KR20030077843A - method for controlling clutch motor in full automation type washing machine - Google Patents

Abstract

PURPOSE: A control method of a clutch motor for a full automatic washing machine is provided to control rotational force stably for a short time in transmitting power from the driving unit to a pulsator or a dehydrating tub, and to prevent noise by operating a clutch motor after releasing the restriction of the coupling. CONSTITUTION: Water is supplied(S1), and a cam is rotated by turning on a clutch motor in switching off(S2). Time is counted while turning on the clutch motor, and the clutch motor is decided to be switched on for the predetermined time(S3,S4). The pulse number of the clutch motor is counted since switching on, and compared with the reference value(S5,S6). The position of the cam is kept by turning off the clutch motor, and the clutch motor is turned off if the switch is turned off after the predetermined time(S7,S8). Restriction is released by rotating and reversing the BLDC(brushless direct current) motor, and the number of release operation is checked(S9,S10). The cam is operated by turning on the clutch motor in case of the release number to be less than the predetermined value(S11). The washing machine stops with displaying errors if the release number reaches the predetermined value(S12).

Description

Method for controlling clutch motor in 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 new power transmission mechanism for washing and rinsing by a low speed rotating pulsator and performing a dehydration by a high speed rotating dehydration tank.

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 spin and dewater. A structural example of this type is described in Japanese Patent Laid-Open No. 11-347289.

However, the method described in Japanese Patent Laid-Open No. 11-347289 has problems such as unstable operation because of the operation of the engagement clutch mechanism by the solenoid, and a lot of noise during engagement of the driving body.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and when the rotational power is transmitted to the pulsator or the dehydration tank by the drive unit of the stator and the rotor, the rotational power can be switched and controlled in a short time stably without noise. It is an object of the present invention to provide a clutch mechanism of a fully automatic washing machine and a control method thereof.

1 is a schematic diagram of a fully automatic washing machine to which the clutch mechanism of the present invention is applied;

2A and 2B are principal part longitudinal sectional views which show the action | action of the clutch mechanism of this invention,

2A is a state diagram at the time of washing

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

3A and 3B are enlarged views of main parts of FIGS. 2A and 2B;

3A is a state diagram at the time of washing

3B is a state diagram at the time of dehydration

4A is a bottom view along the line II of FIG. 2A

FIG. 4B is a bottom view along the line II-II of FIG. 2B

Figure 5 is an enlarged view showing the laundry shaft and deshrinkable structure of Figure 2a

6 is an enlarged view of a portion A of FIG. 2A;

7 is a cross-sectional view showing the main assembly state of the present invention, a state diagram before assembly of the power transmission elements for transmitting the power of the clutch motor to the coupling;

8 is a perspective view showing a state after assembly of FIG.

9 is a bottom perspective view of the coupling;

10 is a perspective view showing a rubber ring

11 is a cross-sectional view of FIG.

12 is a perspective view of a clutch motor

13 is an exploded perspective view of FIG. 12;

14A to 14C are schematic views for explaining an operation relationship between a cam and a switch when the clutch motor is driven according to the present invention.

14A is a cam and switch state diagram at a washing mode maintenance point

14B is a cam and switch state diagram immediately before switching to the dehydration mode.

14C is a cam and switch state diagram at an initial point

15 is a time chart showing an operation relationship between a clutch motor, a cam, and a switch of the present invention;

16 is a time chart showing the operation of the initial washing BLDC motor and clutch motor of the washing machine according to the present invention;

17 is a time chart showing the operation of the BLDC motor and clutch motor at the end of washing and dehydration of the washing machine according to the invention

18 is a flowchart illustrating a clutch motor control process when the laundry mode is switched according to the present invention.

19 is a flowchart illustrating a clutch motor control process when the dehydration mode is switched according to the present invention.

