KR20050060678A - Exchange lever in full automation-type washing machine - Google Patents

Abstract

The present invention is to heat the power transmission path switching lever of the washing machine driving motor to modify the surface of the switching lever to reduce the wear of the contact portion of the switching lever and the sliding coupler.

To this end, the present invention and the washing tank rotatably installed in the outer tank; A pulsator rotatably installed in the washing tank; De-shrinkage for transmitting the rotational power of the washing machine driving motor to the washing tank; A washing shaft installed inside the deshrinking shaft and transmitting a rotational power of the washing machine driving motor to the pulsator; A rotor assembly and a stator assembly constituting the washing machine driving motor; A clutch housing coupled to the lower portion of the outer tank; A stopper fixed to the lower end of the clutch housing; A rotor bushing coupled to the lower end of the washing shaft so that the rotational force of the rotor is transmitted to the washing shaft and having a bushing protrusion to which the lower protrusion of the sliding coupler fits; A clutch motor installed at a lower side of the outer tank; A cam coupled to the drive shaft of the clutch motor; A sliding coupler for switching the rotational power transmission path of the washing machine driving motor to the deshrink or washing shaft while moving up and down along the deshrinkage direction; Receives the power of the clutch motor through the link link assembly to move the sliding coupler up and down directly, the surface of the carburizing treatment, carburizing nitriding treatment or nitriding carbonization switch; configured to include a washing stroke or dehydration stroke Correspondingly, the power transmission path of the washing machine driving motor may be switched to a washing shaft or a dewatering shaft.

Description

Fully automatic washing machine {exchange lever 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 surface modification of a switching lever constituting a clutch mechanism of a motor direct type washing machine.

In general, a fully automatic washing machine is a product that removes contaminants such as clothing and bedding by using friction and impact of water flow due to emulsification of detergent and rotation of washing blades. Automatically set the water, water to the appropriate level according to the amount and type of laundry, and then wash the microprocessor control.

Hereinafter, a clutch mechanism structure of a conventional direct type washing machine will be described with reference to FIGS. 1 to 3.

1 is a schematic view of a conventional direct-type automatic washing machine, the outer tank (1) for storing the wash water is installed inside the outer case forming the appearance of the washing machine.

2A and 2B are main part longitudinal cross-sectional views showing the configuration of an embodiment of a conventional washing machine driving device, and FIG. 3 is an exploded perspective view of the main part of FIG. 2B, wherein the tub 1 for both washing and dehydration is used inside the outer tub 1. ) Is installed.

On the other hand, the dehydration shaft 100 for rotating the washing tank 2 is directly connected to the washing tank, the dehydration shaft is connected to the upper dehydration shaft 120 for rotating the washing tank, the upper dehydration shaft 120 and on the lower inner peripheral surface A cylindrical drum 160 with teeth formed thereon, and a lower dehydration shaft 140 connected to the lower end of the drum 160 to transmit the rotational force of the motor to the upper dehydration shaft 120.

The upper washing shaft 210 and the lower washing shaft 240 penetrate the inside of the dehydration shaft 100, and the laundry is fixed at the upper end of the upper washing shaft 210 penetrating the bottom surface of the washing tank. , Washing wing 3 for rotating in the reverse direction is installed.

In order to support the rotation of the upper dehydration shaft 120, an oilless bearing 180 is installed between the upper dehydration shaft 120 and the upper washing shaft 210. Here, in the oilless bearing, when the upper washing shaft 210 rotates inside the upper dehydrating shaft 120, if heat is generated by friction, the oil impregnated therein is the upper washing shaft 210 and the upper dehydrating shaft 120. It acts to keep the rotation smoothly out of between.

In addition, a plurality of planetary gears 220, one sun gear 242, and a carrier are provided in the drum 160 to reduce the rotational speed of the motor while transmitting power of the motor to the upper washing shaft 210 during washing. A deceleration means composed of 230 is provided.

