KR20040013992A - structure of cushion ring for reducing noise in cluth for full automation type washing machine - Google Patents

Abstract

PURPOSE: Cushion ring structure for reducing noise of a clutch for a fully automatic washing machine is provided to minimize noise in moving down a coupling while switching power into the dehydration mode by forming the triangular section in a protruded rib with modifying the structure of the cushion ring. CONSTITUTION: An elastic rib(180) is formed in the lower part of an inner edge of a cushion ring(18), and the bore of the elastic rib is a little smaller than the outer diameter of an inner connector. An annular recessed groove(181) is formed outside the elastic rib in the lower part of the cushion ring for radial deformation to the elastic rib, and recesses(182a,182b) are formed in the contact portion of the lower part of a coupling in the upper part of the cushion ring to prevent the cushion ring from contacting to the lower part of the coupling and lifting together and to apply the cushion. Annular protruded ribs(183a,183b,183c) are formed in the upper part of the cushion ring, and spaced from one another. The triangular section is formed in the protruded rib, and the upper part of the protruded rib is rounded.

Description

Noise reduction cushioning structure of clutch for automatic washing machine {structure of cushion ring for reducing noise in cluth for full automation type washing machine}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic washing machine, and more particularly, to a fully automatic washing machine having a novel power transmission mechanism for performing washing and rinsing by a pulsator rotating at a low speed, and performing dehydration by a dehydration tank rotating at a high speed.

In general, a washing machine is a product that removes various contaminants attached to clothes, bedding, etc. by using the emulsification of the detergent and the friction action of the water flow due to the rotation of the washing blade, and the impact of the pulsator on the laundry. By detecting the amount and type of laundry, the washing method is automatically set, and the water level of the washing water is supplied to the appropriate level according to the amount and type of the laundry, and then washing is performed under the control of the microcomputer.

In addition, the driving method of the conventional fully automatic washing machine is a method of rotating the pulsator or the dehydration tank by transmitting the rotational power of the drive motor to the washing shaft through the power transmission belt and pulley, or to the dehydration shaft, and BLDC motor ( There is a method of rotating the washing tank and dehydration tank at different speeds when washing and dehydrating by speed control of Brushless DC Motor.

On the other hand, in recent years, while using a BLDC motor, the power transmission path is controlled differently, and when washing, the pulsator is rotated at low speed to wash, and when dewatering, a pulsator and a dewatering tank are rotated at the same time to dewater.

Figure 1 is a longitudinal sectional view showing a schematic configuration of a fully automatic washing machine according to the present invention, Figures 2a and 2b is a sectional view showing the action of the clutch mechanism applied to Figure 1, Figure 3 is an enlarged view of the main portion of Figure 2b, these figures With reference to the configuration and operation of the automatic washing machine according to the present invention will be described.

First, referring to Figure 1, the automatic washing machine according to the present invention is installed in the dehydration tank (2) and the dehydration tank (2) which is rotatably installed inside the outer tank (1) of the main body, the dehydration tank A pulsator 3 rotatably installed independently of the (2), a dehydration shaft 5 which is rotatably supported by the bearing case 20 (see FIG. 2A) and transmits rotational power to the dehydration tank 2; , The washing shaft 4 which transmits rotational power to the pulsator 3, the BLDC motor 7 in which the rotor 7b rotates as it is energized by the stator 7a, and the BLDC in response to the washing stroke or the dehydration stroke. And a clutch mechanism capable of switching the power transmission path of the motor 7 to the washing shaft 4 or the dewatering shaft 5.