Explanation of symbols on the main parts of the drawings

1: Outer tank 2: Dewatering tank

3: pulsator 4: washing shaft

5: Dehydration 5a: Upper Shaft

5b: Lower shaft 6: clutch motor

600: cam 600a: cam home

601: rod connecting shaft 602: driving shaft

650: switch 650a: protrusion

7: BLDC motor 7a: stator

7b: Rotor 8: Lever

800: groove 801: inclined surface

802: flat surface 803: locking projection

805: Stopper 9: Operator

900: Information Home 901: Information Service

902: guide rib 10: plunger

100: stripping prevention piece 11: shock spring

12: movable rod 12a: connection portion

12b: retaining pin 13: tension spring

14: return spring 15: coupling

150a, 150b: Serration 151: Gear

152: flange 154: protrusion

16: Connector assembly 16a: Outer connector

162a: Seating groove 16b: Inner connector

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

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

17: Connecting rod 18: Rubber ring

180: elastic rib 181: groove

182: groove 183: protrusion rib

20: Shaft support bearing case 22: Coupling stopper

220: support bracket 221: gear tooth

23: Upper shaft support bearing 24: Lower shaft support bearing

30: Lever Guide 30a: Information Center

30a-1: Guiding groove 40: Compression spring

51: ball bearing 52: C-ring

53: sealing member 530: lips

54: sealing member 540a, 540b: lips

In order to achieve the above object, the present invention is composed of a rotor connected to the washing shaft and the stator is installed on the outside to surround the rotor BLDC motor to form a drive source of the washing machine, washing and dehydration by raising or lowering the coupling Coupled to transfer the power to the washing shaft and the dehydration shaft installed on the outside when washing, by transmitting and moving the clutch motor to the position of the city, and by lifting and lowering in conjunction with the driving of the clutch motor. A clutch motor control method of a full automatic washing machine having a ring; A first step of performing a water supply for washing; a second step of turning on the clutch motor by turning on the clutch motor in a switch-off state where the cam of the clutch motor is located at an initial point after performing the water supply; and at the same time as the clutch motor is turned on A third step of counting, a fourth step of determining whether the conversion of the clutch motor to the switched on state according to the cam rotation has been made within a set time, and the determination result of the fourth step to the switched-on state A fifth step of counting the number of pulses generated in the clutch motor immediately after the switch-on when the conversion is made within the set time; and a sixth step of determining whether the number of pulses counted by the execution of the fifth step reaches the set number of pulses. And a seventh step of maintaining the cam position by turning off the clutch motor when the number of pulses reaches the set number of pulses as a result of the determination in the sixth step; As a result of the determination, if the switch is not turned on even after the set time is exceeded, the eighth step of turning off the clutch motor, and after performing the eighth step, the BLDC motor is inverted left and right for a predetermined period of time to perform the restraining operation. If the number of times of performing the restraint release operation of the BLDC motor is less than the set number of times to perform the ninth step of performing the check, the frequency of performing the restraint operation of the BLDC motor, and the check result in the tenth step, the clutch motor is restarted. An eleventh step of carrying out a second step of driving the cam; and an operation of displaying an error and stopping the washing machine when the number of executions of the restraint release operation of the BLDC motor reaches the set number of times as a result of the check in the tenth step. Provided is a clutch motor control method of a fully automatic washing machine, characterized in that it comprises 12 steps.

On the other hand, according to another aspect of the present invention for achieving the above object, a BLDC motor consisting of a rotor connected to the laundry shaft and a stator installed on the outside to surround the rotor to form a driving source of the washing machine, and the coupling is raised Or by lowering the clutch motor to be sent to the position when washing and dehydration, the drive is driven up or down in conjunction with the driving of the clutch motor to transfer power only to the washing shaft when washing, and dewatering installed on the washing shaft and the outside when dewatering A clutch motor control method of a fully automatic washing machine having a coupling for simultaneously transmitting power by contraction; A first step of turning on the clutch motor to rotate the cam while the cam of the clutch motor is switched on at a maintenance point; a second step of counting time simultaneously with the clutch motor on; and switching off of the clutch motor according to cam rotation. a third step of determining whether the transition to the (off) state has been made within the set time; and the clutch motor driving time immediately after the switch-off if the transition to the switch-off state is made within the set time as a result of the determination in the third step; A fourth step of newly counting the number of steps; a fifth step of determining whether the driving time counted by the fourth step has reached a set time; and a clutch motor immediately after switching off as a result of the determination in the fifth step. The sixth step of keeping the cam position at the initial point by turning off the clutch motor when the drive time reaches the set time; The seventh step of turning off the clutch motor if the switch is not switched on even after the set time is exceeded, and the eighth step of performing the restraining operation by inverting the BLDC motor for a predetermined period of time for a predetermined time after performing the seventh step. And the ninth step of checking the number of times of the restraint operation of the BLDC motor, and if the number of times of the restraint operation of the BLDC motor is less than the set number of execution times as a result of the check in the ninth step, turn on the clutch motor again. A tenth step of carrying out the first step of driving the motor; and an eleventh step of displaying an error and stopping the washing machine when the check result of the ninth step reaches the Provided is a clutch motor control method of a fully automatic washing machine characterized in that it comprises.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 19.

1 is a schematic view of a fully automatic washing machine to which the clutch mechanism of the present invention is applied, and FIGS. 2A and 2B are main portion longitudinal cross-sectional views illustrating the operation of the clutch mechanism of the present invention, and FIGS. 3A and 3B are enlarged main parts of FIGS. 2A and 2B. Figure 4a is a bottom view along the line II-I of Figure 2a, Figure 4b is a bottom view along the line II-II of Figure 2b, the automatic washing machine of the present invention is rotated inside the outer tank (1) of the body A dewatering tank (2), which is installed as possible, a pulsator (3) installed in the dewatering tank (2) and rotatably installed independently of the dewatering tank (2), and a shaft support bearing case (20; FIG. 2A). And a dehydration shaft (5) for rotationally supporting the dehydration tank (2), a washing shaft (4) for transmitting rotational power to the pulsator (3), and a stator (7a). As the rotor 7b rotates, the power transmission path of the BLDC motor 7 and the BLDC motor 7 corresponding to the washing or dehydrating stroke It is configured to include a clutch mechanism that can be switched to the washing shaft (4) or dewatering shaft (5).

