KR20000000587A - Reducing device of washer - Google Patents

Abstract

PURPOSE: A reducing device of a washer is provided to minimize the washing noise by preventing the flow of the planetary gear unit. CONSTITUTION: The reducing device of a washer comprises: a brake drum(30) installed inside of upper and lower housings(10)(11); a lower bearing case(31) having a hollow unit combined into the lower area of the brake drum(30); a planetary gear unit(32) installed inside of the brake drum(30); an output shaft(14) for revolving a pulsator(6); and an input shaft(18) for delivering the driving force to the output shaft(14) by penetrating into the midair unit of the lower bearing case(31).

Description

Reduction Gear of Washing Machine

The present invention relates to a deceleration device for a washing machine, and more particularly, to a deceleration device for a washing machine to reduce the noise of the laundry by preventing the flow of the planetary gear unit for reducing the driving force transmitted from the drive motor.

In general, a washing machine is a device for washing laundry by removing foreign substances or contaminants adsorbed on laundry by emulsification of detergent and friction and impact of water flow due to rotation of pulsator. The washing machine detects the amount and type of laundry by a sensor. The washing, rinsing, and dehydration are automatically set, and the washing water is supplied to an appropriate level according to the amount and type of laundry, and then washing is automatically performed under the control of the microcomputer.

In this automatic washing machine, as shown in FIG. 1, the top cover 2 is coupled to the upper side of the main body 1 so as to be openable and closed, and a washing tank for storing the washing water supplied through the water supply valve 3 inside the main body 1. 4) is mounted, the dehydration tank (5) formed in the outer circumferential surface of the plurality of dehydration holes (5a) is coupled to the washing tank (4).

The dewatering tank 5 is coupled to a pulsator 6 which creates water flow in the washing water while being rotated forward and backward with a predetermined height relative to the bottom surface, and a driving motor 7 for providing driving force to the bottom of the washing tank 4. ) Is installed.

One side of the drive motor 7 is equipped with a power transmission means 8 for selectively transmitting the driving force of the drive motor 7 transmitted through the belt (7a) to the dehydration tank (5) or pulsator (6), One side of the power transmission means is provided with a drain valve (9) for discharging the wash water during the rinsing and dehydration of the laundry.

Therefore, when washing conditions, such as hot or cold water, washing, rinsing and dehydration time, are selected in a state in which laundry is stored in the dehydration tank 5, the washing water is supplied to the washing tank 4 through the water supply valve 3. At the same time, the driving force of the driving motor 7 is transmitted to the power transmission means 8 through the belt 7a, and then is decelerated. The water flow is applied to the washing water while the pulsator 6 is rotated forward and reverse. Will be done.

When the washing is completed, the drain valve 9 is opened to drain the wash water, and water is supplied again through the water supply valve 3, and when several rinses are performed, the dehydration tank is operated by the power transmission means 8. Washing is completed when the wash water absorbed by the laundry through the dehydration hole (5a) by the centrifugal force generated by the rotation of the high speed (5) is released and discharged to the outside through the drain valve (9).

Meanwhile, the power transmission device 8 for selectively rotating the dewatering tank 5 or the pulsator 6 has upper and lower housings 10 fixed to face the bottom of the washing tank 4 as shown in FIG. 2. 11), the deceleration means penetrated and supported in the center thereof, and the brake lever 12 for controlling the rotation of the deceleration means according to washing and / or dehydration stroke.

The reduction means is an upper bearing case 13 fixed to an upper surface of the upper housing 10 and a planetary gear unit 15 to which an output shaft 14 and an output shaft 14 for rotating the pulsator 6 are coupled. In addition, the lower bearing case is installed outside the planetary gear unit 15 and includes a brake drum 16 for blocking driving force transmitted to the output shaft 14 when washing laundry, and coupled to the lower housing 12. 17) and an input shaft 18 having a pulley 7b fixed to one end thereof so as to transmit the driving force of the driving motor 7 to the output shaft 14 therethrough.

The upper and lower bearing cases 13 and 17 are interposed between the bearing 19 and the anti-rotation bearing 20 in order to smoothly rotate the dewatering tank 5 when the laundry is dewatered and to prevent reverse rotation. . Here, the planetary gear unit 15 is protected by the flange 21 to fit with the inner ring gear 21a machined on its inner circumferential surface, and the upper and lower carriers 22 on the upper and lower surfaces of the planetary gear unit 15. (23) are respectively fixed.

As shown in FIG. 3, the flange has a plurality of recesses 21b formed on the bottom thereof, and a convex portion fitted to the recess 21b on the upper surface of the lower bearing case 17 through which the input shaft 18 is rotatably passed. 17a is formed. The convex portion 17a is processed into an embossing shape so as to correspond to the concave portion 21b.

