KR20040013279A - Structure for assembling pulsator in washing machine - Google Patents

Abstract

PURPOSE: Assembling structure of a pulsator for a washing machine is provided to prevent noise by restricting an outer pulsator and an inner pulsator from moving to each other with modifying the assembling structure of the pulsator. CONSTITUTION: A pulsator of a washing machine is composed of an outer pulsator(4b) made of stainless steel and composed of plural protruded washing blades(400b); an inner pulsator(4a) fixed in the outer pulsator, made of plastic material and composed of plural washing blades(400a) combined with the washing blades of the outer pulsator; and protruded parts(410a) placed outside the washing blades of the inner pulsator and inside the washing blades of the outer pulsator. Displacement between the inner pulsator and the outer pulsator is restricted by contacting the protruded parts of the washing blades of the inner pulsator to the washing blades of the outer pulsator. Thus, collision noise is prevented in rotating the pulsator during washing or rinsing.

Description

Structure for assembling pulsator in washing machine

The present invention relates to a washing machine, and more particularly to a pulsator assembly structure of the washing machine.

In general, a washing machine is a household appliance that allows laundry to be washed due to the flow of the washing water caused by forced flow of the supplied washing water, friction and emulsification of the detergent, and the like, and the amount and type of the laundry is detected by a sensor. 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 laundry, and then washing is performed under the control of the microcomputer. Is done.

In addition, the driving method of the conventional fully automatic washing machine is a method of rotating the dehydration tank by transmitting the rotational power of the drive motor to the washing shaft through the power transmission belt and pulley to rotate the pulsator or to the dehydration shaft, By controlling the speed of the BLDC motor, there is a method of rotating the washing tank and the dehydration tank at different speeds during washing and dehydration.

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 simultaneously rotated at high speed to dehydrate.

The present invention relates to a pulsator, which is applied to a washing machine which rotates a pulsator during washing to perform washing, and at the same time, spins the pulsator and a dehydration tank at a high speed to perform washing. Briefly described as follows.

As shown in Fig. 1 and 2, a cylindrical outer tub (2) for storing the wash water for washing is fixed inside the outer case (1) forming the outer shape of the washing machine, the laundry inside the tub (2) The washing tank 3 is rotatably installed, and a pulsator 4 having a washing wing to force the washing water stored in the washing tank 3 and the outer tank 2 to the bottom of the washing tank 3 is provided. It is rotatably installed.

In addition, the lower side of the outer tank (2) selectively transfers the driving force of the motor and the motor which is a driving means for rotating the pulsator (4) or the washing tank (3) to the washing shaft (5) or dewatering shaft (6) The drive part 7 which consists of a power switching mechanism which rotates the pulsator 4 or the washing tank 3 is provided.

And, one side of the drive unit 7 is provided with an actuator 8 for operating the power switching mechanism.

Therefore, when the user applies power to the washing machine and selects a washing method suitable for the type of laundry, the washing machine senses the weight of the laundry under the control of the microcomputer (not shown), and the water level and time appropriate thereto. By setting the washing, rinsing, dehydration, water supply / drainage process proceeds in a predetermined order.

In the washing and rinsing process, the rotational force generated by the motor 5 by the action of the power switching mechanism is transmitted only to the pulsator 4 connected to the washing shaft 5, and thus the bottom surface of the washing tank 3. The pulsator (4) is installed in the washing and rinsing of the laundry is generated by the flow of the washing water while the stirring rotation in the forward and reverse directions.

At the time of dehydration, the rotational force generated by the motor is simultaneously transmitted to the washing shaft 5 and the dewatering shaft 6 so that the pulsator 4 and the washing tank 3 rotate at the same time at high speed, thereby dehydrating by centrifugal force. .

On the other hand, the conventional structure of the pulsator (4), which serves to form the washing water flow while stirring and rotating in the forward and reverse direction under the driving force of the motor, as shown in Figs. A plurality of washing wings are formed, and a plurality of drainage holes are formed in the area therebetween, and a lower surface of the pumping rib is formed to impart centrifugal force to the washing water.

In general, the pulsator 4 is generally made of a plastic injection molding, or recently, an inner pulsator 4a (inner pulsator) made of plastic injection molding as shown in FIG. 3 due to strength and aesthetic demand. In the present invention, an outer pulsator 4b (outer pulsator) made of metal, such as stainless steel, is covered on the top surface of the outer pulsator.

In other words, the inner side of the plastic material having washing blades 400a formed in the outer surface of the outer pulsator 4b of the metal material having a plurality of washing blades 400b protruding from the upper surface of the outer pulsator. Fix the pulsator 4a.

On the other hand, in the center of the upper surface of the pulsator (4) to cover the fastening member to be fastened to the upper end of the washing shaft (5) through the central portion, while the gap between the outer pulsator (4b) and the inner pulsator (4a) The cover cap is installed to prevent the phenomenon that the washing water is introduced and foreign matters are caught therebetween.

That is, since the pulsator 4 of the conventional structure described above is an assembly obtained by overlaying the outer pulsator 4b made of stainless steel on the inner pulsator 4a, which is a plastic injection molding, there is a gap between the two parts. If there is no cover cap, foreign materials such as seams are easily accumulated in the gap, so the cover cap is essential.

