KR100315808B1 - A prevention apparatus noise &vibration for drain pump - Google Patents

Abstract

The present invention relates to a drainage pump of a forced drainage automatic washing machine,

In order to minimize noise and vibration caused by the coupling of the impeller and shaft tabs during the initial operation of the drain pump, the coupling noise and vibration are minimized as well as the breakage of components as well as the repulsive action of the magnetic material instead of the existing tab shape. The pumping performance can be improved, and the coupling device using magnetic material is formed on the magnet, which eliminates the need for a separate sealing device and minimizes the coupling noise and vibration during the initial operation. The complex shape of the joining part provides another effect that can be simplified.

Description

A prevention apparatus noise & vibration for drain pump

The present invention relates to a drainage pump of a forced drainage type automatic washing machine, and more particularly, to an apparatus for preventing noise and vibration of a drainage pump for reducing noise and vibration generated during initial driving of the drainage pump.

In general, when a washing machine puts soiled clothing into a washing solution, the detergent separates the fibers from the fibers by the chemical action of the detergent, but the action of the detergent alone takes a long time, so that the speed of time of removal is increased by applying mechanical action such as friction or vibration. Will perform the action.

In the washing operation control of the washing machine, first, by detecting the quantity of clothes or the like put into the washing tank, if the quantity is determined, the water flow, the detergent, and the total washing time are set according to the quantity, and then the pulsator is rotated in reverse with the whole washing time. Vortex the water through the laundry to perform the laundry administration to separate the stains on the laundry by friction with the laundry.

Next, when the washing administration is completed, the turbid water is discharged and the fresh water is supplied from the washing tank to perform a rinsing cycle for rinsing for the number of times already set in the system. When the rinsing stroke is completed, the water in the washing tank is discharged and the induction motor is rotated at a high speed at a predetermined speed to remove the laundry water by centrifugal separation to perform dehydration stroke.

Washing the laundry in the washing tank while performing the washing operation control as described above, the drain pump is used to forcibly drain the water.

1 is a perspective view showing the configuration of a general drain pump, Figure 2 is a cross-sectional view of FIG. 3A is a view illustrating a state in which an impeller tab and a rotating shaft tab are fastened in a drain pump according to the related art, and FIG. 3B is an exploded view of the impeller tab and the rotating shaft tab in FIG. 3A.

As shown in FIGS. 1 to 3, the drain pump includes a drain pump case 10 including a rotor chamber 11 and an impeller chamber 12, and an inlet port through which a water flows in and out through a pumping action. 13 and the outlet 14, the stator 15 which is provided outside the rotor chamber 11 to form a magnetic field according to the application of power, the coil C surrounding the stator 15, and the coil (C) the bobbin 16 which is a container which winds up, the magnet 17 inserted into the said rotor chamber 11, the shaft 18 integrally formed with the magnet 17, and the upper side of the said shaft 18. An impeller 19 having a shaft tab 18a formed to protrude from an end, a space S into which the shaft tab 18a can be inserted, and one side of the space S of the impeller 19. An impeller tab 19a formed to be coupled with the shaft tab 18a and the impeller 19 is removed from the shaft 18. To prevent comprises a fixed circular plate 20 provided at the lower side of the shaft tab (18a).

In the conventional operation of the drain pump, the magnetic field is generated when the power is applied to the stator 15, the shaft 18 is formed integrally with the magnet 17 by the interaction of the stator 15 and the magnet 17 Will rotate. Through the rotation of the shaft 18, the impeller 19 connected to the shaft 18 is rotated to perform a pumping action.

At this time, since the stator 15 and the magnet 17 of the magnetic material (iron) material are attached to each other immediately before the initial driving in performing the pumping action, the initial driving should be performed since the pump having a large output should be used. This is a very important part of the pump. Accordingly, as illustrated in FIG. 3B, an impeller may be coupled to the shaft tab 18a having a protrusion formed at the end of the shaft 18 integrally formed with the magnet 17 and the shaft tab 18a. Initial drive is controlled by the interaction of the impeller tab 19a formed in the space S of 19.

