KR19990070177A - Pump case fixing structure of the washing machine - Google Patents

Abstract

The present invention relates to a pump case fixing structure of a washing machine, wherein at least one fitting protrusion is integrally injection-molded to couple a fixed position to a pump case fixed with a fixing screw to an outer case, and a fitting protrusion is fitted to the outer case. When the fitting groove is formed, the center of the through hole of the outer case and the screw hole formed in the boss can be automatically matched when fixing the pump case, thereby reducing the fixing work and time of the pump case, and in particular, the fixing screw can be tightened accurately. This prevents boss breakage and improves the reliability of the pump casing.

Description

Pump case fixing structure of the washing machine

The present invention relates to a pump case fixing structure of a washing machine, and more particularly, it is possible to simply fix the pump case for forcibly draining the wash water to the outer case, and in particular, the damage caused in the fixing process of the pump case is not disclosed. It relates to a pump case fixing structure of a washing machine so as to prevent.

In general, a washing machine for removing contaminants on laundry by emulsifying the detergent and rotating the pulsator and impact on the laundry is illustrated in FIG. 1. Similarly, the outer case 10 and the top cover 12 and the base 14 coupled to the upper and lower portions thereof, respectively, and the washing tank 16 installed in the outer case 10 to store laundry and wash water, Is installed in the lower portion of the washing tank 16 is composed of a drive motor 18 for providing a driving force and a power transmission device 22 for receiving the driving force via the belt 20.

A water supply valve 24 is mounted at one side of the top cover 12 to supply a predetermined amount of washing water into the washing tank 16, and inside the washing tank 16, centrifugal force of the washing water according to the driving force of the driving motor 18. The dehydration tank 26 is installed so that the laundry can be dewatered, and the washing tank 16 is provided with a drain hole 16a for draining the dewatered laundry water.

The upper part of the washing tank 16 is equipped with a balancer 28 to reduce the vibration generated during operation of the washing machine, the bottom surface of the dehydration tank 26 is coupled to the upper portion of the power transmission device 22 to wash the water special A pulsator 30 for making water flow is rotatably arranged.

On the other hand, the drainage pump as shown in Figure 2 is fixed to the inner wall surface of the outer case 10 in order to drain the contaminated washing water upon completion of the washing stroke of the laundry. Drainage pump is composed of a pump case (34) which is injection-molded with synthetic resin and a pump motor 34 for forcibly draining the wash water is fixed to a plurality of fixing members on one surface thereof.

The pump case 32 is formed at the corresponding positions of the inlet and outlet portions 32a and 32b and the pump motor 34, respectively, protruding at positions corresponding to each other with respect to the outer circumferential surface thereof, to filter foreign substances contained in the wash water. And a plurality of bosses having screw holes 36a at positions perpendicular to the inlet and outlet portions 32a and 32b, provided with a filter inlet portion 32c into which a filter (not shown) is inserted. The boss 36 protrudes.

The other end of the first drain hose 38, one end of which is connected to the drain hole 16a, is connected to the inlet part 32a of the pump case 32, and the second drain hose 40 is connected to the outlet part 32b. A plurality of fixing screws 42 penetrating through the through holes 10a of the outer case 10 are respectively screwed into the screw holes 36a of the bosses 36.

The pump case fixing structure of the conventional washing machine configured as described above has a center of the screw hole 36a formed in the boss 36 of the pump case 32 including the pump motor 34 and the center of the through hole 10a of the outer case 10, respectively. Then, the pump case 32 is fixed by tightening with a plurality of fixing screws 42.

Thereafter, the cover top 12 coupled to the upper portion of the outer case 10 is opened to store laundry in the dehydration tank 26, and then the water supply valve 24 is operated to supply a certain amount of washing water into the washing tank 16. When the driving motor 18 is driven in one state, the driving force thereof is transmitted to the power transmission device 22 via the belt 20, and at the same time, the pulsator 30 is rotated while reducing the rotational force.

In accordance with the forward and reverse rotation of the pulsator 30, the wash water creates a water flow up and down by centrifugal force to perform a washing stroke. When the washing is completed, the dehydration tank 26 is rotated at a high speed by the driving motor 18 and the power transmission device 22 in one direction to drain the laundry while the wash water absorbed in the laundry is drained.

At this time, the contaminated washing water is discharged to the outside through the second drain hose 40 connected to the pump case 32 and its outlet portion 32b as the pump motor 34 is operated. That is, the washing water flows into the inlet portion 32a of the pump case 32 connected to the drain hole 16a of the washing tub 16 and the first drain hose 38 and at the same time the filter inlet portion 32c of the pump case 32. The foreign matter is filtered out by the filter fitted into the) and is drained to the second drain hose 40 connected to the outlet portion 32b.

However, since the pump case is fixed to the inner wall surface of the outer case as described above, the pump case is fixed with a plurality of fixing screws, making it difficult to coincide with the center of the screw hole and the through hole of the boss in a short time. There was a problem in that the upper part of the boss is easily damaged due to excessive tightening of the fixing screw in a mismatched state, thereby reducing the reliability of the pump case.

The present invention is to solve the above problems, an object of the present invention is to reduce the fixed work and time of the pump case as the center of the through-hole of the outer case and the screw hole formed in the boss is automatically matched, the fixing screw The present invention provides a pump case fixing structure of a washing machine that can be tightened precisely to prevent breakage of the boss and improve the reliability of the pump case.