2A and 2B and 3, the clutch mechanism includes a clutch motor 6 installed below the outer tub 1, a cam 600 coupled to a drive shaft of the clutch motor 6. A groove 800 having an inclined surface 801 linearly moving under the guidance of the lever guide 30 fixed to the bearing case 20 and the lever guide 30 when the clutch motor 6 is driven; A lever 8 having a flat surface 802 extending horizontally from the lower end of the inclined surface 801 and installed between the cam 600 and the lever 8 of the clutch motor 6 when the clutch motor 6 is turned on. A connecting rod 17 acting to pull the lever 8 toward the clutch motor 6, and one end is fixed to the front end of the lever guide 30, and the other end of the locking protrusion 803 on one side of the lever 8 is fixed. It is fixed to the return spring 14, which is fixed to impart a return force to the lever 8, and the groove 800 having the inclined surface 801 of the lever 8 at the time of dehydration. It is possible to move up and down along the hollow cylinder-type movable member 9 and the guide groove 900 inside the movable member 9 which are lowered by the inclined surface 801 and are positioned below the flat surface 802 when the draw is switched. The plunger 10 is installed to be installed, the shock absorbing spring 11 positioned between the mover 9 and the plunger 10, and the gear fixed to the lower portion of the bearing case 20 and formed along the circumferential direction (221) ) Is coupled to the coupling stopper 22 and the lower end of the plunger 10, one end is hinged, and the middle one point hinged to the lower end of the support bracket 220 formed on the coupling stopper 22, the plunger A fork-shaped movable rod 12 for seesawing about one point of the hinge-joined intermediate portion during the ascending and descending movement of the movable rod 12 along the dehydration shaft 5 direction. Coupling to switch rotational power transmission path of BLDC motor (7) while lifting And a connector assembly 16 interposed so that the rotational force of the rotor 7b is transmitted to the washing shaft 4.

At this time, the clutch motor 6 is a geared motor that transmits power to a drive shaft connected to the cam 600 by decelerating through a reduction gear provided therein.

The connector assembly 16 is integrally injection molded into the outer connector 16a, which is a resin material that is bolted to the rotor 7b, and formed on the inner circumferential surface of the outer connector 16a. A metal inner connector 16b having a serration 160b engaged with the formation and having a serration 161b formed thereon for coupling with the coupling 15 on an outer circumferential surface of the upper end exposed to the outside of the outer connector 16a. It is composed of

At this time, the inner connector 16b is preferably made of an aluminum alloy sintered body to improve strength.

An annular groove 162a is provided at the center of the upper surface of the outer connector 16a, and the cushion ring 18, which is an elastic member, is seated in the groove 162a.

Figure 4 is a perspective view showing the shape of the cushion ring, Figure 5 is a cross-sectional view of Figure 4, the cushion ring 18 is an elastic rib having an inner diameter below the inner edge of the inner connector 16b slightly smaller than the outer diameter of the inner connector (16b) 180 is formed, and the outer surface of the elastic rib 180 of the lower surface is formed with an annular groove 181 for giving a deformation margin in the radial direction with respect to the elastic rib 180, the upper surface In the radial direction, the annular protrusion ribs 183a and 183b are spaced apart from each other, and the cushioning ring 18 is closely attached between the spaced apart protrusion ribs 183a and 183b to prevent the phenomenon of coming up. Grooves 182 are formed to impart.

Meanwhile, referring to FIGS. 2A, 2B, and 3, the dehydration shaft 5 is coupled to the upper shaft portion by being pressed into the upper end of the lower shaft portion having a larger inner diameter, unlike the existing dehydration shaft. The upper axial support bearing 23 supporting the contraction 5 is supported.

In addition, the upper end of the movable member 9 is formed to be inclined to correspond to the inclined surface 801 of the lever 8, so that the movable member 9 moves up and down in the vertical direction when the lever 8 is moved horizontally. .

In addition, the connecting rod 17 is one end is coupled to the cam 600, the other end is hinged to the lever 8, the lower end of the one end of the lever 8 to which the connecting rod is coupled of the return spring 14 When the restoring force is applied, a stopper 805 is formed which defines the insertion position of the lever 8 into the lever guide 30.