On the other hand, the lower washing shaft 240 is coupled to the inside of the lower dehydration shaft 140 for transmitting the power of the motor to the planetary gear 220. In addition, a sun gear 242 is formed at an upper end of the lower washing shaft 240 to mesh with the planetary gear 220 to transmit power of the lower washing shaft 240 to the planetary gear 220.

During washing, the power generated by the motor is transmitted in the order of the sun gear 242, the planetary gear 220, the carrier 230, and the upper washing shaft 210 via the lower washing shaft 240. That is, the planetary gear 220 rotates in engagement with a sun gear 242 to be described later between carriers 230 that support the upper and lower portions of the shaft 222 during washing.

On the other hand, since the planetary gear 220 and the drum 160 rotates at the same time during dehydration, the planetary gear 220 revolves around the sun gear 242.

In addition, a lower portion of the upper dehydration shaft 120, a drum 160, and a clutch housing 300 for surrounding and protecting the upper portion of the lower dehydration shaft 140 are provided.

The clutch housing includes an upper clutch housing 300a and a lower clutch housing 300b, and the upper and lower clutch housings 300a and 300b are fastened to each other by bolts. Upper and lower bearings 330 and 340 supporting the upper and lower desorption shafts 120 and 140 are interposed at the upper end and the lower end of the clutch housing 300, respectively.

Meanwhile, the stopper 660 and the stator assembly 400 which will be described later are fastened to the lower end of the clutch housing 300 by bolts 662.

In addition, a brake assembly 700 for selectively restraining the rotation of the drum 160 is provided for the case where only the washing shaft 200 should be rotated during washing and when the dehydration should be stopped at the moment of dehydration.

At this time, the brake assembly 700 is connected to the brake lever 720 and the upper clutch housing 300a, the brake lever 720, and the lower clutch housing 300b interlocked with the drain valve (not shown). The through shaft 740, which is coupled to the through shaft 740 and connected to the brake spring 760, the brake lever 720 for giving the elasticity of the brake lever 720, for applying the brake of the drum 160 The brake pad 780 is configured to include a brake hinge shaft 790 coupled to an end of the brake pad 780 and hinged when the brake lever 720 is pressed.

The motor for generating the rotational force of the dehydration shaft 100 and the washing shaft 200 includes a rotor assembly 500 which is a rotor directly connected to the lower washing shaft 240, and a lower end of the clutch housing 300. It is configured to include a stator assembly 400 is a stator coupled to generate a rotating magnetic field.

On the other hand, one side of the drive unit is provided with a clutch assembly for switching the power transmitted to the dehydration shaft 100 or the washing shaft 200.

In this case, the clutch assembly includes a clutch motor 600 providing power of a clutch motion, a link link assembly 630 for converting the rotational motion of the clutch motor 600 into a linear motion, and the link link assembly ( A switching lever 640 that rotates about a hinge axis by a linear motion of the shaft 630, and a rotor bushing 535 and a lower washing which are positioned at the top of the coupler support part 640b of the switching lever 640 and positioned at the center of the rotor assembly. Including a sliding coupler 650 for sliding the outer circumferential surface of the shaft 240, and a stopper 660 coupled to the upper protrusion 652 formed on the sliding coupler 650 to prevent rotation of the lower dehydration shaft 140 It is composed.

The link link assembly 630 includes a motor connection part 630a connected to one side of the clutch motor 600, a link body part 630b integrally formed with the motor connection part 630a, and the link body. A link case 630c surrounding the portion 630b, a spring coupling portion 630d formed at one side of the link case 630c and hinged to the switching lever 640, and an outer peripheral surface of the link body portion 630b. It is configured to include a spring (630e) coupled to generate elasticity. An end of the link body portion 630b is integrally formed with a stepped jaw to have a spring 630e. It does not come out of the link body portion 630b.

And, the switching lever 640 (640a, 640b) is in the form of "b", including a lever body portion 640a connected to the connecting link 630, and a coupler support portion 640b on which the sliding coupler 650 is placed. Is formed. One end of the lever body portion 640a is hinged rotatably with the spring fastening portion 630d of the link case 630c, and the other end on which the hinge protrusion 660c is formed is a lever guide formed at one side of the stopper 660. It is hinged to the stopper hinge ball of 660d.