However, the conventional pulsator 4, which is an assembly of the inner pulsator 4a made of plastic injection molding and the outer pulsator 4b made of stainless steel, has the following structural limitations.

That is, as shown in Fig. 3, the conventional pulsator 4, which is an assembly of the inner pulsator 4a and the outer pulsator 4b, is assembled between the inner pulsator 4a and the outer pulsator 4b. Due to the tolerance, a flow occurs between the inner pulsator 4a and the outer pulsator 4b, and thus the inner pulsator 4a and the outer pulsator 4b during stirring rotation for washing and rinsing. There was a problem such as noise generated by the collision between the).

The present invention has been made to overcome the structural limitations of the conventional pulsator as described above, by improving the existing structure of the washing machine pulsator composed of the inner pulsator and the outer pulsator to flow between the outer pulsator and the inner pulsator and this It is an object of the present invention to provide a washing machine pulsator that can be prevented due to noise.

1 is a structural example of a washing machine according to the present invention, a schematic longitudinal sectional view of a general motor direct drive type washing machine;

FIG. 2 is an external perspective view illustrating a conventional pulsator structure of FIG. 1

3 is a cross-sectional view taken along the line II of FIG. 2.

4 is a perspective view of a pulsator of the present invention

5 is a cross-sectional view taken along the line II-II of FIG. 4.

* Description of the main parts of the drawings

1: Outcase 2: Outer

3: washing tank 4: pulsator

4a: inner pulsator 4b: outer pulsator

400a: washing blade of the inner pulsator

400b: washing blade of the outer pulsator

410a: protrusion 5: washing shaft

6: dehydration 7: drive unit

8: Actuator

In order to achieve the above object, the present invention, the outer pulsator of the metal material formed with a plurality of washing wings protruding on the upper surface, and the washing wing is fixed to the inner pulsator and each of the washing wings of the outer pulsator In the pulsator of the washing machine comprising an inner pulsator of the plastic material is formed; At least one protrusion is formed on the outer surface of each washing wing of the inner pulsator to be in contact with the inner surface of each washing wing of the outer pulsator.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a perspective view of the pulsator of the present invention, Figure 5 is a cross-sectional view along the line II-II of Figure 4, the present invention is a metallic outer pulsator (4b) with a plurality of washing blades 400b protruded on the upper surface And an inner pulsator (4a) made of a plastic material, which is fixed inside the outer pulsator (4b) and has a washing blade (400a) that is fitted with each of the washing blades (400b) of the outer pulsator. In the eater 4; At least one protrusion 410a is formed on the outer surface of each of the washing blades 400a of the inner pulsator 4a to be in contact with the inner surface of each of the washing blades 400b of the outer pulsator 4b.

At this time, the outer pulsator 4b is made of stainless steel.

At this time, the protrusion 410a is formed in a polygonal structure such as a square.

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

After the user applies power to the washing machine and selects a washing method suitable for the type of laundry, the washing machine detects the weight of the laundry under the control of the microcomputer (not shown) and sets the appropriate water level and time. The washing, rinsing, dehydration, and feeding / draining processes are performed in a predetermined order.

In the washing and rinsing process, the rotational force generated by the motor 5 by the action of the power switching mechanism is transmitted only to the pulsator 4 connected to the washing shaft 5, and thus the bottom surface of the washing tank 3. The pulsator (4) is installed in the washing and rinsing of the laundry is generated by the flow of the washing water while the stirring rotation in the forward and reverse directions.

At this time, according to the present invention, as shown in Figure 5, when the assembly between the inner pulsator (4a) and the outer pulsator (4b), the projection formed on the outer surface of the washing blade (400a) of the inner pulsator (4a) 410a is assembled to abut against the inner surface of the washing blade 400b of the outer pulsator 4b with a predetermined surface pressure, thereby allowing flow between the inner pulsator 4a and the outer pulsator 4b. This will not happen.

Accordingly, unlike the related art, during the stirring rotation for washing and rinsing, collision noise generated due to the flow between the inner pulsator 4a and the outer pulsator 4b is not generated.

On the other hand, the protrusion 410a may be formed on both inner surfaces of the washing blade 400b of the outer pulsator 4b.

As described above, the present invention improves the assembly structure of the existing pulsator consisting of the outer pulsator and the inner pulsator of the washing machine, the flow between the outer pulsator and the inner pulsator and the resulting noise can be prevented In this way, the quiet operation of the washing machine is possible during washing and rinsing.

Claims (3)

It includes a metal outer pulsator with a plurality of washing wings protruding on the upper surface, and an inner pulsator formed of a plastic wing is fixed inside the outer pulsator, the laundry wings are formed to match each of the washing wings of the outer pulsator. In the pulsator of the washing machine; And at least one protrusion formed on an outer surface of each washing wing of the inner pulsator to be in contact with an inner surface of each washing wing of the outer pulsator. The method of claim 1, The outer pulsator is a pulsator assembly structure of the washing machine, characterized in that made of stainless steel. The method of claim 1, The pulsator assembly structure of the washing machine, characterized in that the protrusion provided in the inner pulsator is formed in a polygonal structure.