In addition, a compression spring 40 is provided between the upper surface of the coupling 15 and the lower shaft support bearing 24 to push the coupling 15 downward when switching to the dehydration mode.

In addition, between one side of the outer surface of the coupling stopper 22 and the movable rod 12, the movable rod 12 is provided to rotate in a clockwise direction about the fixing pin 12b when switching to the dehydration mode. The tension spring 13 is connected.

In addition, the front end portion of the movable rod 12 that is in contact with the lower surface of the flange portion of the coupling 15 is treated in a rounded form to reduce the frictional force.

On the other hand, the coupling 15 is provided with a flange portion 152 extending radially in the upper end of the cylindrical body, and the gear 221 of the coupling stopper 22 is joined to the upper edge of the flange portion 152 Possible gears 151 are formed along the circumferential direction, and on the inner circumferential surface to engage the serration of the dehydration shaft 5 and the serration 161b on the outer circumferential surface of the upper end of the inner connector 16b constituting the connector assembly 16. Serrations 150a and 150b are provided.

At this time, the pitch of the serrations 150a and 150b formed on the inner circumferential surface of the coupling 15 is the inner connector when the coupling 15 is completely lowered and engaged with the inner connector 16b. The upper side serration 150a and the lower side serration 150b are formed to have different modules based on the upper position of 16b).

That is, the pitch of the serration formed on the inner circumferential surface of the coupling 15 is formed such that the lower serration 150b has a larger module based on the upper position of the inner connector 16b when it is engaged. .

In particular, the lower end of the rounded lower side serration 150b is formed to form an involute profile surface to facilitate clutching with the serration 161b of the inner connector 16b.

In addition, the point where each valley of the lower serration 150a and the lower serration 150b formed on the inner circumference of the body of the coupling 15 meets a sudden cross-sectional change to increase the force to withstand torsional stress. So that the round is processed.

The action of the clutch mechanism of the automatic washing machine configured as described above is as follows.

First, before the washing is started, the coupling 15 is maintained in the off state as shown in FIGS. 2B and 3 as the off state in which power is not applied to the clutch motor 6.

That is, at this time, the mover 9 is located in the groove 800 having the inclined surface 801 of the lever 8, and the coupling 15 is located at the bottom dead center.

In this state, when power is applied to the clutch motor 6 and the clutch motor 6 is turned on, the driving force of the clutch motor 6 is transmitted to the cam 600 through a drive shaft, and the cam 600 The connecting rod 17 is moved toward the clutch motor 6 by the rotational movement of), and thus the lever 8 is pulled toward the clutch motor 6 while being guided by the lever guide 30.

At this time, the return spring 14 installed at the rear end of the lever guide 30 is tensioned.

On the other hand, when the cam 600 rotates, the mover 9 which contacts the inclined surface 801 of the lever 8 is pushed down by the inclined surface 801, and the cam 600 as shown in FIG. 2A. Is located at the holding point, the mover 9 is positioned below the flat surface 802 of the lever 8.

In this way, when the movable member 9 is lowered due to the rotation of the cam 600 to the holding point and the movement of the lever 8 toward the clutch motor, the movable member 9 compresses the shock absorbing spring 11. Accordingly, the plunger 10 installed to move up and down along the guide groove 900 of the mover 9 is also lowered.

Subsequently, the movable rod 12 hinged to the plunger 10 passes through the support bracket 220 of the coupling stopper 22 fixed to the lower portion of the bearing case 20 as the plunger 10 descends. It rotates in a counterclockwise direction on the basis of the fixing pin (12b) of one point of the middle portion.

When the movable rod 12 rotates counterclockwise in the drawing about the fixing pin 12b, the tip of the movable rod 12 contacts the lower surface of the flange portion 152 of the coupling 15. Thus, the coupling 15 is pushed up along the dehydration shaft 5 in the axial direction.

Accordingly, upon completion of power switching to the washing mode, the gear 151 formed at the upper end of the coupling 15 is fixed to the coupling stopper fixed on the lower surface of the bearing case 20 as shown in FIG. 2A. The gear provided in 22 is matched to 221.

