JPS5825171B2 - Dehydration tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a dehydration tank, and particularly relates to the shape of the balance ring attached to the upper end of the dehydration tank.

In the dehydration tank of a dehydrator or a washing machine that performs washing and dehydration in a single dehydration tank, a large unbalance occurs as a centrifugal force during the dehydration rotation due to loading of dehydrated items or unevenness of the laundry items during washing. Conventionally, a balance ring filled with solid or liquid is attached to the top of the dehydration tank.
It has an inertial force that compensates for the centrifugal force caused by unbalance.

Therefore, the balance ring at the top of the dehydration tank is fixed to the dehydration tank with 6 to 8 screws to prevent it from coming off due to inertial force.

However, using six to eight screws to assemble the dewatering tank and the balance ring has been a bottleneck in improving productivity.

Furthermore, since there is always a water atmosphere in the dehydration tank, the screws also require anti-corrosion means, and there has been a demand for improvement 2 in terms of cost.

An object of the present invention is to provide a means for engaging a dehydration tank and a balance ring with a minimum number of screws by analyzing the inertial force generated between the dehydration tank and the balance ring.

1 The present invention uses a pin inserted from at least one of the dehydration tank and the balance ring into a hole in the other to reduce the component in a plane perpendicular to the rotational axis direction of the dehydration tank, out of the inertial force generated in the balance ring and the dehydration tank. The component in the direction of the rotational axis is configured to be received with a minimum number of screws, and the maximum effective diameter is obtained relative to the outermost diameter of the dehydration tank since it is related to the overall size of the washing machine.

An embodiment of the present invention will be described based on the drawings.

In FIG. 1, a water receptacle suspended from an outer frame 10 by a vibration isolating support device 12 has a dehydration tank 16 disposed coaxially with the tank 14, and a motor 18 which is a power source for washing and dewatering at the bottom. There is a clutch 20 that switches power between washing and spin-drying, and a pulsator 22 that operates during washing. During washing and rinsing, the pulsator 22 rotates to wash the laundry 26, and during spin-drying, the spin tub 16 rotates at high speed to clean the laundry. It is configured to dehydrate 26% of water.

Here, the laundry items 26 are not uniformly distributed in the dehydration tank 16 during the dehydration rotation, but are usually distributed unevenly as shown in FIG. 1.

This cannot be avoided because the cycle of washing → rinsing → spin-drying is automatically controlled by the timer 28, so that the unevenness of the laundry 26 during washing and rinsing directly transfers to spin-drying.

Therefore, in order to correct the unbalance caused by the bias of the laundry 26 during spin-drying rotation, a balance ring 24 is attached to the upper part of the spin-drying tank 16. It is a structure that generates force and maintains balance against the imbalance described above.

Therefore, if the main parts according to the present invention are shown in FIG. 2, the dehydration tank 1
The arcuate portion 4 protrudes inward from the cylindrical side portion 39 of 6.
0 and a partial cylindrical part 42, and near the upper end, a stepped part 44 eliminates the arcuate part 40 to form an upper end cylindrical part 46, and a hole 50 for the balance ring 24 is formed on the upper surface of the stepped part 44.
The balance ring 24 is disposed on the upper surface of the stepped portion 44, the pin 48 is fitted into the hole 50, and the pin 48 is fixed with a screw 52.

In addition, the lower part of the dehydration tank 16 is connected to the dehydration rotating shaft 30 with a nut 34.
The dewatering tank 16 is fixed to the dewatering rotating shaft 30 via a reinforcing plate 36.

Here, the deviation of the laundry object 26 during spin-drying rotation generates a centrifugal force F, which applies a force to the cylindrical side part 39 that spreads outward.

For this purpose, the cylindrical side part is conventionally fixed with 6 to 8 screws, and if the number of screws is reduced, that is, the pitch between the screws is increased, the dewatering tank 16 is molded from plastic or the like. The cylindrical side portion 39 was partially deformed due to the centrifugal force F and could not be put to practical use.

In contrast, in this configuration, since the pin 48 is provided on the upper surface of the stepped part 44 of the cylindrical side part 39, the deformation due to the centrifugal force F of the dehydration tank 16 itself improves the monocoque strength of the arcuate part 40. This makes it difficult to cause extreme deformation, and since it is held in the balance ring 24 by the pin 48, the strength against the centrifugal force F is improved.

Therefore, the six to eight screws conventionally required can be reduced to the minimum number of five or less, and the connection between the dehydration tank 16 and the balance ring 24 can be simplified.

Furthermore, according to this configuration, when the outermost diameter of the dehydration tank 16 is kept constant, the difference in diameter that decreases due to the coupling between the dehydration tank 16 and the balance ring 24 is small, so the effective diameter inside the dehydration tank 16 is It also has the effect of making it bigger.

As described above, according to the present invention, it is possible to provide a configuration in which the effective diameter inside the dehydration tank can be increased and the number of screws for connecting the dehydration tank and the balance ring can be minimized.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of a washing machine according to the present invention, and FIG. 2 is a sectional view of essential parts. 16...Dehydration tank, 24...Balance ring, 39...Cylindrical part side part, 40...
Arc-shaped part, 44... Stepped part, 46... Upper end cylindrical part, 48... Pin, 50... Hole,
52...screw.

Claims (1)

[Claims] 1 In a dehydration tank of a dehydrator or a dehydration tank of a washing machine in which washing and dehydration are performed in a single dehydration tank, the shape of the cylindrical side portion 39 of the dehydration tank 16 is modified by an arcuate portion 40 and a partial cylindrical portion 42 that protrude inward. In the vicinity of the upper end of the cylindrical side portion 39, the projection of the arcuate portion inward is eliminated to form a stepped portion 44, and the balance ring 24 is disposed on the stepped portion 44. , a pin 4 is attached to either the stepped portion 44 or the portion of the balance ring 24 that comes into contact with the stepped portion 44.
8 and a hole 50 in which the pin 48 engages is provided on the other side.