Therefore, during washing, the driving force of the driving motor 7 is transmitted to the input shaft 18 through the belt 7a, and at the same time, the lower carrier 23 to which one end of the input shaft 18 is coupled is rotated. Then, the planetary gear unit 15 to which the lower carrier 23 is fixed is engaged with the inner ring gear 21a of the flange 21 to reduce the rotational speed to the output shaft 14 coupled to the upper carrier 22. As it is transmitted, the pulsator 6 is rotated forward and reverse. As a result, the water flow acts on the washing water by the operation of the pulsator 6, thereby washing.

On the other hand, during dehydration, as the drain valve 9 and the brake lever 12 operate, the driving force transmitted to the pulley 7b is transmitted to the lower bearing case 17, and the transferred driving force is again transferred to the brake drum 16. After being delivered to the dehydration tank 5 through the output shaft 14, the washing water absorbed in the laundry by the centrifugal force generated by the high speed rotation in one direction is dewatered. At this time, the dewatering tank 5 is prevented from reverse rotation by the reverse direction preventive bearing 23 interposed in the lower bearing case (17).

However, since the planetary gear unit is fixed by processing the recesses and the convex portions fitted to the flange and the lower bearing case as described above, the planetary gear unit is fixed according to the processing accuracy and the dimensional error of the recesses and the convex portions fitted thereto. Difficult to work, of course, when the planetary gear unit flows to the lower bearing case during washing or dehydration, washing noise is severely generated according to the problem, in particular, the convex portion is easily broken, there is a problem that the reliability of the product is lowered.

The present invention is to solve the above problems, an object of the present invention is to reduce the flow of the planetary gear unit with respect to the lower bearing case to a minimum, thereby preventing the laundry noise during washing and dehydration stroke, planetary gear unit It is to provide a reduction device of the washing machine that can prevent the damage of the fixing protrusion for fixing the flange to the lower bearing case is reinforced by the strength of the flange when the rotation of the.

1 is a longitudinal sectional view showing a general automatic washing machine;

2 is a cross-sectional view showing a reduction device applied to the fully automatic washing machine of FIG.

3 is an exploded perspective view illustrating a conventional planetary gear unit, a flange, and a lower bearing case in the reduction device of FIG. 2;

4 is an exploded perspective view illustrating a speed reduction device of the washing machine according to the present invention;

5 is an assembled cross-sectional view of the reduction device shown in FIG. 4.

Explanation of symbols on the main parts of the drawings

10,11: upper and lower housing 12: brake lever

14: output shaft 18: input shaft

30: brake drum 30a: reinforcement projection

31: lower bearing case 31a: fixing protrusion

32: planetary gear units 33, 34: upper and lower carriers

35: flange 35a: inner ring gear

36: extension portion 36a ': locking groove

36a: fixing groove

Features of the present invention for achieving the above object, the brake drum is installed in the upper and lower housings and the lower bearing case coupled to the lower side of the brake drum and the planetary gear unit mounted inside the brake drum and the A speed reducer of a washing machine having an output shaft coupled to a planetary gear unit for rotating a pulsator and an input shaft penetrating the lower bearing case to transmit a driving force to the output shaft, wherein the planetary gear unit has a tooth against the planetary gear unit. A flange mounted while being fitted; An extension part extending inward in the outer peripheral surface of the lower side of the flange; A unit fixing part provided in the extension part and the lower bearing case to fix a flange including the planetary gear unit; It is achieved by providing a strength reinforcing part provided at a corresponding position with respect to the unit fixing part to prevent the flow of the flange when washing or dehydrating laundry, and to reinforce the strength.

The unit fixing part according to the present invention is achieved by a plurality of fixing protrusions projecting on the upper surface of the lower bearing case and fixing grooves formed in the lower side extension portion of the flange to fit the fixing protrusions.

Strength reinforcing portion according to the present invention is achieved by a plurality of engaging grooves formed in the upper side extension portion of the flange and a reinforcing projection protruding on the inner circumferential surface of the brake drum so as to fit into each of the engaging grooves.

Hereinafter, a preferred embodiment of the speed reduction apparatus of the washing machine according to the present invention will be described in detail with reference to the accompanying drawings.

4 and 5 is a view showing a speed reduction device according to the present invention, in the present invention, the same reference numerals for the convenience of the description of the same parts of the conventional speed reduction means.

The power transmission device 8 installed at the bottom of the washing tub 4 and transmitting the driving force of the driving motor 7 is upper and lower and upper and lower housings 10 and 11 fixed by fixing members to face each other. It consists of a deceleration means penetrating the center of the housing 10, 11, and a brake lever 12 for controlling the rotation of the deceleration means.

The reduction means includes a brake drum 30 installed inside the upper and lower housings 10 and 11 and a lower bearing case 31 and a brake drum 30 having a hollow portion coupled to a lower side of the brake drum 30. Into the planetary gear unit 32 mounted therein, and the output shaft 14 for rotating the pulsator 6 and the input shaft 18 passing through the hollow portion of the lower bearing case 31 to transmit the driving force to the output shaft 14. It is composed.