That is, when the power supply is applied and the impeller tab 19a and the shaft tab 18a rotate only the shaft 18 by a predetermined angle, that is, about 270 °, the shaft tab 18a and the impeller tab 19a are coupled to the shaft. 18 and the impeller 19 are integrated to perform the pumping action while rotating.

However, since the noise is generated when the impeller tab 19a and the shaft tab 18a are coupled, a grease is inserted into the space S of the impeller 19 and an O-ring (21) will be sealed. As such, when the shaft tab 18a is inserted into the space S of the impeller 19, the fixed disc 20 may not be easily detached from the shaft 18 as shown in FIG. 3A. It is positioned between the tab 18a and the impeller 19.

However, in the conventional case, since the tabs cannot be directly formed on the shaft 18, a means for inserting the shaft tab 18a and the o-ring 21 must be formed, and forcibly fixed to the shaft 18. There is a problem that additional processes and equipment are required.

In addition, since the shaft tab 18a portion may be easily broken, it is accompanied by a difficulty and a cost increase in manufacturing a tab shape by processing a brass material, and the impeller 19 when pumping hot water with the drainage pump as described above. There is also a problem that the shape of the impeller tab 19a is changed due to the heating deformation, so that the coupling with the shaft tab 18a is not properly performed.

First of all, even when sealing the O-ring 21 to prevent noise generated when the shaft tab 18a and the impeller tab 19a are coupled, coupling noise and vibration still occur, thereby causing discomfort to the user. There is a problem that can be.

The present invention has been made to solve the above problems of the prior art, the object of which is to replace the existing tab shape to minimize the noise and vibration generated by the coupling of the impeller tab and the shaft tab during the initial operation of the drain pump By using the repulsive force of the magnetic material to minimize the damage of the components as well as coupling noise and vibration to minimize the noise and vibration of the drain pump to improve the pumping performance.

In addition, another object of the present invention is to form a coupling device using a magnetic material in the magnet eliminates the need for a separate sealing device and minimizes the coupling noise and vibration during initial operation, thereby improving pumping performance, coupling of the shaft and impeller An object of the present invention is to provide a noise and vibration preventing device of a drain pump, in which a complicated shape of a part can be simplified.

1 is a perspective view showing the configuration of a general drain pump,

2 is a cross-sectional view of FIG.

Figure 3a is a view showing a state in which the impeller tab and the rotary shaft tab is fastened in the drain pump according to the prior art,

3b is an exploded view of the impeller tab and the rotating shaft tab in FIG. 3a;

Figure 4 is a cross-sectional view showing the configuration of the first embodiment by the noise and vibration prevention device of the drain pump according to the present invention,

Figure 5a is a cross-sectional view showing in detail the impeller as a component of Figure 4,

FIG. 5B is a view illustrating a first magnet pocket and a magnetic body in FIG. 5A;

6A is a cross-sectional view showing in detail a coupling cylinder which is a component of FIG. 4;

6B is a view illustrating a second magnet pocket and a magnetic body in FIG. 6A;

7 is a view showing a state in which the impeller and the coupling cylinder are coupled,

8a is a view showing a state just before the impeller and the coupling cylinder are coupled,

8b is a view showing a state after the impeller and the coupling cylinder are coupled,

9 is a cross-sectional view showing the configuration of the first embodiment by the noise and vibration preventing device of the drain pump according to the present invention;

FIG. 10A is a view illustrating a state immediately before coupling of an impeller and a coupling cylinder, which are some components of FIG. 9;

FIG. 10B is a view illustrating a state after coupling of an impeller and a coupling cylinder, which are some components of FIG. 9; FIG.