The coupler support part 640b extends substantially perpendicular to the lever body part 640a and is formed in a “U” shape. The sliding coupler 650 is stably placed on an upper surface of the coupler support part 640b having a “U” shape. A protrusion 640b-1 for supporting the spring 660e inserted into the spring support 660f of the stopper 660, which will be described later, is formed at one side of the coupler support 640b.

The sliding coupler 650 has a cylindrical shape and a serration in the axial direction is formed on the inner circumferential surface thereof, and is engaged with the serration formed on the outer circumferential surface of the lower dehydration shaft 140 and the rotor bushing 535. In addition, an upper protrusion 652 coupled to the gear coupling hole 660b formed at the lower end of the stopper 660 is formed at the upper end thereof.

In addition, a coupler spring 651 is provided at an upper portion of the sliding coupler 650 to press the sliding coupler 650 downward. A circular groove corresponding to the diameter of the coupler spring 651 is formed on the sliding coupler 650, and a portion of the coupler spring 651 is inserted. Also, the other end of the inserted coupler spring 651 contacts the lower bearing 340.

In addition, the sliding coupler 650 is the first position (lower position, that is, the dehydration position) and the lower dehydration shaft simultaneously engaged with the serration of the bushing protrusion 535c and the lower dehydration shaft 140 of the rotor bushing 535, Up and down sliding to the second position (upper position, that is, the washing position) that is engaged only with the serration of 140 is possible.

The coupler spring 651 is compressed at a second position (upper position) in which the sliding coupler 650 is engaged only with the lower dehydration shaft 140, and the sliding coupler 650 is subjected to a downward pressure. In this case, since the sliding coupler 650 is supported by the coupler support part 640b, the sliding coupler 650 is stopped at the upper position.

However, in the first position, the sliding coupler 650 is pressed down by the elastic restoring force of the coupler spring 651 to stay in the lower position.

The stopper 660 is formed on the side of the stopper fastening hole 660a and the stopper fastening hole 660a for screwing the clutch assembly to the lower clutch housing 300b. A lever guide 660d supporting the gear coupling hole 660b coupled to the protrusion 652 and the lever body portion 640a and having a stopper hinge hole to which the hinge protrusion 660c of the switching lever is rotatably coupled, is provided. And a spring 660e for giving elasticity to the coupler support 640b and a spring support 660f for supporting the spring 660e when the lever 640 rotates to the dewatered position. The stopper 660 is coupled to the lower portion of the lower clutch housing 300b by a bolt 662 and fixed to the clutch housing 300.

In addition, the spring 660e to maintain a constant interval without contact between the sliding coupler 650 and the coupler support portion 640b during dehydration, and when the washing lever of the switching lever 640 by the vibration generated from the drive unit Prevent vibration

On the other hand, when the coupler support portion 640b and the sliding coupler 650 have to maintain a constant interval as described above, looks at the reason that the laundry is dewatered.

As the washing shaft 210 coupled to the rotor bushing 535 rotates at high speed, the lower dehydration shaft 140 coupled by the sliding coupler 650 also rotates at high speed, and thus the lower dehydration shaft 140 is rotated. Combined with the washing tub 20 is also rotated at high speed.

However, since the sliding coupler 650 rotates at a high speed in a state where the sliding coupler 650 is placed on the upper portion of the coupler support 640b, the sliding coupler 650, which is weaker than the coupler support 640b, is easily worn.

As described above, in order to prevent wear of the sliding coupler 650, the sliding coupler 650 and the coupler support part 640b should be prevented during dehydration, and the spring 660e serves to prevent contact as described above. do.

Hereinafter, the operation of the clutch assembly will be described with reference to FIGS. 2A and 2B.

