KR20110133992A - Drum washing machine - Google Patents

Abstract

PURPOSE: A drum washing machine is provided to block the washing water from being flown into the operation unit by a flow preventing rib between a spider and a tub. CONSTITUTION: A tub is prepared inside a cabinet. A drum is prepared inside the tub to be rotatable. A spider(104) is prepared in the rear wall unit of the drum. A shaft is combined with the spider. Bearings(101,102) supports the shaft. A bearing housing(103) supports the bearing. A inflow preventing rib is located between the spider and the tub. The inflow preventing rib prevents washing water from being flown into the shaft.

Description

Drum Washing Machine {DRUM WASHING MACHINE}

The present invention relates to a drum washing machine, and more particularly, to a drum washing machine that prevents washing water from flowing into a bearing and suppresses a decrease in durability of the driving unit.

The washing machine is mainly driven by the electric motor, and the washing, rinsing, and dehydration processes are carried out to remove the dirt on the clothes by using the action of detergent and water. Its components consist of a motor, a power unit, a mechanical unit that delivers energy to the laundry, a control unit that regulates the washing process, and a water supply and drainage system that puts water in and out.

According to the washing method, the washing machine is classified into an agitator type, a pulsator type, and a drum type.

Stirring type is a method of washing by rotating the wing-shaped stirrer to the left and right in the center of the washing tank, Wakwon type is a method of washing with water generated by rotating the disk-shaped pulsator, drum type is formed with several protrusions Put the laundry, water and detergent inside the drum, and rotate it slowly on the horizontal axis, so the laundry is lifted up by the protrusion and washed by the falling impact.

Drum-type laundry has little damage, and has the advantage of using less water, the trend is increasing in recent years.

The above technical configuration is a background art for helping understanding of the present invention, and does not mean a conventional technology well known in the art.

In the conventional drum washing machine, washing water introduced between the spider and the tub rear wall part penetrates to a driving part such as a bearing, thereby deteriorating durability of the driving part by the washing water.

Therefore, there is a need for improvement.

The present invention has been made in order to improve the above problems, an object of the present invention is to provide a drum washing machine that can prevent the wash water from flowing into the bearing to suppress the durability of the drive unit.

Drum washing machine according to an aspect of the present invention comprises: a cabinet; A tub provided in the cabinet and configured to wash water; A drum rotatably provided inside the tub, in which laundry is stored; A spider provided on the rear wall of the drum; A shaft coupled to the spider and transmitting a driving force to the spider; A bearing for axially supporting the shaft such that the shaft is rotated; A bearing housing supporting the bearing and disposed at the rear wall of the tub; And an inflow prevention rib positioned between the spider and the tub to prevent washing water from flowing into the shaft.

Preferably, the inflow preventing ribs are formed such that one end thereof is connected to the rear wall portion of the tub and the other end thereof faces the spider.

More preferably, the inflow preventing ribs are formed integrally with the tub.

More preferably, the inflow preventing rib is made of the same material as the tub.

More preferably, the inflow preventing rib is spaced apart from the spider so as not to contact the spider when the spider rotates.

Preferably, the sealing member further includes a sealing member positioned between the inflow preventing rib and the shaft and formed in a ring shape to surround the shaft to block washing water from flowing into the shaft.

More preferably, the sealing member is formed in a cross-section "C" shape, one end is in close contact with the tub and the other end is in close contact with the outer peripheral surface of the shaft.

Drum washing machine according to another aspect of the present invention comprises: a cabinet; A tub provided in the cabinet and configured to wash water; A drum rotatably provided inside the tub, in which laundry is stored; A spider provided on the rear wall of the drum; A shaft coupled to the spider and transmitting a driving force to the spider; A bearing for axially supporting the shaft such that the shaft is rotated; A bearing housing supporting the bearing and disposed at the rear wall of the tub; And an inflow preventing rib positioned between the spider and the tub to prevent washing water from flowing into the bearing.

Preferably, the sealing member further comprises a sealing member positioned between the inflow preventing rib and the shaft and formed in a ring shape to surround the shaft, and disposed in front of the bearing to block washing water from flowing into the bearing.

