KR100268282B1 - Rest leg of a washing machine - Google Patents

Abstract

PURPOSE: A supporting device of a washing machine is provided to effectively reduce vibration by controlling and replacing a vibration preventing device according to a variable of a vibration frequency. CONSTITUTION: A supporting device contains a hollow case(110) fixed inside a lower cover(40); a leg guide(150) installed inside the case(110) to be slid vertically; a cap(120) to cover an upper opening of the case(110); a vibration preventing spring(220) to elastically support the leg guide(150) downward by installing inside the case(110); a vibration preventing rubber(210) to generate friction force by arranging between the vibration preventing spring(220) and the leg guide(150) and sticking to the case(110); a screw rod(141) screwed with the leg guide(150) and extended by penetrating the lower cover(40); and a supporting rubber(142) combined with the screw rod(141). Vibration of a washing machine is easily reduced by controlling or replacing a thickness of the vibration preventing rubber or a constant of the vibration preventing spring.

Description

Supporting device for the washing machine

The present invention relates to a support device for a washing machine, and more particularly, to a support device for a washing machine to adjust the vibration attenuation capacity through the replacement of the internal dustproof means according to the degree of vibration as well as easy horizontal adjustment of the washing machine. .

In general, a washing machine is a device for washing laundry by rotating a rotating tub and a pulsator with a driving force of a motor. As shown in FIG. 1, the washing machine includes a housing 1 forming an outer surface of the washing machine, an upper cover 3 installed on an upper portion of the housing 1, and a lower cover coupled to a lower portion of the housing 1. It forms a skeleton through (4).

The inside of the housing 1 is provided with a water tank 1a in which washing water is filled. At this time, the tank is installed hanging on the suspension (2) for connecting between the upper side of the inside of the housing (1) and the lower end of the tank so as to attenuate the vibration.

In addition, the upper side of the water tank (1a) is opened and the washing tank (1b) formed with a plurality of dehydration holes (not shown) on the side is rotatably installed, the pulsator to form a water flow in the center of the washing tank (1b) 1c is rotatably provided.

And the lower part of the water tank 1a is provided with the drive part 5 for rotating the washing tank 1b and the pulsator 1c. The drive unit 5 is a clutch 5b for selectively transmitting the driving force of the motor 5a and the motor 5a installed on one side of the bottom surface of the water tank 1a to the pulsator 1c and the washing tank 1b, and the motor. It consists of a pulley 5c and a belt 5d which mediate power transmission between 5a and clutch 5b.

The lower cover 4 coupled to the lower part of the housing 1 allows the support of the housing 1 to be closed while closing the lower part of the lower jing 1. The washing machine is provided at four corners of the lower cover 4. A support device 6 is provided for supporting and damping vibrations.

The supporting device 6 includes a leg portion 7 made of butyl, which is a kind of rubber material, to reduce vibration generated by rotation of the washing tank 1b and the pulsator 1c, and the leg portion 7 ) Is composed of a base portion (8) integrally formed on the lower cover (4) and a fastening bolt (9) for fastening the leg portion (7) and the lower cover (4).

At this time, the base portion 8 is integrally formed with the lower cover 4, and includes a coupling hole 8a for receiving and supporting the leg portion 7 and a fastening hole 8a to which the fastening bolt 9 is fastened. do. The leg portion 7 coupled to the base portion 8 includes an insertion hole 7b provided in a shape corresponding to the coupling portion 8b so that the leg portion 7 may be inserted into the coupling portion 8b formed in the base portion 8. And a through hole 7a for penetrating the fastening bolt 9.

The support device 6 of the conventional washing machine supports the leg portion 7 coupled to the base portion 8 so that the lower cover 4 is spaced apart from the ground and absorbs vibration generated by the driving of the washing machine. Attenuate That is, the vibration is attenuated through the minute frictional contact between the bottom of the leg portion 7 and the ground and the elasticity of the leg portion 7 itself.

On the other hand, such a washing machine changes its vibration frequency when its size is downsized or enlarged. In order to effectively attenuate such a vibration, the washing machine changes the size or hardness of the leg portion 7 that absorbs vibration in accordance with the size and weight of the washing machine. Should give.