<Explanation of symbols on main parts of the drawings>

50: drain pump case 60: impeller chamber

61, 65: impeller 62, 83: first magnet pocket

63: fastening groove 70: rotor chamber

71 and 81: magnets 72 and 82: rotating shaft

74, 84: second magnet pocket 75: fixed disk

85: sealing device F: repulsive force

According to a first feature of the noise and vibration prevention device of the drain pump according to the present invention for solving the above problems, the drain pump case consisting of an impeller chamber and a rotor chamber, and installed outside the rotor chamber according to the power applied A stator forming a magnetic field, a coil surrounding the stator, a magnet inserted into the rotor chamber, a rotation shaft integrally formed with the magnet, a coupling cylinder fastened to an upper end of the rotation shaft, and the coupling cylinder The coupling magnetic body portion formed to insert a magnetic body on one side of the impeller having a space formed inside the impeller chamber and the coupling cylinder can be inserted, and the coupling magnetic body portion and the repulsive force on one side of the space portion of the impeller Impeller magnetic body portion that the magnetic body is arranged to be generated, and the impeller from the rotating shaft It includes a stationary disk installed on the lower side of the coupling cylinder to prevent the departure.

In addition, according to the second aspect of the present invention, a fixing groove for the fixed disk is formed in the space portion of the impeller so that the fixed disk is fastened and fixed.

According to a third aspect of the invention, the space portion of the impeller is sealed after the viscous fluid is inserted therein.

On the other hand, according to a fourth aspect of the present invention, a drain pump case consisting of an impeller chamber and a rotor chamber, a stator installed outside of the rotor chamber to form a magnetic field according to the application of power, a coil surrounding the stator, and An impeller having a magnet inserted into the rotor chamber, a rotating shaft installed at the center of the magnet, a coupling cylinder fastened to an upper end of the rotating shaft, and a space portion formed inside the impeller chamber, into which the coupling cylinder can be inserted. And a fixed disc installed on the lower side of the coupling cylinder to prevent the impeller from being separated from the rotating shaft, and a magnetic body portion on which the magnetic bodies are positioned so that mutual repulsion occurs on the lower side of the rotating shaft and the bottom of the magnet. do.

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

4 is a cross-sectional view showing the configuration of the first embodiment by the noise and vibration prevention device of the drain pump according to the present invention, Figure 5a is a cross-sectional view showing in detail the impeller of some components of Figure 4, Figure 5b In FIG. 5A, the first magnet pocket and the magnetic body are illustrated. 6A is a cross-sectional view illustrating in detail a coupling cylinder which is a part of FIG. 4, and FIG. 6B is a view illustrating a second magnet pocket and a magnetic body in FIG. 6A, and FIG. 7 is an impeller and a coupling cylinder. The combined state is shown. 8A is a view showing a state immediately before the impeller and the coupling cylinder are coupled, and FIG. 8B is a view showing a state after the impeller and the coupling cylinder are coupled.

On the other hand, Figure 9 is a cross-sectional view showing the configuration of the first embodiment by the noise and vibration prevention device of the drain pump according to the present invention, Figure 10a is just before the coupling cylinder and the impeller and some components of Figure 9 are coupled FIG. 10B is a view illustrating a state after the impeller and the coupling cylinder, which are some components of FIG. 9, are coupled to each other.

First, referring to FIGS. 5 to 8, a drain pump case 50 including an impeller chamber 60 and a rotor chamber 70 and an outer portion of the rotor chamber 70 will be described. A stator (not shown) installed to form a magnetic field upon application of power, a coil (not shown) surrounding the stator, a magnet 71 inserted into the rotor chamber 70, and a magnet 71 integrally with the magnet 71. Rotation shaft 72 is formed, the coupling cylinder 73 is fastened to the upper end of the rotary shaft 72, and the inside of the magnetic material (M) to be inserted into one side of the coupling cylinder 73 constant An impeller 61 having a space formed therein a second magnet pocket 74, a space S into which the coupling cylinder 73 and the second magnet pocket 74 can be inserted, and the impeller 61. The magnetic body (M) to face the same pole so that the second magnet pocket 74 and the repulsive force is generated on one side of the space (S) of the A first magnet pocket 62 to be engaged, a stationary disc 75 provided on the lower side of the coupling cylinder 73 so as to prevent the impeller 61 from being separated from the rotation shaft 72, and the fixing It consists of a fastening groove 63 formed in the lower side of the space portion (S) of the impeller 61 so that the disc 75 is fastened.