According to the drum washing machine according to the present invention, washing water can be prevented from flowing into the driving unit by the inflow preventing ribs located between the spider and the tub, and the durability of the driving unit can be reduced.

In addition, according to the drum washing machine according to the present invention, the sealing member disposed to be in close contact with the tub and the shaft can block the washing water from flowing into the driving unit, thereby reducing the durability of the driving unit.

1 is a cross-sectional view of a drum washing machine according to an embodiment of the present invention.
2 is a cross-sectional view schematically showing a bearing housing around a drum washing machine according to an embodiment of the present invention.
3 is a partially enlarged view of FIG. 2.

Hereinafter, a drum washing machine according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or custom. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a cross-sectional view of a drum washing machine according to an embodiment of the present invention, Figure 2 is a cross-sectional view schematically showing the surroundings of the bearing housing of the drum washing machine according to an embodiment of the present invention, Figure 3 is a partially enlarged view of FIG. to be.

1 to 3, the drum washing machine 1 includes a cabinet 10, a tub 20, a drum 30, a motor 40, a shaft 40a, a spring 50, a damper 60, And a support leg 70.

The cabinet 10 forms the outline of the drum washing machine 1. The front cabinet 90 constituting the front of the cabinet 10 is formed with a laundry access hole (not shown) through which the laundry is entered, and the door 11 selectively opens and closes the laundry entrance hole.

On the upper side of the front cabinet 90 is disposed a front panel 80 in which an operation button (not shown) for selecting washing conditions is arranged.

Tub 20 is installed in the cabinet 10 is the wash water is fresh. Tub 20 is made of a hollow cylindrical shape lying sideways, the opening hole (not shown) is formed behind the laundry access hole.

The upper portion of the tub 20 is provided with a water supply device 21 for supplying the wash water into the tub 20 and a detergent housing 22 for supplying detergent. The drum 30 is rotatably disposed in the tub 20.

The drum 30 is rotatably provided in the tub 20 to accommodate laundry. Like the tub 20, the drum 30 has a hollow cylindrical shape lying on its side, and an opening hole (not shown) is formed at the rear of the laundry access hole.

The drum 30 is provided with a through hole (not shown) in the side so that the wash water freshened in the tub 20 can enter and exit, and a lifter 31 is mounted on the inner circumferential surface thereof.

The motor 40 is installed on the rear wall of the tub 20 to rotate the drum 30. The motor 40 transmits the driving force generated by the shaft 40a connected to the rear side of the drum 30 through the tub 20 to the drum 30.

The shaft 40a is axially connected to the drum 30 to transmit the driving force of the motor 40 to the drum 30 through the spider 104. The shaft 40a has a rear end coupled to the rotor (not shown) by a fastening member, and the front end coupled to the spider 104 provided at the rear wall of the drum.

The spring 50 absorbs the vibration of the tub 20 generated during the washing stroke. One side of the spring 50 is coupled to the upper portion of the tub 20, the other side is coupled to the upper cabinet of the cabinet 10. One spring 50 is provided at each of the front and rear portions of the tub 20 to absorb vibration generated by the left and right up and down flow of the tub 20.

Damper 60 attenuates the vibration of the tub 20 generated during the washing stroke with the spring 50, one side of the damper 60 is coupled to the lower portion of the tub 20, the other side of the cabinet 10 It is combined with the cabinet.

The lifter 31 is formed to face the center of the drum 30 on the inner circumferential surface of the drum 30. The lifter 31 lifts laundry stored in the drum 30 by the rotation of the drum 30.

The support leg 70 is formed below the cabinet 10 to support the drum washing machine 1. According to the present embodiment, the support leg 70 is disposed at each corner portion of the drum washing machine 1 formed in the shape of a square column.

The drum washing machine 1 further includes a bearing 101, 102, a bearing housing 103, a spider 104, a sealing member 110, and an inflow preventing rib 120.

The bearing housing 103 is disposed on the rear wall portion 20a of the tub 20. The bearing housings 103 are respectively installed on the outer circumferential surfaces of the front and rear ends of the shaft 40a to support the front bearing 101 and the rear bearing 102, which are axially supported so that the shaft 40a is rotated.