However, since the conventional washing machine support device 6 has a structure in which a part of the leg part 7 is received and coupled to the base part 8 integrally formed with the lower cover 4, the size of the support device 6 is increased. In addition to being limited, there was a limit in raising the hardness above a predetermined value due to the characteristics of the leg portion 7 manufactured by injection molding.

In addition, in view of such a problem, there is a method of avoiding the vibration frequency of the washing machine by lowering the hardness of the leg portion 7, but there is a problem that is not suitable for supporting a large capacity washing machine.

The present invention is to solve such a problem, it is an object of the present invention to provide a support device for a washing machine to effectively attenuate the vibration through the adjustment and replacement of the dust-proof means according to the variation of the washing machine vibration frequency.

1 is a side cross-sectional view showing a schematic configuration of a conventional washing machine.

2 is a side cross-sectional view showing a schematic configuration of a washing machine according to the present invention.

3 is an enlarged cross-sectional view showing the configuration of a washing machine support device according to the present invention.

<Explanation of symbols for main parts of drawing>

10 housing 30 upper cover

40: lower cover 100: support device

110 case 111 coupling tube

112: external thread 120: cap

121: adjusting guide 130: nut

140: leg portion 141: screw rod

142: support height 150: leg guide

151: control sphere 152: flange

160: spring guide 200: dustproof means

210: anti-vibration rubber 220: anti-vibration spring

A support device for a washing machine according to the present invention for achieving the above object is a washing machine comprising a lower cover provided in the lower portion of the housing, and a support device for supporting the lower cover and attenuating vibration of the washing machine. The device is a hollow case of which the lower end is fixed to the inner side of the lower cover and the top is open, the leg guide is installed to be slidable up and down inside the case, a cap covering the upper opening of the case, inside the case It is installed is provided between the anti-vibration spring to elastically support the leg guide, the lower end of the anti-vibration spring and the leg guide, the outer circumferential surface is in close contact with the inner surface of the case causing the friction force, the upper end into the case Entered and screwed with the lag guide and the lower end through the lower cover A screw rod extending to the outside, characterized in that it comprises a support rubber coupled to the lower end of the screw rod.

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

The washing machine to which the present invention is applied, as shown in FIG. 2, has a housing 10 having upper and lower openings to form a side surface, and an upper cover 30 is coupled to an upper portion of the housing 10, and a housing. The lower cover 40 is coupled to the lower portion of the 10. At this time, the housing 10 is configured by bending the anti-corrosion coated metal sheet in a rectangular enclosure shape.

The upper cover 30 is made of a plastic injection molded to cover the upper portion of the housing 10, the front of the upper cover 30 is provided with a control unit (not shown) for adjusting the operation of the washing machine, the upper cover 30 In the center of the lid is hinged lid 31 is installed to open and close the interior of the housing (10).

The inside of the housing 10 is provided with a water tank 11 in which washing water is filled. The water tank 11 is provided in a cylindrical shape with an upper side opened, and is suspended by a suspension device 20 connected between an upper side in the housing 10 and a lower portion of the water tank. That is, the suspension device 20 is one end of the suspension rod made of iron wire is fixed to the housing 10, the other end is provided with a damper 21 is connected to the outer lower end of the water tank (11). In this case, a damper spring (not shown) and a damper rubber (not shown) are provided in the damper 21 to absorb vibrations generated from the water tank 11.

Inside the water tank 11, the upper side is opened, and a cylindrical washing tank 12 in which a plurality of dehydration holes (not shown) are formed is rotatably installed. In the center of the washing tank 12, a disk-shaped pulsator 13 for forming a washing water flow is provided, and a driving unit having a motor 51 rotating forward and reverse in the lower portion of the washing tank 12 of the water tank 11 ( 50) is provided.

The drive unit 50 includes a motor 51 installed on one side of the bottom surface of the water tank 11, a clutch 52 for selectively transmitting the driving force of the motor 51 to the pulsator 13 and the washing tank 12, It consists of a pulley 53 and a belt 54 which mediate power transmission between the motor 51 and the clutch 52.

The lower cover 40 coupled to the lower portion of the housing 10 is a plastic injection molding forming a lower side and a lower surface of the washing machine, and a support device 100 for attenuating vibration while supporting the washing machine at the corner of the lower cover 40. ) Is provided. That is, the support device 100 is in close contact with the ground on which the washing machine is installed to prevent the washing and support of the washing machine, and at the same time, attenuates vibration generated by the rotation of the washing tank 12 and the pulsator 13 during washing or dehydration administration. give.