In particular, in FIG. 5 in which the portion 'A' of FIG. 4 is enlarged, the first magnet pocket 62 positioned in the space S of the impeller 61 and the first magnet pocket 62 are inserted into the first magnet pocket 62. Magnetic material M is shown. The first magnet pocket 62 is formed on one side of the space portion S, which is hollowed in a '凸' shape so that the coupling cylinder 73 can be easily inserted into the impeller 61. The magnetic body M inserted into the first magnet pocket 62 is rounded to have a shape similar to the outer shape of the first magnet pocket 62 as shown in FIG. 5B.

6A and 6B, a coupling cylinder 73 and a second magnet pocket 74 inserted into the space S of the impeller 61 are illustrated, and the second magnet pocket 74 is illustrated. It is formed in a fan shape to be attached to one side of the coupling cylinder (73). In addition, similarly to the first magnet pocket 62, the magnetic body M formed in a round shape is inserted into the second magnet pocket 74.

Thus, the form in which the coupling cylinder 73 is inserted in the impeller 61 is shown in FIG. At this time, the fixed disk 75 is fitted into the fastening groove 63 formed in the impeller 61 so that the impeller 61 and the coupling cylinder 73 are not separated.

In the operation according to the first embodiment of the present invention configured as described above, the coupling cylinder 73 is formed on the upper part of the rotation shaft 72 formed integrally with the magnet 71, and the inside of the impeller 61 The coupling cylinder 73 is fitted into the space S formed in the coupling chamber 73. At this time, the impeller 61 is rotated by inserting the fixed disc 75 into the fastening groove 63 of the impeller 61 so that the impeller 61 and the rotating shaft 72 are fixed to each other. Deviation from 71 is certainly prevented.

Thereafter, when power is applied to the system, a magnetic field is generated in the stator, and the rotating shaft 72 rotates due to the interaction between the magnet 71 and the stator, and thus the rotating shaft 72 through the coupling cylinder 73. ) Is connected to the impeller 61 rotates to perform the pumping action. However, in the initial driving, as shown in FIG. 8A, only the coupling cylinder 73 is rotated alone in the space S of the impeller 61 so as to be formed on one side of the coupling cylinder 73. The pocket 74 comes close to the first magnet pocket 62 formed inside the impeller 61.

Here, since the magnetic bodies M respectively inserted into the first magnet pocket 62 and the second magnet pocket 74 are arranged to face the same poles, repulsive force is generated between the magnetic bodies M. FIG. do. Accordingly, as shown in FIG. 8B, the impeller (1) and the second magnet pocket (74) do not collide with each other and maintain a constant distance by a distance proportional to the repulsive force between the magnetic bodies (M). 61 and the coupling cylinder 73 is coupled, thereby causing the impeller 61 and the coupling cylinder 73 to rotate integrally.

Therefore, unlike the conventional tabs formed on each of the impeller and the rotating shaft is rotated in contact with each other in the present invention while maintaining a certain distance without the first magnet pocket 62 and the second magnet pocket 74 is in contact with each other Since coupling the impeller 61 and the rotating shaft 72, the coupling noise and vibration is significantly reduced.

Next, a configuration and an operation according to the second embodiment of the present invention will be described with reference to FIGS. 9 and 10.