In this case, the clutch mechanism includes a clutch motor 6 installed below the outer tub 1, a cam 600 coupled to the drive shaft 602 of the clutch motor 6, and the shaft support bearing case 20. Lever 30 is fixed on the groove, and the groove 800 and the inclined surface 801 having a linear movement and linearly guided by the guide of the lever guide 30 when the clutch motor 6 is driven A lever 8 having a flat surface 802 extending horizontally from the cam, and between the cam 600 and the lever 8 of the clutch motor 6 so as to turn on the lever 8 when the clutch motor 6 is turned on. A connecting rod 17 which pulls toward the clutch motor 6 side, and one end is fixed to the front end of the lever guide 30, and the other end is fixed to the locking projection 803 on one side of the lever 8, the lever 8 The inclined surface in contact with the return spring 14 for imparting a return force to the groove 800 having the inclined surface 801 of the lever 8 when dewatering, Plunger 10 installed to move up and down along the guide cylinder 900 inside the hollow cylinder-type mover (9) and the movable member (9) to be lowered by riding down the 801 to the flat surface 802 ), A cushioning spring 11 positioned between the mover 9 and the plunger 10, and a gear 221 fixed to the lower portion of the axial support bearing case 20 and formed along the circumferential direction is provided. One end of the coupling stopper 22 and the lower end of the plunger 10 are hinged, and a middle point is hinged to the lower end of the support bracket formed below the coupling stopper 22 so that the hinge stops when the plunger is lifted. BLDC motor 7 while elevating along the dehydration shaft 5 direction according to the rotation direction of the fork-shaped movable rod 12 and the movable rod 12 in a fork-shaped movable rod 12 around the middle of one point. Of the coupling 15 and the rotor 7b for switching the rotational power transmission path of the Power is configured to include a connector assembly 16 which is interposed to be delivered to the washing shaft (4).

At this time, the clutch motor 6 is a geared motor that transmits power to the drive shaft 602 connected to the cam 600 by decelerating through a reduction gear provided therein.

Meanwhile, 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 the outer connector 16a, and the lower end of the washing shaft 4 on the inner circumferential surface thereof. The inner connector 160 is formed to engage with the serration of the metal connector, and the serration 161b for coupling with the coupling 15 is formed on the outer circumferential surface of the upper end exposed to the outer connector 16a. It consists of 16b.

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

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

On the other hand, Figure 5 is an enlarged view showing the laundry shaft and deshrinkable structure of Figure 2a, the dehydration shaft 5 is different from the existing dehydration shaft, the upper shaft portion (5a) inside the upper end of the lower shaft portion (5b) having a large inner diameter It is press-fitted and coupled, and the upper end of the lower shaft portion 5b supports the upper shaft support bearing 23 supporting the dehydration shaft 5.

In addition, a stage 400 is formed at the lower end of the washing shaft 4, and a corresponding stage is formed on the inner circumferential surface of the inner connector 16b to couple the inner connector 16b to the lower end of the washing shaft 4. The tightening position should be limited when tightening the nut.

In addition, a predetermined gap is provided between the lower end surface of the lower shaft portion 5b of the dehydration shaft 5 and the upper end surface of the inner connector 16b, so as to prevent bending of the shaft during a packaging fall or other impact of the washing machine. The inner connector 16b and the lower end surface of the lower shaft portion 5b of the dehydration shaft 5 are configured to contact first.

At this time, the gap G1 between the inner connector 16b and the dehydration shaft 5 is a gap G2 between the ball bearing 51 and the C-ring 52 that radially support the lower portion of the washing shaft 4. It is formed to be smaller than).

In addition, a sealing member 53 (sealing member) for preventing moisture penetration between the washing shaft 4 and the dehydration shaft 5 is interposed at the upper end of the washing shaft 4, and inside the sealing member 53. At least three or more lips 530 are formed to ensure the reliability of the sealing.

On the other hand, Figure 6 is an enlarged view of the portion A of Figure 2a, a seal for sealing between the dehydration shaft 5 and the shaft support bearing case 20 also on the upper shaft support bearing 23 for supporting the dehydration shaft (5). The member 54 is interposed, and at least four stages of lips 540a are formed at the inside of the sealing member 54 to secure the reliability of the sealing, and at least three stages of lips 540b are formed at the outside.

On the other hand, Figure 7 is a cross-sectional view for explaining the main assembly process of the clutch mechanism of the present invention, Figure 8 is a perspective view showing the post-assembly state of Figure 7, the upper end of the plunger 10 fitted inside the mover (9) On the outer circumferential surface, a mover removal preventing piece 101 for preventing the mover 9 from being separated from the plunger 10 when assembling the plunger 10 and the mover 9 via the buffer spring 11 is provided. It is provided.

That is, on the outer circumferential surface of the upper end portion of the plunger 10 fitted inside the mover 9, a movable release prevention piece 101 protruding in a radial direction is provided, and the shock absorbing spring 11 is provided on the outer circumferential surface of the plunger 10. When the plunger 10 is press-fitted into the mover 9 while the compression spring is fitted, the mover removal preventing piece 101 of the plunger 10 is axially disposed on one side of the outer circumferential surface of the mover 9. Is located in the guide hole 901 is formed, whereby the mover (9) is pushed to the upper by the restoring force of the shock absorbing spring (11) of the movable member 9 at the lower end of the movable member removal prevention piece (101) The lower end of the guide hole 901 prevents the movable member 9 from being removed from the plunger 10.

In addition, a guide rib 902 having a length in the axial direction is formed on the outer circumferential surface of the movable element 9, and the inner side of the guide portion 30a of the lever guide 30 into which the movable element 9 is inserted is formed. Guide ribs 902 are joined to form guide grooves 30a-1 to assist the linear movement of the mover 9.

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 return spring 14 is formed in a ring shape so that one end thereof is caught by the locking protrusion 803 of the lever 8, and the other end thereof is hooked to the rear end of the lever guide 30 to fix the position. It is wound to have a larger diameter (D2) than the diameter (D1) of.