2A illustrates a washing state in which the sliding coupler 650 is engaged only with the lower dehydration shaft 140, and the link link assembly 630, the switching lever 640, the sliding coupler 650, and the stopper 660 in the second position. Indicates the state.

2B illustrates a dehydration state in which the sliding coupler 650 is simultaneously engaged with the lower dehydration shaft 140 and the rotor bushing 535, and the link link assembly 630 and the switching lever 640 in the first position are slid. The coupler 650 and the stopper 660 are shown.

2B to 2A, that is, a process of moving the sliding coupler 650 to an upper portion will be described.

First, the clutch motor 600 is rotated under control by a microprocessor. The link link 630 is pulled toward the clutch motor 600 by the rotational movement of the clutch motor 600. In addition, by the movement of the connecting link 630, the switching lever 640 is inclined toward the clutch motor 600, the upper end of the lever body portion 640a around the stopper hinge ball.

And by the inclination of the lever body portion 640a, the coupler support portion 640b is inclined so that the end portion thereof faces the lower end of the stopper 660.

At this time, the sliding coupler 650 lying on the upper end of the coupler support part 640b slides upward on the serration formed on the lower outer circumferential surface of the lower dehydration shaft 140 to be positioned at the second position. The upper protrusion 652 formed in the sliding coupler 650 by the sliding is engaged with the gear coupling hole 660b of the stopper 650.

On the other hand, looks at the action of the spring (630e) formed in the connection link (630). The spring 630e is inserted between one side wall of the link body portion 630b and the projection of the spring fastening portion 630c to form elasticity in the switching lever 640 to maintain a smooth operation of the sliding coupler 650. It is for. When sliding the sliding coupler 650 up and down, it is difficult for the gear coupling hole 660b of the stopper 660 coupled with the upper protrusion 652 of the sliding coupler 650 to meet each other and to be coupled accurately. So, in consideration of this in the design of the washing machine is designed to rotate the motor finely to the left and right when the sliding coupler 650 vertical operation.

As described above, the gear coupling hole 660b of the stopper 660 coupled with the upper protrusion 652 of the sliding coupler 650 may be momentarily engaged when the motor rotates left and right. And at this time, if the sliding coupler 650 is receiving the force to be slid upward with elasticity, the engagement can be made even more smoothly. The spring 630e is fastened inside the connection link 630 in order to maintain elasticity when sliding the upper coupler 650 as described above.

On the other hand, with reference to Figures 1 to 3 will be described the operation during washing and dehydration of the drive device.

As shown in Figure 2a during the washing by the operation of the clutch motor 600, the switching lever 640 is rotated in the counterclockwise direction on the drawing about the hinge point. In addition, the coupler support part 640b is moved by the switching lever 640 in the rotational position so that the sliding coupler 650 is engaged with only the lower dehydration shaft 240 so as to move upward.

Then, when power is applied to the washing machine driving motor, the rotor assembly 500 rotates around the stator assembly 400 around the lower washing shaft 240.

Looking at the rotational force transmission process in this case, the rotational force by the rotation of the rotor assembly 500, the rotor bushing 535 of the rotor frame 530, the lower washing shaft 240 coupled to the rotor bushing 535, planetary It is transmitted to the gear 220, the carrier 230, the upper washing shaft 210.

At this time, the dehydration shaft 100 is constrained by the sliding coupler 600 that the lower dehydration shaft 240 is engaged with the stopper 660, it can not rotate.

On the other hand, since the planetary gear 220 is constrained by the brake assembly 700 when the drum 160 of the dehydration shaft 100 is washed, the planetary gear 220 is disposed in the opposite direction to the sun gear 242 formed at the upper end of the lower washing shaft 240. At the same time, the rotation around the drum 160 in the same direction as the sun gear 242. As the planetary gear 242 revolves as described above, the upper washing shaft 210 connected to the carrier 230 rotates inside the upper dehydration shaft 120.

