KR100315757B1 - 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 tab and the shaft tab during the initial operation of the drainage pump, a shock absorbing member is disposed between the impeller and the shaft tab to minimize the shock caused by the coupling. In addition, coupling noise and vibration are minimized to provide an effect of improving pumping performance.

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 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 made of magnetic material (iron) and the magnet 17 are attached to each other immediately before the initial driving, the initial driving is performed because a 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 18 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 a drain 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-mentioned problems of the prior art, the object of which is between the impeller and the shaft tab 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 providing a shock absorbing member that can alleviate the shock generated during the coupling to provide a noise and vibration prevention device of the drain pump that can minimize the damage to the components as well as coupling noise and vibration to improve the pumping performance.

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;

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

5 is an enlarged view of portion 'A' of FIG. 4, and FIG. 6A is an exploded view of FIG. 5 and an impeller is shown.

6B and 6C are exploded views of FIG. 5, respectively, illustrating a coupling cylinder and a cushioning member;

FIG. 7 is a bottom view of FIG. 5 and FIG. 7A illustrates a case in which only the rotor is rotated.

FIG. 7B is a view showing a state in which the buffer member is integrally rotated between the rotor and the impeller tab while being inserted;

8 is a bottom view showing a second embodiment of the noise and vibration preventing device of the drain pump according to the present invention,

Figure 9 is a bottom view showing a third embodiment of the noise and vibration preventing device of the drain pump according to the present invention.

<Explanation of symbols on main parts of the drawings>

50: drain pump case 60: rotor chamber

61: magnet 62: rotation axis

63a, 63b, 63c: coupling cylinder 64a, 64b, 64c: coupling tab

65: fixed disk 70: impeller chamber

71: impeller 72a, 72b, 72c: impeller tap

R1, R2, R3: buffer member

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 rotating shaft formed on the magnet, a coupling cylinder formed at an upper end of the rotating shaft, and one side of the coupling cylinder. An impeller having a coupling tab formed in the impeller, a hollow part installed inside the impeller chamber, into which a coupling cylinder can be inserted, and formed at a position spaced apart from the coupling tab at one side of the hollow part of the impeller; An impeller tab having a rotation axis rotated by a predetermined angle and then coupled with the coupling tab, and the coupling And a shock absorbing member formed between the coupling tab and the impeller tab to prevent noise and vibration generated when the impeller tab is coupled, and to prevent the impeller from being separated from the rotating shaft. It includes a stationary disk installed on the lower side of the cylinder.

In addition, according to the second aspect of the present invention, the buffer member is formed of a rubber material.

According to a third aspect of the present invention, the shock absorbing member is formed to cover at least one of the coupling tab and the impeller tab.

In addition, according to the fourth aspect of the present invention, the buffer member is formed in an annular shape in which a predetermined portion is opened to be positioned between the coupling tab and the impeller tab.

According to a fifth aspect of the present invention, the space portion of the impeller is sealed after the viscous fluid is inserted. Finally, according to the sixth aspect of the present invention, a magnet for pushing the tabs to each other in the coupling tab and the impeller tab is provided. Attached.

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

Figure 4 is a cross-sectional view showing a configuration according to a first embodiment of the noise and vibration preventing device of the drain pump according to the present invention, Figure 5 is an enlarged view 'A' portion of Figure 4, Figure 6a 5 is an exploded view of the impeller, and FIGS. 6B and 6C are exploded views of the coupling cylinder and the shock absorbing member, respectively. And, Figure 7 is a bottom view of Figure 5, Figure 7a is a view showing a case in which only the rotor rotates, Figure 7b is a state in which the integrally rotated state in which the cushioning member is fitted between the rotor and the impeller tab is shown Drawing.

On the other hand, Figure 8 is a bottom view showing a second embodiment of the noise and vibration preventing device of the drain pump according to the present invention, Figure 9 is a third embodiment of the noise and vibration preventing device of the drain pump according to the present invention is shown Bottom view.