1 is a cross-sectional view showing a general washing machine,

Figure 2 is an exploded perspective view showing a conventional pump case fixed to the washing machine of Figure 1,

3 is an exploded perspective view showing a pump case fixing structure of the washing machine according to the present invention;

4 is an enlarged cross-sectional view illustrating a state in which a pump case according to the present invention is fixed to an outer case.

Explanation of symbols on the main parts of the drawings

42: set screw 50: outer case

50a: through hole 50b: fitting groove

60: pump case 60a, 60b: inlet and outlet

60c: filter inlet portion 62: pump motor

64: boss 64a: screw hole

66: fitting

Features of the present invention for achieving the above object, the pump motor is fixed to one surface of the pump case provided for draining the wash water, the pump case of the washing machine for fixing the pump case to the outer case with a fixing screw In the structure, the pump case is provided with a positioning portion for determining a fixed position with respect to the outer case, the positioning portion is fitted into the fitting groove formed in the outer case pump by the fixing screw in the fixed position is determined Is achieved by the case being fixed.

The positioning portion according to the invention is achieved by at least one fitting projection which is integrally injection molded into the outer peripheral surface of the filter inlet portion of the pump case.

Hereinafter, a preferred embodiment of the pump case fixing structure of the washing machine according to the present invention will be described in detail based on the accompanying drawings.

In the present invention, the same configuration among the configuration of the washing machine refers to the same reference numerals for convenience of description. 3 and 4 is a view showing the pump case fixing structure according to the present invention, the top cover 12 and the base provided with a water supply valve 24 for supplying the wash water in the upper and lower parts of the outer case 50 14 is coupled to each other, and the through case 50a is formed in the outer case 10 so that a plurality of fixing screws 52 for fixing the pump case 60 pass therethrough.

In the outer case 50, a washing tank 16 including a dehydration tank 26 is installed to store laundry, and a drainage hole is disposed at the bottom of the washing tank 16 to drain the washing water to the outside after washing the laundry. 16a is formed, the lower portion is provided with a drive motor 18 for providing a driving force and a power transmission device 22 that receives the driving force by the belt 20.

The pump inlet part is fixed to the pump case 60 by the fixing member, and a pump motor 62 which is operated to forcibly drain the wash water is inserted into a position corresponding to the pump motor 62. 60c is formed, and first and second drain hoses 38 and 40 are respectively connected to the inlet and outlet portions 60a and 60b protruding from the outer circumferential surface of the pump case 60.

A plurality of bosses 64 protrude from the pump case 60 at right angles to the inlet and outlet portions 60a and 60b, and the threaded holes 64a are screwed to the bosses 64 so that the set screws 42 are tightened. It is formed, the pump case 60 is provided with at least one or more positioning portions to determine its fixed position.

The outer case 50 has a fitting groove 50b recessed inwardly at a position corresponding to the positioning portion, and the positioning portion is integrally injection molded into the outer circumferential surface of the filter inlet portion 60c and fitted into the fitting groove. It becomes the fitting projection 66.

The operation of the pump case fixing structure of the washing machine according to the present invention configured as described above will be described in detail.

The pump motor 62 for forcibly draining the wash water fixes the pump case 60 fixed to one surface thereof to the outer case 50. That is, as the fitting projection 66 injection-molded in the filter inlet part 60c is fitted into the fitting groove 50b, the through hole 50a and the screw hole 64a respectively formed in the outer case 50 and the boss 64 are respectively. ) Center automatically matches.

As described above, the pump case 60 is fixed by fixing the pump case 60 with a plurality of fixing screws 42 passing through the through hole 50a in a state where the center of the through hole 50a and the screw hole 64a coincide. To prevent the breakage of the boss 64 generated during the fixing operation of.

Thereafter, when the driving motor 18 installed under the washing tank 16 is driven, its driving force is transmitted to the power transmission device 22 by the belt 20 to rotate the pulsator 30, and the pulsator 30 According to the rotation of), the wash water makes the water flow up and down by centrifugal force and performs the washing process.

When the pump motor 62 is operated to drain the contaminated washing water during the dehydration stroke after the washing stroke is completed, the washing water is pumped along the drain hole 16a and the first drain hose 38. At the same time as entering the inlet (60a) of the foreign matter is filtered by the filter is discharged to the outside through the second drain hose 40 connected to the outlet (60b).

Although in the present invention, the fitting protrusion is injection molded to the outer circumferential surface of the filter inlet portion, the molding position can be changed to suit the fixed position of the pump case fixed to the outer case.

As described above, according to the pump case fixing structure of the washing machine according to the present invention, the center of the through-hole of the outer case and the screw hole formed in the boss can be automatically matched, thereby reducing the fixing work and time of the pump case, and fixing The screw can be tightened precisely to prevent the boss from being damaged and to improve the reliability of the pump case.

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

Claims (3)

In the pump case fixing structure of the washing machine for fixing the pump motor to one surface of the pump case provided for draining the wash water, and fixing the pump case to the outer case with a fixing screw, The pump case is provided with a positioning unit for determining a fixed position with respect to the outer case, the positioning unit is fitted into the fitting groove formed in the outer case, the pump case is fixed by the fixing screw in the fixed position is determined Pump case fixing structure of the washing machine characterized in that the. The pump case fixing structure of claim 1, wherein the positioning unit comprises at least one fitting protrusion integrally injection molded to the outer circumferential surface of the filter inlet of the pump case. 3. The pump case fixing structure of a washing machine according to claim 2, wherein a molding position of the positioning unit is variable according to a fixing position of the pump case fixed to the outer case.