In addition, when the gear 151 of the coupling 15 is engaged with the gear 221 of the coupling stopper 22 in this manner, the coupling 15 is out of the connector assembly 16, so that Only the washing shaft 4 is rotated during rotation.

That is, during washing, the coupling 15 is engaged only with the serration of the outer circumferential surface of the dehydration shaft 5, and is not engaged with the serration 161b of the upper end of the inner connector 16b engaged with the washing shaft 4. Therefore, the rotational power of the rotor 7b is transmitted only to the pulsator 3 through the washing shaft 4.

In the state where the gear 151 of the coupling 15 is engaged with the gear 221 of the coupling stopper 22, the rotation of the coupling 15 is caused by the gear 221 of the coupling stopper 22. Is prevented.

As such, the clutch motor 6 is maintained in the off state when the washing mode is switched to the washing mode.

The following describes the operation process of the clutch mechanism at the time of dehydration.

When washing is performed in the state as shown in FIG. 2A, when washing is completed and power transmission path switching to the dehydration mode is required to proceed with dehydration, power is applied to the clutch motor 6 again to drive the clutch motor. Cam 600 is rotated.

As such, when the cam 600 of the clutch motor 6 rotates to move to the dewatering position, the lever 8 is moved away from the clutch motor 6 by the restoring force of the return spring 14.

Accordingly, in the washing mode, the movable member 9 in contact with the flat surface 802 of the lever 8 is inclined surface 801 of the lever 8 when the return of the lever 8 is completed as shown in FIG. 2B. The groove 800 is provided.

As such, when the movable member 9 rises due to the movement of the lever 8, the compressive force applied to the shock absorbing spring 11 is alleviated, and thus the movable member 9 can be elevated along the guide groove 900 of the movable member 9. The installed plunger 10 is also raised.

Subsequently, the movable rod 12 hinged thereto according to the rise of the plunger 10 passes through the support bracket 220 of the coupling stopper 22 fixed to the lower portion of the bearing case 20. It rotates clockwise on drawing about 12b.

Then, as the movable rod 12 rotates clockwise in the drawing about the fixing pin 12b, the tip of the movable rod 12 supports the coupling 15 along the dewatering shaft 5. The force pushing up in the axial direction is removed.

As the bearing force of the movable rod 12 with respect to the coupling 15 is removed in this way, the coupling 15 is lowered by the self-weight and the restoring force of the compression spring 40, and thus the coupling 15 The gear teeth 151 of the c) come out of the gear 221 of the coupling stopper 22.

When the coupling 15 is completely lowered, as shown in FIG. 2B, the serrations 150a and 150b of the inner circumferential surface of the coupling 15 are formed on the outer circumferential surface of the upper end of the inner connector 16b coupled to the washing shaft 4. The serration 161b and the lower end of the dehydration shaft 5 are respectively engaged with the serrations, and thus, the high speed rotation of the washing shaft 4 and the dewatering shaft 5 is performed during the high speed rotation of the rotor 7b, so that dehydration proceeds. .

At this time, the serration 150b of the portion of the serration 150a and 150b formed on the inner circumferential surface of the coupling 15 to be engaged with the inner connector 16b has a larger module and has a lower pitch. The lower end of the serration 150b positioned on the side is rounded, so that the inner connector 16b can be easily engaged and separated from the serration 161b.

However, such a conventional clutch mechanism has the following problems.

At the time of switching to the dehydration mode, the connecting rod 17 is returned to the right side in the drawing by the clutch motor 6 driving, and the coupling rod is coupled by the return force of the compression spring 40 as the movable rod 12 descends. As the ring 15 descends, the serration 150b on the lower side of the coupling 15 and the serration 161b of the inner connector 16b are engaged to rotate the dehydration shaft.