As shown in FIG. 2B, the lever body 640a of the switching lever 640 is vertical by driving the clutch motor 600, and the coupler support 640b lowers the sliding coupler 650. It is moved downward to engage (first position) with the bushing protrusion 535c of the dehydration shaft 240 and the rotor bushing 535 at the same time. That is, the upper protrusion 652 of the sliding coupler 650 is separated from the gear coupling hole 660b of the stopper 660 and the sliding coupler 650 is lowered by the self-weight and the pushing force of the coupler spring 651.

Looking at the rotational force transmission process at this time, the rotational force of the rotor assembly 500, the rotor bushing 535, the lower washing shaft 240, the planetary gear 220, the upper washing shaft 210 of the rotor frame 530 Is passed to.

That is, during dehydration, since the sliding coupler 650 is engaged with the rotor bushing 535 and the lower dehydration shaft 140 at the same time, the rotational force transmitted to the lower washing shaft 240 is the lower dehydration shaft 140 and the drum 160. It is delivered to the upper dehydration shaft 120 through, so that the washing shaft 200 and the dehydration shaft 100 is rotated at the same speed at the same time.

On the other hand, the planetary gear 220 does not rotate because the drum 160 of the dehydration shaft 100 rotates at the same speed as the lower washing shaft 240, but the drum 160 is in the same direction as the sun gear 242. Revolve together.

However, such a conventional washing machine has the following problems.

First, since the sliding coupler 650 rotates in a state where it is placed at the end of the switching lever, wear occurs at the contact portion between the coupler support part 640b and the sliding coupler 650.

That is, at the time of washing, the connecting spring 67b of the connecting portion 67 having a smaller elasticity than the spring 66c is pulling the upper portion of the switching lever 640 in the direction of the lever operating motor 68, so that the sliding coupler 650 and the coupler Contact of the support portion 640b cannot be prevented.

Therefore, as the washing machine is used for a long time, wear of the coupler support part 640b of the switching lever 640 and the sliding coupler 650 in contact therewith proceeds easily.

The present invention is to solve the above problems, by heat-treating the switching lever for switching the power transmission path of the washing machine driving motor to modify the surface of the switching lever to reduce the contact wear of the switching lever and the sliding coupler. The purpose is to make it possible.

The present invention for achieving the above object, the washing tank rotatably installed in the outer tank; A pulsator installed in the tub and rotatable independently of the tub; De-shrinkage for transmitting the rotational power of the washing machine driving motor to the washing tank; A washing shaft installed inside the dewatering shaft and transmitting a rotational power of the washing machine driving motor to a pulsator; A rotor assembly and a stator assembly constituting the washing machine driving motor; A clutch housing coupled to a lower portion of the outer tank; A stopper fixed to the lower end of the clutch housing; A rotor bushing coupled to the lower end of the washing shaft so that the rotational force of the rotor is transmitted to the washing shaft and having a bushing protrusion to which the lower protrusion of the sliding coupler is fitted; A clutch motor installed at a lower side of the outer tank; A cam coupled to the drive shaft of the clutch motor; A sliding coupler which moves up and down along the de-shrinkage direction and switches the rotational power transmission path of the washing machine driving motor to the de-shrinkage or washing shaft; A switching lever of receiving the power of the clutch motor through a link link assembly to move the sliding coupler up and down directly, the surface of which is carburized or carburized or carburized; And a link link assembly provided between the clutch motor and the switching lever to transfer the driving force of the clutch motor to the sliding coupler through the switching lever. The power transmission of the washing machine driving motor corresponds to the washing stroke or the dehydrating stroke. A fully automatic washing machine is provided, wherein the path is switchable to a washing shaft or a deshrinkable shaft.

