JPH03109097A - Decelerator of washing machine - Google Patents

Abstract

PURPOSE:To decrease noises of a washing machine by providing a cup to cover a toothed gear mechanism inside a case. CONSTITUTION:A cup 24 of iron, ABS resin or the like is provided for covering a toothed gear mechanism 15 inside a case 9. In this case, the cup 24 is gripped between an upper case 11 and a lower case 10, with an engaging hole 24a in the upper surface engaged with the lower outer peripheral part of a cylinder 11a of the upper case 11, and a lower end contacted with the inner bottom of the lower case 10. In this case, a certain space 25 is formed between the outer peripheral surface of the cup 24 and the inner peripheral surface of the case 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a speed reduction device for a washing machine or the like, in which rotation of an input shaft is slowed down by a gear mechanism and transmitted to an output shaft.

(Prior Art) Some washing machines have a structure in which a deceleration device is provided at the outer bottom of a tub in order to reduce the rotation speed of a motor and transmit it to an agitator in the tub. The speed reducer has an input shaft rotated by a motor inserted into one side of a case installed at the outer bottom of the tank, and an output shaft for driving the agitator inserted into the other side to control the rotation of the input shaft. , the speed is reduced by a gear mechanism provided in the case and transmitted to the output shaft.

(Problem to be solved by the invention) However, in the conventional configuration described above, when the stirring body is driven (
The sound generated by the gear mechanism during washing (during washing) leaks outside the case, and this is one of the causes of noise during washing.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a speed reduction device for a washing machine or the like that can reduce noise by suppressing noise generated from a gear mechanism from leaking out of a case.

[Structure of the Invention (Means for Solving the Problems) In order to achieve the above object, the present invention has an input shaft rotated by a motor inserted into one side of the case, and an output shaft inserted into the other side. In a speed reduction device for a washing machine or the like, the gear mechanism is arranged inside the case and the gear mechanism is covered inside the case. It is unique in that it has a cup.

(Function) According to the above-described means, since the gear mechanism is covered twice by the cup and the case, it is possible to suppress as much as possible the sound generated from the gear mechanism from leaking outside the case.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

First, in FIGS. 1 and 2, 1 is an outer box of a two-tub washing machine, 2 is a base plate, and 3 is a tub disposed inside the outer box 1. This tub 3 is a washing tub 4 and It has a dehydration tank (not shown). 5 is a container-shaped agitator disposed at the bottom of the washing tub 4; 6 is a motor disposed on the base plate 2; the rotational power of the motor 6 is transferred to a belt transmission mechanism 7 and a speed reducer 8; The deceleration is transmitted to the agitating body 5 via the agitator 5.

The speed reduction device 8 is constructed as shown in FIG. 1 in detail. 9 is a lower case 10 and an upper case 11
This case is screwed to the outer bottom of the washing tub 4. 12 is a lower case 10 which is one side of the case 9;
The input shaft is inserted into and supported by the cylindrical portion 10a, a pulley 13 constituting a part of the belt transmission mechanism 7 is attached to the lower end, and the upper end protrudes into the case 9. Reference numeral 14 denotes an output shaft that is inserted through and supported by the cylindrical portion 11a of the upper case 11, which is the other side of the case 9. The agitator 5 is attached to the upper end in the washing tub 4, and the lower end is connected to the input shaft 12. They protrude into the case 9 so as to face each other. Reference numeral 15 denotes a gear mechanism disposed within the case 9, which includes an annular internal gear 16 supported on the inner bottom surface of the lower case 10, and a serration joint mechanism 17 fitted and connected to the upper end of the input shaft 12. The sun gear 18 is disposed at the center of the internal gear 16, and a plurality of planetary gears 19 are disposed so as to mesh with both the internal gear 16 and the sun gear 18.

Each planetary gear 19 is rotatably supported by a holder 22 supported between upper and lower brackets 20, 21, and
Of the upper and lower brackets 20 and 21, the upper bracket 20 is fitted and connected to the lower end of the output shaft 14 by a serration joint mechanism 23.

On the other hand, 24 is a cup made of iron or ABS resin, for example, and a fitting hole 24a formed on the upper surface is fitted into the lower outer peripheral part of the cylindrical part 11a in the upper case 11, and the lower end is fitted into the inner bottom surface of the lower case 10. The gear mechanism 15 is provided in the case 9 so as to be covered by the upper case 11 and the lower case 10 in a state where the upper case 11 and the lower case 10 are in contact with each other.

A predetermined gap 25 is formed between the outer peripheral surface of the cup 24 and the inner peripheral surface of the case 9.

In the above configuration, when the motor 6 rotates, the rotation is transmitted to the input shaft 12 of the reduction gear device 8 via the belt transmission mechanism 7.
The sun gear 18 rotates. Then, each planetary gear 19 makes a planetary motion around the sun gear 19 while rotating, and the upper and lower brackets 20 and 2 rotate integrally with this planetary motion. The rotation of the upper bracket 20 causes the output shaft 14 to rotate, causing the agitator 5 to rotate at a low speed.

When the agitator 5 is driven (during washing), noise is generated from the gear mechanism 15, but in the above configuration, the gear mechanism 15 is covered twice by the cup 24 and the case 9. , it is possible to suppress as much as possible the sound generated from the gear mechanism 15 from leaking outside the case 9,
Noise can be reduced. Incidentally, according to the present embodiment in which the cup 24 is provided, the sound leaking from the case 9 can be reduced by 2 [dB] compared to the conventional configuration in which the power valve is not provided.

Note that by separately providing a sound absorbing material between the cup 24 and the case 9, for example, the noise can be further reduced.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, since the gear mechanism is double covered by the cup and the case, the sound generated from the gear mechanism is prevented from leaking outside the case. This has the excellent effect of reducing noise as much as possible.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is an enlarged vertical cross-sectional view of a main part, FIG. 2 is a perspective view of a washing machine, and FIG. 3 is a partial vertical cross-sectional side view of the washing machine. In the drawing, 6 is a motor, 8 is a reduction gear, 9 is a case, 12
14 is an input shaft, 14 is an output shaft, 15 is a gear mechanism, and 24 is a cup.

Claims (1)

[Claims] 1. An input shaft rotated by a motor is inserted into one side of the case, and an output shaft is inserted into the other side, and the rotation of the input shaft is decelerated by a gear mechanism provided inside the case to generate the output. What is claimed is: 1. A speed reduction device for a washing machine, etc., which transmits power to a shaft, characterized in that a cup is provided inside the case to cover the gear mechanism.