At this time, the noise preventing cushion ring 18 is installed in the groove 162a inside the outer connector 16a, and each protruding rib 183a and 183b formed to form a coupling support on the upper surface of the cushion ring 18. The upper surface of the structure to form a flat surface has the disadvantage of reducing the performance of reducing noise.

In particular, when the power is switched to the dewatering mode, the coupling 15 and the inner connector 16b are engaged with each other and then the coupling 15 and the inner connector 16b are displaced by the rotation of the rotor 7b during the dehydration operation. When the coupling 15 descends momentarily strongly by the return force of the compression spring 40 while being resolved, the upper surface of the protruding ribs 183a and 183b formed on the upper surface of the cushion ring 18 of the conventional structure is Since a flat surface is formed, the contact area with the bottom surface of the coupling 15 is wide, so that noise is also large.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. In the clutch mechanism of a full-automatic washing machine, when the rotational power is transmitted to a pulsator or a dehydration tank, the rotational power can be stably controlled in a short time. The purpose of the present invention is to effectively reduce the noise caused by the lowering of the coupling when the power is switched to the dehydration mode by improving the structure of the cushioning.

1 is a longitudinal sectional view showing a schematic configuration of a fully automatic washing machine according to the present invention;

2A and 2B are sectional views showing the action of the clutch mechanism applied to FIG.

2A is a state diagram at the time of washing

Figure 2b is a state diagram at the time of dehydration

3 is an enlarged view illustrating main parts of FIG. 2B;

4 is a perspective view of the cushioning of FIGS.

5 is a cross-sectional view of the cushioning of FIG.

6 is a cross-sectional view of the cushioning of the present invention

7 is a cross-sectional view of main parts of the clutch mechanism to which the cushioning of the present invention is applied;

Explanation of symbols on the main parts of the drawings

6: clutch motor 7: BLDC motor

7a: stator 7b: rotor

8: Lever 9: Operator

10: Plunger 11: Shock spring

12: movable rod 12b: retaining pin

13: Tensile spring 14: Return spring

15: Coupling 150a, 150b: Serration

151: Gear 152: Flange

16: Connector assembly 16a: Outer connector

16b: inner connector 160b: serration of the inner circumference of the inner connector

161b: Serration of the outer circumferential surface of the inner connector

17: Connecting rod 18: Cushion ring

180: elastic ribs 181: grooves 182a, 182b: grooves

183a, 183b, 183c: Extrusion rib 20: Bearing case

22: Coupling stopper 220: Support bracket

30: Lever Guide 40: Compression Spring

In order to achieve the above object, the present invention provides a dehydration tank rotatably installed in the outer tank, a pulsator installed in the dehydration tank and rotatable independently of the dewatering tank, and rotatably supported in the bearing case to provide rotational power to the dewatering tank. A dehydration shaft to be transmitted, a washing shaft to transmit rotational power to the pulsator, a BLDC motor in which the rotor rotates as the stator is energized, a clutch motor installed at the bottom of the outer tub, a cam coupled to the drive shaft of the clutch motor, and And a lever guide fixed to the bearing case, a lever linearly guided by the guide of the lever when the clutch motor is driven, a mover that moves up or down in conjunction with the linear movement of the lever, and the movable member moves up and down. Coupling for switching the rotational power transmission path of BLDC motor to laundry shaft or dehydration shaft while moving up and down along dehydration shaft An outer connector coupled to the outer connector to transmit the rotational force of the rotor to the laundry shaft, and a serration coupled to the inside of the outer connector and engaged with a serration at the bottom of the laundry shaft on an inner circumferential surface thereof and exposed to the outside of the outer connector; An inner washing machine including an inner connector on which a serration for coupling with a coupling is formed and a cushioning ring installed in an annular groove formed in an upper surface of the outer connector; An elastic rib having an inner diameter smaller than an outer diameter of an inner connector is formed under the inner edge of the cushioning ring, and a radially outer side of the elastic rib of the cushioning lower surface in a radial direction with respect to the elastic rib. An annular groove is formed to give a deformation margin, and a portion for contacting the lower surface of the upper surface of the cushioning ring with the coupling lower surface prevents the cushioning from sticking up to the lower surface of the coupling ring and gives a cushion. Is formed, the groove of the upper surface of the cushioning ring is formed by the annular protrusion ribs spaced apart along the radial direction, the cross-sectional shape of the protrusion rib is formed so as to form the upper and lower light beam noise reduction of the automatic washing machine clutch, characterized in that Type cushioning structure is provided.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 6 and 7.