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.

Meanwhile, referring to FIGS. 2A and 2B, between the upper surface of the coupling 15 and the lower bearing 24, a compression spring 40 for pushing the coupling 15 downward when switching to the dehydration mode is performed. ) Is provided.

2A to 3B and FIGS. 7 and 8, projections are formed on the outer side of the coupling stopper 22 to be positioned between the plunger 10 and the support bracket 220 of the coupling stopper 22. 222 is provided, the fork-type movable rod 12 directly below the protrusion 222 is provided with a connecting portion 12a for connecting across both rods, dehydration between the protrusion 222 and the connecting portion 12a When the movable rod 12 is rotated clockwise around the fixing pin 12b is provided with a tension spring 13 for imparting a rotational force.

On the other hand, the front end portion of the movable rod 12 is in a rounded form so as to reduce the frictional force to the front end portion that is in contact with the lower surface of the flange portion 152 of the coupling (15).

9 is a bottom perspective view of the coupling, in which the coupling 15 is provided with a flange portion 152 extending radially in the upper end of the cylindrical body, and the coupling stopper 22 at the upper edge of the flange portion 152. The gear teeth 151 which can be fitted to the gear teeth 221 of the () are formed along the circumferential direction, and the serration on the outer peripheral surface of the upper end of the inner connector 16b constituting the connector assembly 16 and the serration of the dehydration shaft 5 on the inner circumferential surface. Serrations 150a and 150b are provided to engage with 161b.

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 module ratio of the serration 150a formed on the inner circumferential surface of the coupling 15 and the serration 150b formed on the lower portion is preferably 1: 1.5.

On the other hand, the lower end of the serration (150b) located on the lower side of the large pitch of the serration formed on the inner peripheral surface of the coupling 15 is engaged and separated from the serration (161b) of the inner connector (16b) It is rounded to make it easier.

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.

In addition, a plurality of protrusions 154 are formed along the circumferential direction on the bottom surface of the body of the coupling 15.

That is, the protrusion 154 formed along the circumferential direction on the lower surface of the body of the coupling 15 has the coupling 15 and the outer connector 16a when the coupling 15 is lowered by switching to the dehydration mode. It acts to reduce the contact area with the rubber ring 18, which is an elastic member seated in the elastic member seating groove (162a) of.

FIG. 10 is a perspective view showing the shape of a rubber ring, and FIG. 11 is a cross-sectional view of FIG. 10, wherein the rubber ring 18 has an elastic rib having an inner diameter below the inner rim thereof having a dimension slightly smaller than the outer diameter of the inner connector 16b. 180 is formed, and the outer surface of the elastic ribs 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 ribs 180, the upper surface A portion of the coupling 15 contacting the bottom surface of the coupling 15 is provided with a groove 182 for preventing a phenomenon that the rubber ring 18 comes close to the lower surface of the coupling 15 and gives a cushion.

At this time, the groove 182 of the upper surface of the coupling 15 is formed by an annular protruding rib 183 spaced apart along the radial direction.

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

The clutch mechanism according to the present invention maintains a state in which the coupling 15 is lowered as shown in FIGS. 2B and 3B as an off state in which power is not applied to the clutch motor 6 before washing is started.

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.

When power is applied to the clutch motor 6 in such a state and the clutch motor 6 is turned on, the driving force of the clutch motor 6 is transmitted to the cam 600 through the drive shaft 602. The connecting rod 17 is moved toward the clutch motor 6 by the rotational movement of the cam 600. Accordingly, the lever 8 is guided by the lever guide 30 and the lever 8 is pulled toward the clutch motor 6.

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. 4A. Is located at the holding point, the mover 9 is positioned below the flat surface 802 of the lever 8 as shown in FIGS. 2A and 3A.

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 according to the lowering of the plunger 10 is a support bracket 220 of the coupling stopper 22 fixed to the lower portion of the shaft support bearing case 20. It rotates counterclockwise on the drawing about the fixing pin 12b at one point of the middle portion penetrating the center.

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 teeth 151 formed at the upper end of the coupling 15 are fixed on the lower surface of the shaft support bearing case 20 as shown in FIGS. 2A and 3A. The gear provided to the coupled coupling stopper 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, when the washing mode is switched to the washing mode, the clutch motor 6 is maintained in the off state, which is due to the configuration and operation of the clutch motor of the present invention. The configuration and operation of the clutch motor of the present invention to be maintained will be described in detail later.

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

2A and 3A, the washing is in progress, and when the washing is completed and the power transmission path switching to the dehydration mode is required to proceed with the dehydration, power is again applied to the clutch motor 6 to perform the clutch motor. The cam 600 rotates by driving.

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 of the lever 8 when the return of the lever 8 is completed as shown in FIGS. 2B and 3B. 801 is located in 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 to the plunger 10 as the plunger 10 rises is supported by the support bracket 220 of the coupling stopper 22 fixed to the lower portion of the axial support bearing case 20. ) Rotates in a clockwise direction on the drawing (see FIGS. 2A and 3A) centering on the fixing pin 12b installed through.