As shown in FIG. 3, the support device 100 has a cylindrical case 110 having an empty inside and an open top, and a leg guide 150 installed in the case 110 and sliding up and down. ). In addition, a cap 120 covering the upper opening of the case 110 is installed at an upper portion of the case 110, and the dustproof means 200 elastically supports the leg guide 150 downward in the case 110. Anti-vibration rubber 210 and anti-vibration spring 220 is installed. In addition, the leg guide 150 inside the case 110 is connected to the leg portion 140 for supporting the washing machine, the leg portion 140 is a screw rod 141 extending through the lower cover 40 to the outside ), And the support rubber 142 of the lower end of the screw rod 141.

At this time, the case 110 is fixed to the inner surface of the lower cover 40 so that the lower cover 40 is not exposed to the outside. To this end, a coupling pipe 111 penetrating the installation hole 41 of the lower cover 40 is integrally formed with the case 110 at a lower end of the case 110, and a coupling pipe penetrating the lower cover 40 ( An external thread 112 for fastening the nut 130 is formed on the outer surface of the 111. That is, the case 110 is fitted in the state in which the coupling pipe 111 penetrates the installation hole 41, and then the nut 130 is fastened to the male screw 112, thereby being firmly fixed to the inner surface of the lower cover 40.

Leg guide 150 inside the case 110 has a female thread formed on the inner surface so as to be engaged with the screw rod 141 entered into the case 110 through the coupling pipe 111 and a tubular shape having a predetermined length. Control sphere 151, and a disk-shaped flange 152 coupled to the lower end of the adjustment sphere 151. At this time, the lower end of the adjustment opening 151 is coupled to the center of the flange 152, the outer peripheral surface of the flange 152 is configured to be in contact with the inner surface of the case 110 to slide up and down.

The anti-vibration rubber 210 is provided in a ring shape in which the center portion is fitted to the control opening 151 and seated on the flange 152 upper surface of the leg guide 150, and has a predetermined thickness to attenuate vibration by its elasticity. It is configured to be. In addition, the anti-vibration rubber 210 is configured such that the outer peripheral surface is in close contact with the inner surface of the case 110 to attenuate vibration by friction with the inner surface of the case 110.

The anti-vibration spring 220 is supported on one end of the anti-vibration rubber 210 and the other end is supported on the inner surface of the cap 120 covering the upper part of the case 110 to attenuate vibration. At this time, between the lower end of the anti-vibration spring 220 and the top surface of the anti-vibration rubber 210, a spring guide 160 for guiding the vertical movement of the anti-vibration spring 220 is installed. The spring guide 160 has a groove for accommodating a portion of the bottom of the anti-vibration spring 220 to stably support the anti-vibration spring 220, and the inner side of the spring guide 160 is a leg guide for smooth operation of the anti-vibration spring 220. Interposed on the outer surface of the control opening 151 of 150, the outer surface is slidably supported by the inner surface of the case 110.

And the inner surface of the cap 120 is provided with a tubular control sphere guide 121 for supporting the outer surface of the adjustment sphere 151 so that the vertical movement of the leg guide 150 smoothly. That is, the leg guide 150 is supported by the lower end is supported on the inner surface of the case 110 through the outer surface of the flange 152 and the upper end of the control opening 151 is fitted to the control guide 121 to perform the vertical movement.

In addition, the upper end is fastened to the female screw of the adjustment opening 151, the screw rod 141 is fastened to the control opening 151 of the leg guide 150, the outer surface is supported so as to slide on the inner surface of the coupling pipe 111 It is installed to move up and down. In other words, the screw rod 141 is to support the washing machine, as well as tighten or loosen the height can be adjusted to facilitate the horizontal adjustment of the washing machine. In addition, the support rubber 142 at the bottom of the screw rod 141 is made of butyl rubber having good dust and adhesion so as not to slip from the ground while absorbing vibration generated by the driving of the washing machine. Butyl rubber is a copolymer of isobutane, which is oxygen and ozone resistant, has excellent heat and chemical resistance, and has a dustproof property, and thus is widely used as a dustproof material.