6 is a cross-sectional view of the cushioning of the present invention, Figure 7 is a cross-sectional view of the main portion of the clutch mechanism to which the cushioning of the present invention is applied,

The present invention provides a dewatering tank (2) rotatably installed in the outer tank (1), a pulsator (3) installed in the dewatering tank (2) and rotatable independently of the dewatering tank (2), and a bearing case (20). The rotary shaft is supported by the rotary shaft and is supplied to the dehydration shaft 5 for transmitting rotational power to the dehydration tank 2, the washing shaft 4 for transmitting rotational power to the pulsator 3, and the stator 7a is energized. The BLDC motor 7 in which the rotor 7b rotates, the clutch motor 6 installed under the outer tub 1, the cam 600 coupled to the drive shaft of the clutch motor 6, and the bearing case ( The groove 800 and the inclined surface 801 which have the inclined surface 801 and linearly move by the guide of the lever guide 30 and the lever guide 30 fixed when the clutch motor 6 is driven. The lever 8 has a flat surface 802 extending horizontally from the lower end thereof, and the groove 800 having the inclined surface 801 of the lever 8 when dewatering is in contact with the inclined when switching to the washing mode. The movable member 9 which is lowered on the flat surface 802 and lowered on the flat surface 802 is interlocked when the movable member 9 moves up and down and moves up and down along the dehydration shaft 5 of the BLDC motor 7. A coupling 15 for switching the rotational power transmission path to the washing shaft 4 or the dewatering shaft 5, an outer connector 16a made of a resin fastened to the rotor 7b with a bolt, and the outer connector 16a. A coupling 15 is formed on the outer circumferential surface of the upper end which is integrally injection molded inside and engaged with the serration of the lower end of the washing shaft 4 on the inner circumferential surface thereof and exposed to the outside of the outer connector 16a. And an inner connector 16b made of metal having a serration 161b for coupling thereto, and a cushioning 18 installed in an annular groove 162a formed at the center of the upper surface of the outer connector 16a. In the fully automatic washing machine; An elastic rib 180 having an inner diameter smaller than an outer diameter of the inner connector 16b is formed under the inner edge of the cushion ring 18, and the elastic rib (ie, the lower surface of the cushion ring 18) is formed. The outer side of the 180 is formed with an annular groove 181 to give a radial margin to the elastic rib 180 in the radial direction, the lower surface of the coupling 15 of the upper surface of the cushioning 18 In the contacting portion with the lower surface of the coupling 15, the cushion ring 18 is in close contact with the groove to prevent the phenomenon of coming up, and to provide a cushion for forming a cushion, the cushion ring 18 The groove of the upper surface is formed by annular protruding ribs 183a, 183b and 183c spaced apart along the radial direction, and the protruding ribs 183a, 183b and 183c have a cross-sectional shape. 형성) is formed to form.

In this case, the protruding ribs 183a, 183b, and 183c may have a triangular shape, and the protruding ribs 183a, 183b, and 183c may have a rounded upper end portion.

The operation of the present invention configured as described above is as follows.

At the time of switching to the dehydration mode, the connecting rod 17 is returned to the right side in the drawing by the clutch motor 6 driving, and the coupling rod is coupled by the return force of the compression spring 40 as the movable rod 12 descends. As the ring 15 descends, the serration 150b on the lower side of the coupling and the serration 161b of the inner connector 16b are engaged to rotate the dehydration shaft.