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 as described above, 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, the serrations 150a and 150b of the inner circumferential surface of the coupling 15 are serrations 161b on the outer circumferential surface of the upper end of the inner connector 16b coupled to the washing shaft 4. And it is engaged with the serration of the lower end of the dehydration shaft (5), respectively, so that the high-speed rotation of the washing shaft (4) and the dehydration shaft (5) during the high-speed rotation of the rotor (7b) proceeds to dehydration.

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.

In particular, the lower end portion of the lower serration 150b rounded with the coupling 15 is formed to form an involute profile surface, so that it is clogged with the serration 161b of the inner connector 16b. Ching and declutching are made easier.

In addition, the points where the valleys of the lower surface of the upper serration 150a formed on the inner circumferential surface of the coupling 15 and the valleys of the lower serration 150b meet each other are rounded to prevent rapid cross-sectional change. The force that the serration of the ring 15 withstands torsional stress is increased.

On the other hand, when the washing coupling 15 enters the washing position by driving the clutch motor 6 in the power switching process to the washing mode, the coupling 15 to the gear 221 of the coupling stopper 22 is engaged. In the case where the gear position of 151 does not match the engagement position of the coupling 15, a state may be instantaneously restrained.

That is, since the coupling stopper 22 is fixed on the shaft support bearing case 20, the position of the gear 221 is constant, but the coupling 15 is rotatable with the dehydration shaft 5, so that the gear is stopped at the stop. The position of 151 is variable.

Accordingly, when switching to the washing state, the peak portion of the gear 151 of the coupling 15 and the peak portion of the gear 221 of the coupling stopper 22 may come into contact with each other. Is called a momentary restraint state for the coupling 15.

At this time, since the coupling 15 is slightly engaged with the serration 161b on the outer circumferential surface of the upper end of the inner connector 16b, the coupling 15 rotates, and as the peak of the gear on the coupling side meets the valley of the gear on the inner connector side, the coupling 15 rotates. The gear teeth 151 of the 15 and the gear teeth 221 of the coupling stopper 22 are naturally driven by the pushing action of the shock absorbing spring 11 provided between the mover 9 and the plunger 10 of the clutch mechanism of the present invention. The engagement is released to release the momentary restraint state for the coupling 15.

On the other hand, instead of the serration is formed in the lower end of the washing shaft (4), the lower end of the washing shaft is in the shape of a square shaft, the inner connector (16b) to form a hollow square ring shape to match the hollow shaft in the shaft It may be combined.

In the above-described embodiment, the coupling rod 17 and the lever 8 are hinged, but the coupling between the connecting rod 17 and the lever 8 is not a hinge coupling. The material of the connecting rod may be made of a flexible material.

Hereinafter will be described a clutch motor applied to the present invention.

First, FIG. 12 is a perspective view of a clutch motor, and FIG. 13 is an exploded perspective view of FIG. 12. Hereinafter, the structure and operation of the clutch motor of the present invention will be described in detail with reference to these drawings.

In the clutch motor 6 of the present invention, the cam 600 is directly coupled to the drive shaft 602 so that the cam 600 rotates at a constant speed when the drive shaft 602 is rotated, and the cam at the position where the drive shaft 602 stops. 600) Also stopped.

For reference, the clutch motor 6 of the present invention changes and improves the structure of the drainage motor generally used for driving the drain valve, and is configured as a clutch mechanism driving motor, and a motor driving part such as a rotor and a stator has a conventional drainage motor. Is the same as

However, the drainage motor used for driving the drainage valve has a slip between the cam and the drive shaft to have a certain degree of slip, and the cam is rapidly returned when the drainage motor is turned off. Clutch motor 6 of the cam 600 and the drive shaft 602 is an assembly structure with no slip at all is prevented in the end (速 斷), thereby forming a range of the angle of the cam groove provided in the cam 600 also existing drainage It is formed differently from the cam of the motor.

That is, the clutch motor 6 of the present invention does not rotate the cam 600 unless the drive shaft 602 is rotated, the torque required for the rotation of the drive shaft 602 is larger than the restoring force of the return spring 14 Since the fastening of the cam 600 is prevented even when the clutch motor 6 is turned off, the occurrence of collision noise and the like due to the rapid return of the coupling 15 and the lever 8 is prevented, thereby realizing low noise during clutch operation. It becomes possible.

14A to 14C are schematic views for explaining an operation relationship between a cam and a switch when the clutch motor is driven. FIG. 14A is a state diagram of a cam and a switch at a washing mode maintenance point, and FIG. 14B is a view of switching to a dehydration mode. FIG. 14C is a cam and switch state diagram at an initial point. FIG.

15 is a time chart showing the operation relationship between the clutch motor, the cam and the switch of the present invention. Referring to these drawings, the operation relationship between the clutch motor, the cam, and the switch will be described below.

First, in the state where the cam 600 is located at the initial point, the switch 650 maintains the off state. Here, the state where the cam 600 is located at the initial point is a state in which the rod connecting shaft 601 of the cam 600 faces the initial point direction as shown in FIG. 14C.

In this state, when the power transmission path is switched for washing, the clutch motor 6 is turned on and driven, thereby rotating the cam 600 clockwise. At this time, since the projection 650a of the switch 650 is located on the cam groove surface 600a until the rotation angle of the cam 600 reaches a position that is 150 degrees from the initial point, the switch 650 is turned off. State is maintained.