On the other hand, according to another aspect of the invention, the washing tank rotatably installed in the outer tank; A pulsator installed in the tub and rotatable independently of the tub; De-shrinkage for transmitting the rotational power of the washing machine driving motor to the washing tank; A washing shaft installed inside the dewatering shaft and transmitting a rotational power of the washing machine driving motor to a pulsator; A rotor assembly and a stator assembly constituting the washing machine driving motor; A clutch motor installed at a lower side of the outer tank; A sliding coupler which moves up and down along the de-shrinkage direction and switches the rotational power transmission path of the washing machine driving motor to the de-shrinkage or washing shaft; Receives the power of the clutch motor through the link link assembly to move the sliding coupler up and down directly, the surface is NICO-BF-treated switching lever; configured to include, to drive the washing machine in response to the washing stroke or dehydration stroke A fully automatic washing machine is provided, wherein the power transmission path of the motor is switchable to a washing shaft or a dewatering shaft.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to FIGS. 1 to 4 as follows.

First, the present invention transfers the rotational power of the washing machine driving motor to the washing tank 2, the pulsator (3) rotatably installed in the washing tank 2, and the washing tank rotatably installed in the outer tank (1) Dehydration shaft 100 and the washing shaft 200 which is installed inside the dehydration shaft to transfer the rotational power of the washing machine driving motor to the pulsator, the rotor assembly 500 constituting the washing machine driving motor and Stator assembly 400, the clutch housing 300 is coupled to the lower portion of the outer tub (1), the stopper 660 fixed to the lower end of the clutch housing 300, and the rotor coupled to the lower end of the washing shaft 200 Rotor bushing 535 for transmitting the rotational force of the washing shaft, a clutch motor 600 installed on the lower side of the outer tub 1, a cam 620 coupled to the drive shaft of the clutch motor, and the dehydration shaft ( Rotation of the washing machine driving motor The sliding coupler 650 for switching the power transmission path to the dehydration shaft 100 or the washing shaft 200 and the sliding coupler 650 directly move up and down while rotating by receiving the power of the clutch motor 600. A connecting link provided between the clutch motor 600 and the switching lever 640 to transfer the driving force of the switching lever 640 and the clutch motor 600 to the sliding coupler 650 through the switching lever 640. It is configured to include an assembly 630, characterized in that the surface of the switching lever 640 is carburized, carburized nitriding or carburized carbonization (浸 窒 炭化 處理).

On the other hand, carburizing treatment is to put the switching lever 640 inside the furnace, and drive the rotational speed (rpm) of the blowing fan to the lowest 300 top 1500 while maintaining the temperature in the furnace 910 ~ 930 ℃ Let's do it. The blowing angle of the blowing fan is adjusted to 45 degrees, and methanol, toluene, benzene, methyl alcohol, nitrogen, and propane are added gases. And the ratio supplied from the upper and lower parts of the heating furnace is 1: 3 while supplying and spraying the workpiece to the heat treatment. Through this process, a switching lever 640 having a carburized layer having a depth of about 0.5 to 0.6 mm having a white surface color can be obtained within about 1 hour.

In the carburizing and nitriding treatment, as in the carburizing treatment, the rotational speed and the spraying angle of the blowing fan are the same, but the temperature in the furnace is maintained at 850 to 920 ° C. Heat treatment while supplying and spraying the workpiece at a ratio of 1: 3 at a ratio of 97 to 70 wt% of mixed gas and 3 to 30 wt% of ammonia gas at a ratio of 1: 4 to the workpiece. Through this process, a switching lever 640 having a carburized nitride layer can be obtained with a depth of 0.3-0.6 mm having a gray surface color within about 1 hour.

In the carburizing process, the rotation speed and the spraying angle of the blowing fan are the same as in the carburizing process, but the temperature in the heating furnace is maintained at 550 to 780 ° C. And 5-10 wt% ammonia of carbon dioxide, which is injected into the workpiece at a ratio of 70 to 60 wt% of mixed gas of methanol and nitrogen as an additive gas at a ratio of 30 to 40 wt% of ammonia gas as needed. 30 to 40 wt% of gas and 65 to 50 wt% of nitrogen are supplied and injected into the workpiece at a ratio of 1: 3 supplied from the upper and lower portions of the furnace. Through this process it is possible to obtain a switching lever 640 in which an acicular carbonization layer having a depth of 15 to 50 mm and a depth of 30 to 300 mm is formed within about 1 hour. The surface color of the switching lever 640 at this time is grayish white.