A pulley 7b for transmitting a driving force of the driving motor 7 is fixed to one end of the input shaft 18, and upper and lower carriers 33 and 34 are fixed to the upper and lower surfaces of the planetary gear unit 32, respectively. The outer side of the planetary gear unit 32 is equipped with a flange 35 so as to fit with the inner ring gear 35a machined on its inner circumferential surface.

The planetary gear unit 32 is fixed to the brake drum 30, the lower bearing case 31, and the flange 35, and at the same time, the flange 35 generated by rotation of the planetary gear unit 32 when washing or dehydrating laundry is fixed. The unit fixing part and the strength reinforcing part are respectively provided in order to prevent the flow of c) and to reinforce the strength thereof, and the extension part 36 extends inward in the lower outer peripheral surface of the flange 35.

The unit fixing portion is formed in the fixing protrusion 31a protruding from the upper surface of the lower bearing case 31 and the extension portion 36 of the flange 35 to form a circular fixing groove 36a into which the fixing protrusion 31a is fitted. The strength reinforcing part has a rectangular engaging groove (36a) formed on the outer peripheral surface of the upper side of the flange 35 so that the reinforcing protrusions (30a) and the reinforcing protrusions (30a) to be spaced apart at regular intervals on the inner peripheral surface of the brake drum (30). '). The reinforcement protrusion 30a is for preventing damage to the fixing protrusion 31a fitted into the fixing groove 36a when the planetary gear unit 32 rotates.

Here, the extension part 36 extending to the flange 35 is for easily forming the fixing groove 36a, and each of the protrusions and the grooves may be formed or protruded oppositely depending on the assembly of the planetary gear unit.

Referring to the operation of the washing machine according to the present invention configured as described above in detail as follows.

The flange 35 including the planetary gear unit 32 is fixed to the lower bearing case 31. That is, when the fixing protrusion 31a is inserted into the fixing groove 36a formed in the extension part 36 of the flange 35, then the brake drum 30 and the lower bearing case 31 are assembled, the outer circumferential surface of the flange 35 is provided. As the reinforcing protrusions 30a of the brake drum 30 are fitted into the engaging grooves 36a 'formed in the grooves 36a', the flanges 35 can be secured from above and below.

When washing the laundry in the state in which the planetary gear unit 32 is fixed as described above, the driving force provided from the driving motor 7 is transmitted to the input shaft 18 having one end coupled to the lower carrier 34 through the belt 7a. Then, the driving force transmitted to the input shaft 18 is decelerated by the planetary gear unit 32 engaged with the inner ring gear 35a of the flange 35 and then transmitted to the output shaft 14 to fix the pulsator 6. , Proceed with the laundry administration while reversing.

In addition, when the drain valve 9 and the brake lever 12 are operated at the time of dehydration, the driving force transmitted to the pulley 7b is transmitted to the lower bearing case 31, and the driving force is again passed through the flange 35 via the brake drum. After being delivered to the 30, it is delivered to the dehydration tank 5 through the output shaft 14, so that the wash water absorbed in the laundry by the dehydration tank 5, which is rotated at high speed, is dehydrated.

Therefore, the lower part which fits into the flow and vibration noise of the flange 35 which generate | occur | produces when the planetary gear unit 32 rotates by the driving force transmitted from the input shaft 18 at the time of washing or dehydration of laundry, and fits into the fixing groove 36a. Damage of the fixing protrusion 31a protruding from the bearing case 31 can be prevented by a plurality of reinforcing protrusions 30a fitted into the locking grooves 36a '.

As described above, according to the deceleration device of the washing machine according to the present invention, the flow of the planetary gear unit with respect to the lower bearing case can be reduced to a minimum, thereby preventing laundry noise during washing and dewatering operation, and during rotation of the planetary gear unit. The strength of the flange is reinforced to prevent damage of the fixing protrusion for securing the flange to the lower bearing case.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (2)

In the reduction device of the washing machine, A flange mounted to fit against the planetary gear unit; An extension part extending and formed inward from a lower outer peripheral surface of the flange; A unit fixing part provided in the extension part and the lower bearing case to fix a flange including the planetary gear unit; It is provided in a corresponding position of the unit fixing portion includes a strength reinforcing portion for reinforcing the strength while preventing the flow of the flange during washing or dehydration of the laundry, And the unit fixing part includes a plurality of fixing protrusions protruding from the upper surface of the lower bearing case, and fixing grooves formed in the lower extension portion of the flange so that the fixing protrusions are fitted therein. The reduction apparatus of claim 1, wherein the strength reinforcing part comprises a plurality of engaging grooves formed on the upper outer peripheral surface of the flange and reinforcing protrusions protruding from the inner peripheral surface of the brake drum to be fitted into the engaging grooves, respectively. .