The overlapping content as in the first embodiment is omitted, and the part where the second embodiment differs from the first embodiment is the impeller 65 and the rotation shaft 82 to be combined or integrally formed with each other. In order to reduce noise and vibration generated during driving, first and second magnet pockets 83 and 84 into which the magnetic body M is inserted into the magnet 81 and the rotating shaft 82 are respectively provided.

That is, the first magnet pocket 83 is formed in the lower portion of the magnet 81, the second magnet pocket 84 is formed on the rotating shaft 82 to correspond to the first magnet pocket 83, The magnetic bodies M are inserted into the respective magnetic pockets 83 and 84 so as to face the same poles.

Therefore, as shown in FIG. 10A, when only the first magnet pocket 83 rotates at an angle to approach the second magnet pocket 84 during initial driving, the first magnet pocket 83 as shown in FIG. 10B. Since the repulsive force is generated between the and the second magnetic pocket 84, the first magnetic pocket 83 and the second magnetic pocket 84 is applied to the repulsive force between the respective magnetic body (M) as in the first embodiment described above. They rotate together by a proportional distance.

In the first embodiment, the magnet 81 and the rotation shaft 82 are integrally formed with each other. In the second embodiment, when the magnet 81 and the rotation shaft 82 are integrally rotated, the first and second magnets 81 and the rotation shaft 82 are integrally formed. Since the second magnet pockets 83 and 84 may not meet each other, the magnet 81 and the rotation shaft 82 are preferably separated from each other.

On the other hand, reference numeral 85, which is not described in Figure 9 is a sealing device formed between the impeller 65 and the magnet 81, and will be applied in both the first embodiment and the second embodiment described above.

The noise and vibration preventing device of the drain pump of the present invention configured as described above is a repulsive force of the magnetic body instead of the existing tab shape so that the noise and vibration generated by the coupling of the impeller tab and the shaft tab during the initial driving of the drain pump By using the action, the coupling noise and vibration as well as the breakage of the parts can be minimized, thereby improving the pumping performance.

In addition, the present invention eliminates the need for a separate sealing device by forming a coupling device using a magnetic material and minimizes coupling noise and vibration during initial driving, thereby improving pumping performance, and complicates the coupling portion of the rotating shaft and the impeller. There is another effect that the shape can be simplified.

Claims (4)

A drain pump case consisting of an impeller chamber and a rotor chamber, a stator installed outside the rotor chamber to form a magnetic field according to the application of power, a coil surrounding the stator, a magnet inserted into the rotor chamber, the magnet and A rotary shaft integrally formed, a coupling cylinder fastened to an upper end of the rotary shaft, a coupling magnetic body portion formed so that a magnetic body is inserted into one side of the coupling cylinder, and a coupling cylinder formed inside the impeller chamber An impeller having a space portion that can be formed; Comprising a stationary disc installed on the underside of the cylinder Noise and vibration protection of the drainage pump as. The method of claim 1, Noise and vibration preventing device of the drain pump, characterized in that the fixing groove is formed in the space portion of the impeller fastening the fixed disk is fixed to the fixed disk. The method of claim 1, Noise and vibration preventing device of the drain pump, characterized in that the space portion of the impeller is sealed after the viscous fluid is inserted therein. A drain pump case consisting of an impeller chamber and a rotor chamber, a stator installed outside the rotor chamber to form a magnetic field according to the application of power, a coil surrounding the stator, a magnet inserted into the rotor chamber, and the magnet An impeller having a rotating shaft installed at a central portion, a coupling cylinder fastened to an upper end of the rotating shaft, a space formed inside the impeller chamber, into which the coupling cylinder can be inserted, and preventing the impeller from being separated from the rotating shaft. Noise and vibration of the drain pump, characterized in that it comprises a stationary disk installed on the lower side of the coupling cylinder, and a magnetic body, each magnetic body is positioned so that mutual repulsion occurs on the lower side of the rotary shaft and the bottom of the magnet Prevention device.