Then, when the rotation angle from the initial point of the cam 600 reaches 150 degrees, the projection 650a of the switch 650 is out of the cam groove surface 600a of the cam 600, so that the switch 650 is turned on. (on)

As such, when the rotation angle from the initial point of the cam 600 reaches 150 degrees, the peak of the gear 151 of the coupling 15 and the peak of the gear 221 of the coupling stopper 22 It is in a state of being in mutual engagement.

However, even after that, the on state of the clutch motor 6 continues, and when the cam 600 reaches the point 170 degrees from the initial point as shown in FIG. 14A, the clutch motor 6 is turned off. Thus, the clutch motor 6 ) Is turned off at the maintenance point of the cam 600 in order to more reliably switch the power to the washing mode.

On the other hand, when dehydration after washing is completed, the cam 600 should return to the initial point position.

To this end, when the power is switched to the dehydration mode, the clutch motor 6 is turned on again to rotate the cam 600 clockwise. At this time, the switch 650 maintains the on state, and when the rotating cam 600 passes the point 328 degrees clockwise from the initial point (158 degrees clockwise from the holding point), the protrusion of the switch 650 ( 650a is positioned on the cam groove surface 600a, whereby the switch 650 is turned off by contact dropping (see FIG. 14B).

Thereafter, even if the switch 650 is switched to the off state, the clutch motor 6 remains in the on state until the cam 600 reaches the initial point under the control of the microcomputer, so that the cam 600 is positioned at the initial point. Is off.

At this time, the clutch motor 6 is kept in the on state from immediately after the switch 650 is turned off until the cam 600 reaches the initial point, so that the on state of the clutch motor 6 is controlled in time. Since the rotation period of the clutch motor 6 is constant, the angle of arrival (that is, 32 degrees) from the off point of the switch 650 to the initial point is divided into one rotation period to keep the clutch motor 6 in the on state. The time is calculated.

On the other hand, in the state where the cam 600 is located at the initial point as described above, not only the gear teeth 151 of the coupling 15 and the gear teeth 221 of the coupling stopper 22 are released, but the coupling ( 15) The upper serration 150a and the lower serration 150b of the inner circumferential surface of the lower serration 161b on the outer circumferential surface of the upper end of the inner connector 16b coupled to the washing shaft 4 and the lower end of the dehydration shaft 5 By being engaged with each other at the same time, the dehydration by simultaneous rotation of the washing shaft 4 and the dewatering shaft 5 can be made.

Hereinafter, the process of restraining the coupling performed before and after switching to the washing and dehydration mode performed as described above will be described with reference to FIGS. 16 and 17.

FIG. 16 is a time chart illustrating operations of an initial BLDC motor and a clutch motor of a washing machine according to the present invention. First, with reference to FIG. 16, the coupling 15 may be restrained before and after switching from the dehydration mode to the washing mode. Explain the process of termination.

After the water supply is completed, the serrations 150a and 150b of the inner circumferential surface of the coupling 15 are dewatered by staggering the dehydration shaft 5 and the inner connector 16b engaged with the coupling 15 when washing is performed. 5) As a result of receiving the surface pressure acting in opposite directions from the serration of the lower end and the serration 161b of the inner connector 16b, the rise of the coupling 15 may be restrained when the clutch motor is driven. .

Accordingly, in the present invention, after the water supply for washing is completed, the clutch motor 6 is turned on to release the coupling 15 before the coupling 15 is raised to the washing mode position. Inverting the BLDC motor 7 to the left and right to prevent the coupling 15 from being restrained.

That is, the BLDC motor 7 is inverted left and right for a predetermined time while the BLDC motor 7 has a rotation angle shorter than the rotation angle at the washing time before the clutch motor 6 is driven for switching to the washing mode.

In addition, after the switching to the washing mode is completed by the operation of the clutch motor 6, the BLDC motor 7 is inverted left and right for a predetermined period of time just before performing the main washing, and then the main washing having the normal reversing cycle is performed. Proceed so as not to overload the system at the beginning of the wash.

Next, with reference to FIG. 17, the restraining process of the coupling 15 performed before and after switching from the washing mode to the dehydration mode is demonstrated.

FIG. 17 is a time chart illustrating the operation of the BLDC motor and the clutch motor at the end of washing of the washing machine and the initial stage of dehydration according to the present invention, and the coupling with the coupling 15 when switching to the dehydration mode after the end of washing. By interlacing with the stopper 22, the surface pressures in the opposite directions are acted between the gear teeth 151 of the coupling 15 and the gear teeth 221 of the coupling stopper 22 so that the clutch motor 6 When driving, a phenomenon in which the lowering of the coupling 15 is restrained may occur.

Accordingly, in the present invention, the coupling 15 immediately before performing the step of lowering the coupling 15 to the dehydration mode position by turning on the clutch motor 6 to switch to the dehydration mode after the end of washing. Inverting the BLDC motor 7 to the left and right to release the restraint).

At this time, the BLDC motor 7 is controlled to invert left and right for a predetermined time while having a rotation angle shorter than the rotation angle during washing when driving for left and right inversion.

In addition, after switching to the dehydration mode is completed, the BLDC motor 7 is inverted left and right for a predetermined period of time just before performing the dehydration so that the coupling 15 and the inner connector 16b can be more reliably combined. Then proceed to full-scale dehydration.

Hereinafter, a control process of the clutch motor for washing and dehydration will be described with reference to FIGS. 18 and 19.