The switching lever 640 of the present invention is thus heat-treated to increase the hardness and to improve wear resistance and perturbation resistance, thereby reducing contact wear with the sliding coupler 650.

On the other hand, according to another embodiment of the invention, the switching lever 640, NICO-BF process (Ni trogen, C arbon and O xygen the surface of Compound layer containing blue (B lue), black (B lack) and white (B right) finishing in the color of (F inish) refers to a new process in which a surface modification technology, by combining the initial pro-underlined words in the above description be subjected to is referred to as NICO-BF).

This NICO-BF treatment is a well-known new complex surface modification heat treatment technology of plating elimination, pollution-free, and breakthrough cost saving type, and this treatment enables corrosion resistance, abrasion resistance, perturbation, weight reduction due to improved strength, and aesthetic characteristics. Do.

That is, in corrosion resistance, the surface treatment of zinc plating, electroless Ni plating, dark treatment, painting, etc., or the corrosion resistance of stainless steel is replaced (5% NSST: 300hr or more), and after hard chromium plating or high frequency surface hardening treatment, Replace chromium plating (5% NSST: 500hr or more).

In addition, the wear resistance and the perturbation resistance can be improved by the surface compound layer of Hv550-1200, the Fe3O4 film, and the oil content.

In addition, in the weight reduction due to the improvement in strength, the fatigue strength improvement of 3 to 5 times and the formation of diffusion layer by the nitrogen solubility of 0.4 to 0.8 mm and the formation of ε-nitride by the enrichment of high nitrogen concentration in the surface layer were increased by 2 to 5 times. The tensile strength can be improved, the weight, size and thickness can be reduced.

As aesthetic characteristics, black, white, and blue surface colors are obtained regardless of the surface conditions by machining, cold rolling, hot rolling, and the like, and in particular, the decorative properties are excellent.

This NICO-BF treatment is a pollution-free process, and is a gas-type low temperature (500 to 650 ° C.) treatment that replaces salt bath nitriding, and can eliminate pollution problems such as sludge removal and waste water treatment by plating.

In addition, it is possible to save energy because it is possible to produce 2-3 times as more than three times the production efficiency and one-third the energy compared to carburizing nitriding in one treatment compared to gas soft nitriding by all types of furnaces.

Even in this case, the switching lever 640 of the present invention can reduce the wear of the contact portion with the sliding coupler 650 because the surface is heat-treated to improve wear resistance and perturbation resistance.

As described above, the technical gist of the present invention is to change the structure by heat-treating the switching lever 640 to prevent wear of the sliding coupler 650.

On the other hand, the present invention, within the scope of the basic technical idea, many changes and modifications are possible to those skilled in the art of course.

According to the present invention as described above it is possible to effectively prevent the contact portion of the switching lever and the sliding coupler for switching the power transmission path of the washing machine driving motor.

That is, the present invention heat treatment of the power transmission path switching lever of the drive motor for the washing machine, by modifying the surface of the switching lever can reduce the wear of the contact portion of the switching lever and the sliding coupler, product life and reliability Improvement can be aimed at.

1 is a schematic diagram of a conventional direct-type automatic washing machine

2a and 2b is a longitudinal sectional view showing the structure of the clutch mechanism of the automatic washing machine according to the prior art,

2A is a state diagram at the time of washing

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

3 is an exploded perspective view of main parts of FIG. 2;

4 is a perspective view of the switching lever

* Description of the symbols for the main parts of the drawings *

100 ..... dehydration 200 ..... laundry shaft

300 ..... Clutch housing 535 ..... Rotor bushing

535c ..... Bushing protrusion 630 ..... Link link assembly

640 ..... selector lever 650 ..... sliding coupler

660d ..... Lever Guide 700 ..... Brake Assembly

K ..... step

Claims (5)