In this case, the noise preventing cushion ring 18 is installed in the groove 162a inside the outer connector 16a. According to the present invention, each of the protruding ribs formed to form a coupling support on the upper surface of the cushion ring 18 ( 183a, 183b, and 183c form an upper and lower hollow structure such as a triangular shape in cross section, thereby effectively reducing noise.

In particular, when the power is switched to the dewatering mode, the coupling 15 and the inner connector 16b are engaged with each other and then the coupling 15 and the inner connector 16b are displaced by the rotation of the rotor 7b during the dehydration operation. When the coupling 15 descends momentarily strongly by the return force of the compression spring 40 while being resolved, unlike the conventional cushioning, the cushioning 18 of the present invention is provided with protruding ribs 183a and 183b. ) 183c has a structure such as a triangular shape with a sharp upper side, and the contact area with the lower end surface of the coupling 15 is small, and this part effectively reduces the noise by buffering.

On the other hand, according to the experiment it was confirmed that the cushioning 18 of the structure of the present invention has an effect of reducing the noise of about 2 ~ 5 dB compared to the cushioning of the conventional structure.

As described above, the present invention provides a clutch mechanism of a fully automatic washing machine in which the rotating power can be stably controlled in a short time when the rotating power is transmitted to the pulsator or the dehydration tank. It is possible to effectively reduce the noise generated when the coupling lowers due to the power switching to the dehydration mode.

Claims (3)

A dehydration tank rotatably installed in the outer tank, a pulsator installed in the dehydration tank and rotatable independently of the dehydration tank, a dehydration shaft rotatably supported by the bearing case to transmit the rotational power to the dewatering tank, and a rotation power to the pulsator A washing shaft for transmitting the pump, a BLDC motor in which the rotor rotates as the stator is energized, a clutch motor installed at the lower portion of the outer tank, a cam coupled to the driving shaft of the clutch motor, and a lever guide fixed on the bearing case; When the clutch motor is driven, a lever that is linearly guided by a guide of a lever guide, and a mover that moves up or down in association with a linear movement of the lever, and moves up and down along the dehydration shaft while interlocking when the mover moves up and down of the BLDC motor Coupling to switch the rotational power transmission path to the washing shaft or dewatering shaft, and the rotor is coupled to the rotor to reduce the rotational force of the rotor to the washing shaft The outer connector to be transmitted, and a serration coupled to the inside of the outer connector and engaged with the serration of the lower end of the washing shaft are formed on the inner circumferential surface of the outer connector and the coupling for coupling with the coupling on the outer circumferential surface of the upper end exposed to the outside of the outer connector. In the fully automatic washing machine including an inner connector is formed and a cushioning ring is provided in the annular groove formed in the center of the upper surface of the outer connector; An elastic rib having an inner diameter smaller than an outer diameter of an inner connector is formed under the inner edge of the cushioning ring, and a radially outer side of the elastic rib of the cushioning lower surface in a radial direction with respect to the elastic rib. An annular groove is formed to give a deformation margin, and a portion for contacting the lower surface of the upper surface of the cushioning ring with the coupling lower surface prevents the cushioning from sticking up to the lower surface of the coupling ring and gives a cushion. Is formed, the groove of the upper surface of the cushioning ring is formed by the annular protrusion ribs spaced apart along the radial direction, the cross-sectional shape of the protrusion rib is formed so as to form the upper and lower beams noise reduction of the automatic washing machine clutch, characterized in that Type cushioning structure. The method of claim 1, Noise reduction cushioning structure of the clutch for a full automatic washing machine, characterized in that the cross-sectional shape of the protruding ribs form a triangle. The method according to claim 1 or 2, Noise reduction cushioning structure of the clutch for the automatic washing machine, characterized in that the front end surface of the protruding rib is rounded structure.