18 is a flowchart illustrating a clutch motor control process when the laundry mode is switched according to the present invention, and FIG. 19 is a flowchart illustrating a clutch motor control process when the dehydration mode is switched according to the present invention.

First, a process of controlling a clutch motor for performing washing will be described first with reference to FIG. 18.

When the washing mode is entered, water for washing is performed (first step). At this time, the cam 600 of the clutch motor is located at an initial point, and the switch 650 is in an off state.

Subsequently, after the water supply is completed, the clutch motor 6 is turned on so that the cam 600 rotates (second step), and at the same time, the time is counted (third step).

Then, as the time is counted, it is continuously checked whether the conversion of the clutch motor 6 to the on state of the clutch motor 6 according to the rotation of the cam 600 is performed within the set time (fourth step).

In this way, when the switching of the clutch motor 6 to the on state of the switch 650 is made within the set time, the number of pulses generated in the clutch motor 6 immediately after the switching of the switch 650 to the on state is achieved. It is counted (step 5).

Subsequently, it is determined whether the counted pulse number has reached the set pulse number (sixth step). As a result, when the pulse number reaches the set pulse number, the clutch motor 6 is turned off to maintain the cam position (seventh step). step). At this time, the cam 600 is located at the maintenance point for performing the washing mode.

On the other hand, as a result of performing the step (fourth step) of checking whether the switching of the clutch motor 6 to the on state of the clutch motor 6 according to the cam rotation has been made within the set time, the switch is exceeded even if the set time is exceeded If it is not changed to the on state, the clutch motor 6 is turned off (eighth step), and the BLDC motor 7 is inverted left and right for a predetermined time in a short time period to perform the restraining operation (first step). Step 9).

At this time, the restraint release operation of the BLDC motor 7 is checked the number of executions (step 10). If the restraint release operation number does not reach the set number of executions, the process returns to the second step again and again the clutch motor. (6) is turned on to drive the cam 600 (11th step). On the other hand, when the number of times of performing the restraint release operation of the BLDC motor 7 reaches the set number of executions, an error is displayed. (Not shown) to stop the washing machine (step 12).

In the above, the time required for the clutch motor 6 to be turned on after the water supply is completed and the internal switch 650 of the clutch motor 6 is turned on is rated voltage applied to the clutch motor 6. When the frequency of 50 kHz or 60 kHz is preferably set within 5 seconds to be applied in common. That is, the time required for the cam 600 of the clutch motor 6 to rotate one time is set to 12 seconds when the frequency is 50 Hz by the deceleration action of the reduction gear in the clutch motor 6, In this case, the frequency is set to 10 seconds, so that the cam 600 moves by an angle of 150 degrees, which is an angle of movement from the initial point to the point where the internal switch 650 of the clutch motor 6 is turned off. It is set as 5 seconds so that it can be applied to both the case and the case of 60㎐.

On the other hand, one rotation time of the cam 600 can be equally applied to the control process of the clutch motor 6 during dehydration described later.

Next, a process of controlling the clutch motor 6 for performing dehydration will first be described with reference to FIG. 19.

At the end of washing, the clutch motor 6 is in the off state, and the switch 650 inside the clutch motor 6 is in the on state because the cam 600 is located at the washing maintenance point.

Accordingly, when switching to the dehydration mode, the clutch 600 is first turned on in the cam 600 of the clutch motor 6 at the switch 650 at the holding point, so that the cam 600 is rotated (first). At the same time, the time is counted (second step).

Then, as time is counted, it is continuously checked whether the conversion of the clutch motor 6 to the off state of the switch 650 according to the cam rotation has been made within the set time (third step).

In this way, when the switching of the clutch motor 6 to the off state of the switch 650 is made within the set time, the driving time of the clutch motor 6 immediately after the switch 650 off state is newly counted. (Step 4).

Subsequently, it is determined whether the counted clutch motor 6 driving time has reached the set time (step 5). As a result, immediately after the switch 650 is turned off, the newly counted clutch motor 6 driving time has reached the set time. In this case, by turning off the clutch motor 6, the cam position is maintained at the initial point.

On the other hand, in the control as described above, when the switch 650 is not turned on even if the check result setting time in the third step is exceeded, the clutch motor 6 is turned off (seventh step). The BLDC motor 7 is inverted left and right for a predetermined period of time in a short time period so that the restraining operation is performed (step 8).

At this time, the restraint release operation of the BLDC motor 7 is checked the number of executions (step 9), and if the restraint release operation number does not reach the set number of executions, the process returns to the first step again and again the clutch motor (6) is turned on to drive the cam 600 (step 10), while on the other hand, if the number of times of the restraint release operation of the BLDC motor 7 reaches the set number of times, an error is displayed and the washing machine is stopped. (Step 11).

In the above description, the time required for the clutch motor 6 to be turned on to switch to the dehydration mode and the internal switch 650 of the clutch motor 6 is turned off is set to the clutch motor 6. It is desirable that the frequency of the rated voltage is set within 7 seconds so that it can be commonly used when 50 kHz or 60 kHz.

That is, the time required for the cam 600 of the clutch motor 6 to rotate one time is set to 12 seconds when the frequency is 50 Hz by the deceleration action of the reduction gear in the clutch motor 6, In this case, the frequency is set to 10 seconds so that the cam 600 moves by an angle of 158 degrees, which is a moving angle from the holding point to the point where the internal switch 650 of the clutch motor 6 is turned off. It is set to 7 seconds so that it can be commonly applied to the case of 와 and 60㎐.

