JPH0112518B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a single-tank dehydrating washing machine in which a motor is directly connected to an agitating blade through a washing shaft, and the transmission of vibration to the motor cooling fan is reduced to reduce noise. The purpose is to

Conventionally, pulsator type and agitation type are commonly seen as single-tank dehydrating washing machines. The disadvantage of the pulsator type is that it tends to damage the fabric and cause uneven washing, while the disadvantage of the stirring type is that it requires a reduction mechanism using gears to perform the stirring motion for cleaning and a link mechanism to reverse the stirring blades. In other words, the cost will be high.

In order to solve the above problems, a motor with drooping characteristics is directly connected to the washing shaft via a reduction gear, and the motor is electrically rotated in forward and reverse directions to produce stirring motion. machine was proposed. However, this washing machine has a motor rotation speed of approximately 1.
The acceleration of the motor is large because it changes from 0 to 900 r/p/m per second, and the motor also generates vibrations with a wide range of frequencies.This vibration is transmitted to cooling fans etc. that are closely attached to the motor shaft. The problem was that it generated a lot of noise.

The present invention has been made to solve the above-mentioned conventional problems, and one embodiment thereof will be described below based on the drawings. In the figure, 1 is the outer frame, 2 is the water tank, and 3 is the washing and dewatering structure (hereinafter referred to as the inner tank).
The bottom of this inner tank 3 is fixed to one end of a dewatering shaft 4. Reference numeral 5 denotes a stirring blade for stirring the clothes in the inner tub 3, and this stirring blade 5 is fixed to one end of the washing shaft 6 by an appropriate method. The washing shaft 6 and the dewatering shaft 4 are arranged coaxially.

Reference numeral 7 denotes a motor shaft, and the motor shaft 7 and the other end of the washing shaft 6 are connected by a coupling 9. 8
are bearings for pivotally supporting the washing shaft 6 and the dewatering shaft 4; a planetary gear train for reducing the motor speed;
It is also a gearbox with a built-in clutch that switches between washing and dewatering.

10 is a motor, 11 is a rotor fixed to the motor shaft 7, and 12 is a stator that constitutes the motor 10 together with the rotor 11. 13 is a fixture for fixing the motor 10 to the water receiving tank 2, and 14 is a vibration isolating mechanism, one end of which is connected to the upper part of the outer frame 1, and the other end of which suspends and holds the water receiving structure 2.

15 is a fan for cooling the motor 10, and is fixed to the motor shaft 7. For more information,
As shown in FIG. 2, a flanged elastic body 16 made of rubber or the like and an elastic washer 17 made of rubber or the like.
The flat plate portion 18 of the fan 15 is clamped between the fan 15 and fastened to one end of the coupling 9 by a stepped bolt 19 passing through the flanged elastic body 16 and the elastic washer 17. 20 is a metal washer.

In the above configuration, the motor cooling fan 15 needs to be lightweight in order to reduce the load on the motor, and is generally formed of a thin flat plate (for example, a steel plate or a resin material). Therefore, there are many resonance points within the audible range, and in machines where the rotation speed changes greatly, such as an agitating washing machine that is directly connected to a motor, the resonance point can be reached by slightly changing the shape, material, strength, etc. of the fan. Even if it is shifted, vibration cannot be prevented.

However, according to the present invention, since the motor cooling fan is elastically attached to the motor,
The transmission of vibration to the motor cooling fan can be reduced, suppressing the vibration and reducing noise. The present invention is particularly effective in agitator-type washing machines that require a motor whose rotational speed varies widely, and by using a thin fan, it is possible to reduce the load on the motor and reduce noise.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a one-tub type dehydrating washing machine according to an embodiment of the present invention, and FIG. 2 is a partially cutaway side view of the main parts thereof. 2...Water tank, 3...Washing/dehydration tank, 6...Washing shaft,
10...Motor, 15...Motor cooling fan, 16
...Elastic body with flange, 17...Elastic washer.

Claims (1)

[Claims] 1 A washing and dehydrating tank equipped with an agitating blade inside through a washing shaft, and a water receiving tank in which this washing and dehydrating tank is installed, and a rotational acceleration coaxially connected to the washing shaft through a gear reducer. A one-tank dehydrating washing machine in which a large motor is disposed at the bottom of the water receiving tank, and a motor cooling fan made of a thin flat plate is elastically attached to the shaft of the motor via an elastic body such as rubber.