First, referring to FIG. 4 to FIG. 7, a drain pump case 50 including a rotor chamber 60 and an impeller chamber 70 and an outer side of the rotor chamber 60 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 61 inserted into the rotor chamber 60, and the magnet 61 integrally with the magnet 61. A rotation shaft 62 formed of a coupling shaft, a coupling cylinder 63a formed at an upper end of the rotation shaft 62, a coupling tab 64a formed at one side of the coupling cylinder 63a, and the coupling. An impeller 71a having a hollow portion S into which a cylinder 63a can be inserted, and a side of the hollow portion S of the impeller 71a spaced apart from the coupling tab 64a at a predetermined angle. Noise and vibration generated when the impeller tab 72a and the coupling tab 64a and the impeller tab 72a are coupled to each other In order to prevent the shock absorbing member (R1) formed in the shape of a semi-circular ring positioned between the coupling tab (64a) and the impeller tab (72a) to perform a buffer role, the impeller (71a) can be prevented from being separated from the rotating shaft It consists of a fixed disk 65 provided on the lower side of the coupling cylinder (63a).

Here, the rotor consists of the magnet 61 and the rotation shaft 62. And, as shown in FIG. 5, the impeller 71a has a hollow part S such that the impeller 71 is not separated after the coupling cylinder 63a is fitted into the hollow part S of the impeller 71a. A fixing groove 73 is formed at the lower side to insert the outer circumferential surface of the fixing disc 65.

4 illustrates the impeller 71a, the coupling cylinder 63a, and the shock absorbing member R1 in more detail, in which the impeller 71a and the rotor are coupled to each other. 6A illustrates a hollow portion S having a cross-sectional shape '凸' inside the impeller 71a, and an impeller tab 72a protruding inwardly is formed at one side of the hollow portion S. The lower side of the impeller tab 72a is formed with a fixing groove 73 fastened to the fixed disk 65.

In addition, FIG. 6C shows a coupling cylinder 63a inserted into the hollow portion S of the impeller 71a, and the one side of the outer circumferential surface of the coupling cylinder 63a is coupled with the impeller tab 72a. A coupling tab 64a is shown integrally formed with the coupling cylinder 63a, and a fixed disk 65 is located below the coupling tab 64a. On the other hand, the coupling tab 64a is provided. ) And the impeller tab 72a are formed to be spaced apart by 180 ° from the state before the rotation shaft is fired.

When the coupling cylinder 63a thus formed is fitted to the impeller 71a, the shock absorbing member R1 as shown in FIGS. 7A and 7B is positioned between the impeller tab 72a and the coupling tab 64a. After insertion, the coupling cylinder 63a is inserted into the hollow part S of the impeller 71a. Here, the shock absorbing member (R1) is formed of a rubber material to mitigate the impact generated when the coupling tab (64a) and the impeller tab (72a) is coupled, both ends of the shock absorbing member (R1) It is formed thicker than the central portion so that both ends thereof face the impeller tab 72a over the coupling tab 64a.

In the operation of the first embodiment according to the present invention configured as described above, when the power is applied, the magnetic field is generated in the stator and the rotating shaft 62 rotates due to the interaction of the stator and the magnet 61, and the rotation of the rotating shaft 62 As the rotation is coupled, the coupling cylinder 63a and the impeller 71a formed at the upper end of the rotation shaft 62 are coupled and rotate to perform a pumping action.

At this time, the initial rotation of the rotating shaft 62, as shown in Figure 7a, the rotating shaft 62 and the magnet 61 is rotated integrally, that is, only the rotor alone, accordingly one side of the coupling cylinder (63a) Coupling tabs 64a formed in the upper portion of the impeller tab 72a are brought close to each other. However, after the coupling tab 64a is first contacted with the shock absorbing member R1 by the rotation of the rotor, the coupling tab 64a is continuously rotated so that the coupling tab 64a and the impeller tab 72a are interposed between the shock absorbing members R1. Is indirectly contacted. Thereafter, as shown in FIG. 7B, the shock absorbing member R1 is sandwiched between the impeller tab 72a and the coupling tab 64a.

Therefore, since the impeller tab 72a and the coupling tab 64a are not in direct contact with each other when the rotor and the impeller 71a are coupled, the coupling noise and vibration that have been previously generated may be significantly reduced.

Next, referring to FIG. 8, a description of the second embodiment of the present invention will be described with reference to FIG. 8.