A washing tank rotatably installed in the outer tank; A pulsator installed in the tub and rotatable independently of the tub; De-shrinkage for transmitting the rotational power of the washing machine driving motor to the washing tank; A washing shaft installed inside the dewatering shaft and transmitting a rotational power of the washing machine driving motor to a pulsator; A rotor assembly and a stator assembly constituting the washing machine driving motor; A clutch housing coupled to a lower portion of the outer tank; A stopper fixed to the lower end of the clutch housing; A rotor bushing coupled to the lower end of the washing shaft so that the rotational force of the rotor is transmitted to the washing shaft and having a bushing protrusion to which the lower protrusion of the sliding coupler is fitted; A clutch motor installed at a lower side of the outer tank; A cam coupled to the drive shaft of the clutch motor; A sliding coupler which moves up and down along the de-shrinkage direction and switches the rotational power transmission path of the washing machine driving motor to the de-shrinkage or washing shaft; It is configured to include; a switching lever which is directly moved up and down the sliding coupler by receiving the power of the clutch motor, the surface of which has undergone any heat treatment process of carburizing treatment, carburizing nitriding treatment or nitriding carbonization treatment, The automatic washing machine characterized in that the power transmission path of the washing machine driving motor can be switched to the washing shaft or dewatering shaft in response to the washing stroke or the dehydrating stroke. The method of claim 1, The switching lever drives the rotational speed (rpm) of the blowing fan to at least 300 top 1500 while maintaining the temperature in the heating furnace at a temperature of 910 to 930 ° C. while the switching lever is put into the heating furnace. Adjust the blowing angle of the blowing fan to 45 degrees, and add methanol, toluene, benzene, methyl alcohol, nitrogen, propane as an additive gas, Fully automatic washing machine characterized in that the carburizing treatment by supplying a ratio of 1: 3 supplied from the upper and lower parts of the heating furnace. The method of claim 1, The switching lever is With the switching lever inside the furnace, drive the rotational speed (rpm) of the blowing fan to the lowest 300, the highest 1500, and adjust the blowing angle of the blowing fan to 45 degrees, Maintain the temperature in the furnace at 850-920 ° C, Carburizing by supplying and spraying a 1: 3 ratio of gas supplied from the upper and lower parts of the furnace at a magnification ratio of 97 to 70 wt% of mixed gas of methanol and nitrogen as an additive gas and 3 to 30 wt% of ammonia gas Fully automatic washing machine characterized in that the nitriding treatment. The method of claim 1, The switching lever is With the switching lever inside the furnace, drive the rotational speed (rpm) of the blowing fan to the lowest 300, the highest 1500, and adjust the blowing angle of the blowing fan to 45 degrees, The temperature in the furnace is maintained at 550 ~ 780 ℃, 5 ~ 10wt% ammonia gas, which is sprayed to the workpiece at the ratio of 70 ~ 60wt% mixed gas of methanol and nitrogen as the additive gas at 6: 4wt% and 30 ~ 40wt% of ammonia gas as needed 30 to 40 wt% and nitrogen to 65 to 50 wt%, the automatic washing machine, characterized in that the carbonization treatment by the nitriding by supply spraying at a ratio 1: 3 supplied from the top and bottom of the furnace. A washing tank rotatably installed in the outer tank; A pulsator installed in the tub and rotatable independently of the tub; De-shrinkage for transmitting the rotational power of the washing machine driving motor to the washing tank; A washing shaft installed inside the dewatering shaft and transmitting a rotational power of the washing machine driving motor to a pulsator; A rotor assembly and a stator assembly constituting the washing machine driving motor; A clutch motor installed at a lower side of the outer tank; A sliding coupler which moves up and down along the de-shrinkage direction and switches the rotational power transmission path of the washing machine driving motor to the de-shrinkage or washing shaft; Receives the power of the clutch motor through the link link assembly to move the sliding coupler up and down directly, the surface is NICO-BF-treated switching lever; configured to include, to drive the washing machine in response to the washing stroke or dehydration stroke Fully automatic washing machine characterized in that the power transmission path of the motor for switching to the laundry shaft or dewatering.