recess with a diameter larger than the through hole is provided between the cap and the rib, but this is because when the cap is inserted from above, the outer periphery of the stepped portion of the washing shaft is This prevents the end from biting into the lip, making insertion difficult, and allows for smooth insertion.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a one-tank washing machine, Fig. 2 is an enlarged sectional view of main parts of a washing machine according to an embodiment of the present invention, Fig. 3 is a perspective view showing a protective cap, and Fig. 4 is a cap FIG. 5...Inner tank, 8...Pulse evening, 25
... Dehydration shaft, 31 ... Washing shaft, 56 ... Protective cap, 58 ... Through hole through which the washing shaft passes, 5
9... Seal member, 59a... Annular rib portion, 60... Annular lip portion, 64... Annular recess. Figure 2 Figure 1 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. A washing shaft with a pulsator fixed to the top and a dehydration shaft with an inner tub fixed to the top thereof are provided concentrically inside and outside, and a sealing member is used to secure the top of the washing shaft in a liquid-tight manner. A dehydrating washing machine in which the upper outer side of the dehydrating shaft, which has a washing shaft oil seal provided inside the hollow interior thereof, is covered by a cap with a gap provided therein. 2. A through hole through which the washing shaft passes is provided in the center of the top surface of the protective cap, and a flexible sealing member is integrally formed on the periphery of the lower surface of the through hole, and this sealing member is connected to the cap provided on the washing shaft. The dehydrating washing machine according to claim 1, comprising an annular rib portion in contact with the mounting step, and an annular lip portion connected below the rib portion and in close contact with the outer circumferential surface of the washing shaft. 3. The dehydrating washing machine according to claim 1 or 2, wherein the protective cap is placed on the stepped portion of the washing shaft and also serves as a receiving member for the pulsator fixed above the stepped portion. 4. The dehydrating washing machine according to claim 2, wherein the sealing member has an annular recess having a larger diameter than the through hole between the rib portion and the lip portion.