When the drain pump is initially driven, an impeller tab 72b formed at one side of the impeller 71b and a coupling tab 64b formed at one side of the coupling cylinder 63b are coupled to each other so as to correspond to the impeller tab 72b. When ringing, a rubber buffer member R2 is covered on the front surface of the impeller tab 72b so that the coupling tab 64b and the impeller tab 72b do not directly contact each other. Magnets are attached to the tab 64b and the impeller tab 72b, respectively, and the magnetic poles of the magnets are arranged so that the tabs push each other.

That is, the coupling tab 64b and the impeller tab 72b are integrally formed while the shock is alleviated by the shock absorbing member R2 immediately before the coupling tab 64b is rotated and coupled with the impeller tab 72b. Since the tabs are pushed to each other by the magnet, it is possible to obtain an advantage that noise and vibration are significantly reduced when the coupling tab 64b and the impeller tab 72b are coupled.

Finally, a description of the third embodiment of the present invention shown in FIG. 9 centering on the portions that are different from each other and the overlapping contents in the first and second embodiments described above is similar in configuration to the second embodiment. However, the portion where the shock absorbing member R3 is installed is different.

That is, when the shock absorbing member R3 is formed to cover the coupling tab 64c and the coupling tab 64c is coupled with the impeller tab 72c by the rotation of the coupling cylinder 63c. It will alleviate the impact. Therefore, the buffer member R3 is installed between the coupling tab 64c and the impeller tab 72c when the drain pump is driven, as in the first and second embodiments described above, so that the coupling tab 64c and the impeller are installed. Since the tab 72c is not in direct contact, the impeller 71c and the coupling cylinder 63c are integrally rotated while noise and vibration are almost prevented during coupling.

The noise and vibration preventing device of the drain pump of the present invention configured as described above when coupling between the impeller and the shaft tab to minimize the noise and vibration caused by the coupling of the impeller tab and the shaft tab during the initial driving of the drain pump. By arranging the shock absorbing member to mitigate the generated shock, the coupling noise and vibration are minimized as well as the breakage of the component, thereby improving the pumping performance.

Claims (7)

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 An impeller having a rotating shaft formed therein, a coupling cylinder formed at an upper end of the rotating shaft, a coupling tab formed at one side of the coupling cylinder, and a hollow part positioned inside the impeller chamber, into which the coupling cylinder can be inserted. And an impeller tab formed at a position spaced apart from the coupling tab on one side of the hollow part of the impeller, the impeller tab being coupled to the coupling tab after the rotation axis is rotated by a predetermined angle during initial driving, and the coupling tab and the impeller. Between the coupling and impeller tabs to prevent noise and vibration caused by coupling of the tabs. And the buffer member, noise and vibration prevention apparatus of a drain pump comprises a fixed circular plate provided on the lower side of the coupling cylinder so as to prevent that the impeller is detached from the rotary shaft to perform a buffer. The method of claim 1, The shock absorbing member is a noise and vibration preventing device of the drain pump, characterized in that formed of a rubber material. The method of claim 1, The shock absorbing member is a noise and vibration prevention device of the drain pump, characterized in that formed in the form to cover at least one of the coupling tab and the impeller tab. The method of claim 1, The shock absorbing member is a noise and vibration prevention device of the drain pump, characterized in that formed in a ring shape opening a predetermined portion so as to be located between the coupling tab and the impeller tab. The method of claim 1, Noise and vibration preventing device of the drain pump, characterized in that the space of the impeller is sealed after the viscous fluid is inserted. The method of claim 1, Noise and vibration preventing device of the drain pump, characterized in that the rotating shaft and the cylinder is formed integrally. 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 upon application of power, a coil surrounding the stator, a magnet inserted into the rotor chamber, and the magnet An impeller having a rotating shaft formed, a coupling cylinder formed at an upper end of the rotating shaft, a coupling tab formed at one side of the coupling cylinder, and a hollow part located inside the impeller chamber, into which the coupling cylinder can be inserted. And an impeller tab formed at a position spaced apart from the coupling tab on one side of the hollow part of the impeller, wherein the impeller tab and the coupling tab are formed with a permanent magnet for pushing the impeller tab and the coupling tab to each other. When the rotating shaft rotates to couple the impeller tab and the coupling tab, noise and vibration Drainage pump noise and vibration prevention device, characterized in that configured to reduce.