When assembling the washing machine support device 100 having such a configuration, the case 110 and the coupling pipe 111 are inserted into the installation hole 41 provided in the lower cover 40, and the coupling pipe from the outside of the lower cover 40. The lower cover 40 is coupled by fastening the nut 130 to the male screw 112 of the 111. Then, after inserting the screw rod 141 of the leg portion 140 to the lower side of the coupling pipe 111, the leg guide 150 is inserted into the upper side of the case 110 to adjust the opening 151 of the leg guide 150 ) And screw rod 141. At this time, the height of the washing machine is set according to the fastening position of the screw rod 141 and the adjusting opening 151, and the horizontal adjustment of the washing machine is performed.

Insert the dustproof rubber 210 to the outside of the control mechanism 151 of the leg guide 150 in the state set as the height of the leg 140 and the leg guide 150, the upper side of the dustproof rubber 210 Install the spring guide 160. In addition, an anti-vibration spring 220 is installed on the upper side of the spring guide 160, and the anti-vibration spring 220 is supported by coupling the cap 120 to the opened upper side of the case 110. At this time, the upper end of the adjusting opening 151 is supported in the inserted state of the adjusting guide 121 to be able to move.

The following describes the operation of the washing machine to which such a washing machine support device is applied.

When the motor 51 of the driving unit 50 is driven at the time of washing or dehydrating, the washing tank 12 and the pulsator 13 are rotated to generate vibration. At this time, the vibration is attenuated through the suspension device 20 connecting the housing 10 and the water tank 11, but a part of the vibration is transmitted to the housing 10.

In addition, the vibration transmitted to the housing 10 is transmitted to the support device 100 installed in the lower cover 40. The vibration transmitted to the support device 100 is attenuated by the dustproof means 200 provided in the case 110. In more detail, the damping of the vibration is made through the anti-vibration rubber 210 and the anti-vibration spring 220 inside the case 110, the anti-vibration rubber 210 is a sliding motion up and down inside the case 110. While causing friction with the inner surface of the case 110 and at the same time absorb vibration by its elasticity. And the anti-vibration spring 220 absorbs vibration while repeating compression and expansion.

On the other hand, when the weight of the washing machine is reduced or increased due to the replacement of the internal components of the washing machine, and when the washing machine is downsized or enlarged, the frequency of the washing machine is changed. In this case, the dustproof means 200 installed inside the case 110. ) Can be replaced or added to avoid the vibration frequency of the washing machine. That is, after removing the cap 120 from the case 110, the spring constant is replaced with a high or low anti-vibration spring 220, or adjust the elasticity of the anti-vibration spring 220 in use. In addition, by replacing the anti-vibration rubber 210 with a thicker or thinner, or by using another anti-vibration rubber 210 in addition to the anti-vibration rubber 210 in use to vary the friction area with the inner surface of the case 110. Can be taken. That is, the support device 100 according to the present invention can adjust the attenuation ability appropriately according to the vibration frequency change in such an easy way.

As described in detail above, the washing machine supporting apparatus according to the present invention adjusts or replaces the thickness of the anti-vibration rubber and the constant of the anti-vibration spring provided inside the supporting apparatus when the washing machine is miniaturized or enlarged to change the vibration frequency. By avoiding the vibration frequency there is an advantage that can easily attenuate the vibration of the washing machine.

Claims (1)

In the washing machine having a lower cover 40 provided in the lower portion of the housing 10, and a support device for supporting the lower cover 40 and attenuates vibration of the washing machine, the support device 100 is the lower cover The lower case is fixed to the inner side of the 40 and the upper case of the hollow case 110, the leg guide 150 is installed to be slidable up and down inside the case 110, the case of the case 110 Cap 120 covering the upper opening, the dustproof spring 220 is installed in the case 110 to support the leg guide 150 in the downward direction, the lower end of the dust-proof spring 220 and the leg guide ( 150 is disposed between the outer circumferential surface is in close contact with the inner surface of the case 110 to cause a friction force, the anti-vibration rubber 210, the upper end is entered into the case 110 and screwed with the rag guide 150 The lower end penetrates the lower cover 40. Screw rod 141 extending to the outside, the support device for a washing machine comprising a support rubber 142 coupled to the lower end of the screw rod (141).

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