As described above, the present invention has an effect that the rotational power transmitted to the washing shaft or dewatering shaft can be stably controlled in a short time when the rotational power is transmitted to the pulsator or dehydration tank by the drive unit of the stator and the rotor. .

In addition, the present invention is a clutch mechanism when the drive shaft and the cam is rotated at constant speed when the clutch motor is on, and there is no rapid return action of the cam when off, so that there is no occurrence of collision noise due to the rapid return and the power switching is realized in a low noise state. Can be realized.

In addition, the washing machine of the present invention performs the switching to the washing and dehydration mode in the state of releasing the restraint of the coupling by inverting the BLDC motor left and right prior to the switching to the washing and dehydration mode. In this case, when the clutch motor is restrained during the switching operation to the washing and dehydration mode, the clutch motor is operated after detecting the restraint state of the coupling by the control of the switching time of the clutch motor. The clutching action is more stable and sure.

Claims (4)

A BLDC motor comprising a rotor connected to a washing shaft and a stator installed outside the rotor to form a driving source of the washing machine, a clutch motor that raises or lowers a coupling to be sent to a position during washing and dehydration, and the clutch Method of controlling the clutch motor of a fully automatic washing machine provided with a coupling to move the power to the washing shaft when washing the drive by driving in conjunction with the driving of the motor, and to transmit the power simultaneously to the washing shaft and the dehydrating shaft installed on the outside when dewatering. To; A first step of performing a water supply for washing; a second step of turning on the clutch motor by turning on the clutch motor in a switch-off state where the cam of the clutch motor is located at an initial point after performing the water supply; and at the same time as the clutch motor is turned on A third step of counting, a fourth step of determining whether the conversion of the clutch motor to the switched on state according to the cam rotation has been made within a set time, and the determination result of the fourth step to the switched-on state A fifth step of counting the number of pulses generated in the clutch motor immediately after the switch-on when the conversion is made within the set time; and a sixth step of determining whether the number of pulses counted by the execution of the fifth step reaches the set number of pulses. And a seventh step of maintaining the cam position by turning off the clutch motor when the number of pulses reaches the set number of pulses as a result of the determination in the sixth step; As a result of the determination, if the switch is not turned on even after the set time is exceeded, the eighth step of turning off the clutch motor, and after performing the eighth step, the BLDC motor is inverted left and right for a predetermined period of time to perform the restraining operation If the number of times of performing the restraint release operation of the BLDC motor is less than the set number of times to perform the ninth step and check the number of times the restraint operation of the BLDC motor; An eleventh step of carrying out a second step of driving the cam; and an operation of displaying an error and stopping the washing machine when the number of executions of the restraint release operation of the BLDC motor reaches the set number of times as a result of the check in the tenth step. Clutch motor control method of a full automatic washing machine characterized in that it comprises a 12 step. A BLDC motor comprising a rotor connected to a washing shaft and a stator installed outside the rotor to form a driving source of the washing machine, a clutch motor that raises or lowers a coupling to be sent to a position during washing and dehydration, and the clutch A clutch motor of a fully automatic washing machine having a coupling that transfers power only to the washing shaft when washing by driving up or down by interlocking with the driving of the motor, and simultaneously transmitting power to the washing shaft and a dehydrating shaft installed outside the washing machine when dewatering. In a control method; A first step of turning on the clutch motor to rotate the cam while the cam of the clutch motor is switched on at a maintenance point; a second step of counting time simultaneously with the clutch motor on; and switching off of the clutch motor according to cam rotation. a third step of determining whether the transition to the (off) state has been made within the set time; and the clutch motor driving time immediately after the switch-off when the transition to the switch-off state is made within the set time as a result of the determination in the third step A fourth step of newly counting the number of steps; a fifth step of determining whether the driving time counted by the fourth step has reached a set time; and a clutch motor immediately after switching off as a result of the determination in the fifth step. The sixth step of keeping the cam position at the initial point by turning off the clutch motor when the drive time reaches the set time; The seventh step of turning off the clutch motor if the switch is not switched on even after the set time is exceeded, and the eighth step of performing the restraining operation by inverting the BLDC motor for a predetermined period of time for a predetermined time after performing the seventh step. And the ninth step of checking the number of times of the restraint operation of the BLDC motor, and if the number of times of the restraint operation of the BLDC motor is less than the set number of execution times as a result of the check in the ninth step, turn on the clutch motor again. A tenth step of carrying out the first step of driving the motor; and an eleventh step of displaying an error and stopping the washing machine when the check result of the ninth step reaches the Clutch motor control method of a full automatic washing machine characterized in that it comprises a. The method of claim 1, After completion of water supply, the time required for the clutch motor to be turned on and the internal switch of the clutch motor to be switched to the on state can be commonly applied when the frequency of the rated voltage applied to the clutch motor is 50 Hz or 60 Hz. Clutch motor control method of a fully automatic washing machine, characterized in that set within 5 seconds so that. The method of claim 2, For switching to the dehydration mode, the time required for the clutch motor to be turned on and the internal switch of the clutch motor to be switched off is when the frequency of the rated voltage applied to the clutch motor is 50 kHz or 60 kHz. Clutch motor control method of a full-automatic washing machine, characterized in that set within 7 seconds to be applied in common.