The bearing housing 103 is made of a metal material, and is formed to be integral with the tub 20 by insert injection during injection molding of the tub 20 which is a plastic material. The bearing housing 103 may be made of an aluminum alloy, and in this case, there is no thermal deformation even at a high temperature, so that the bearing housing 103 may be applied to a drum washing machine having a drying stroke.

Spider 104 is provided in the center of the rear wall of the drum 30 is coupled to the front end of the shaft 40a. The spider 104 serves to couple one end of the shaft 40a and to reinforce the strength of the rear wall of the drum 30.

The inflow preventing rib 120 is located between the spider 104 and the tub 20, specifically, the tub rear wall portion 20a to prevent washing water from flowing into the shaft 40a.

The inflow prevention rib 120 is for preventing the durability of the driving unit such as the motor 40 and the shaft 40a caused by the washing water flowing into the shaft 40a during the washing operation such as washing and dehydration. The upper space is closed so that the washing water does not flow into the shaft 40a through the space between the 20a and the spider 104.

The inflow preventing rib 120 is directly connected to the rear wall portion 20a of one end such that there is no gap between the inflow preventing rib 120 and the tub rear wall portion 20a.

Inflow preventing rib 120 may be formed integrally with the tub rear wall portion (20a). In this case, the gap between the inflow preventing rib 120 and the tub rear wall portion 20a can be eliminated at the source, so that the wash water flows into the shaft 40a through the inflow preventing rib 120 and the tub rear wall portion 20a. Can be completely blocked

Inflow preventing rib 120 may be made of a plastic material that is a material forming the tub (20). Since the inflow prevention rib 120 is made of the same material as the tub 20, the inflow prevention rib 120 protrudes toward the spider 104 from the front of the rear wall portion 20a of the tub 20 when the tub 20 is manufactured. It can form by making it. Accordingly, there is no need to add a separate process to form the inflow preventing rib 120.

The inflow preventing rib 120 is formed such that the other end thereof is opposed to the spider 104. The inflow preventing rib 120 is spaced apart from the spider 104 such that the inflow preventing rib 120 does not come into contact with the spider 104 when the spider 104 is rotated by the driving force transmitted by the shaft 40a.

Since the separation between the inflow prevention ribs 120 and the spider 104 is to prevent the rotation of the spider 104 by the contact with the inflow prevention ribs 120, it is as close as possible to the line not in contact with the spider 104. Is placed. As a result, the wash water introduced through the gap between the inflow preventing rib 120 and the spider 104 may be minimized.

The sealing member 110 is formed to surround the outer circumferential surface of the shaft 40a to block the washing water from flowing into the shaft 40a. In this embodiment, the sealing member 110 is formed in a ring shape and the shaft 40a is located in the central space.

The sealing member 110 is located between the inflow preventing rib 120 and the shaft 40a. That is, the inflow preventing rib 120 is formed in a ring shape to surround the sealing member 110 at the outside of the sealing member 110.

The sealing member 110 is formed in a cross-section "c" shape. The outer end of one end of the sealing member 110 is in close contact with the tub rear wall portion 20a, and the inner end of the other end is in close contact with the outer circumferential surface of the shaft 40a.

As such, the sealing member 110 has surface contact at the outer circumferential surface of the tub rear wall portion 20a and the shaft 40a and the outer and inner ends, and the wash water flows into the shaft 40a through the sealing member 110. Can be blocked.

According to another embodiment of the present invention, the inflow preventing rib 120 is located between the spider 104 and the tub 20, specifically, the tub rear wall portion 20a to prevent the washing water from flowing into the front bearing 101. do.

The inflow prevention rib 120 is a space between the tub rear wall portion 20a and the spider 104 in order to prevent durability degradation of the driving unit caused by the washing water flowing into the front bearing 101 during the washing operation such as washing and dehydration. The upper space is closed to prevent the washing water from flowing through.

The sealing member 110 is formed to surround the outer circumferential surface of the shaft 40a to block the washing water from flowing into the front bearing 101. In this embodiment, the sealing member 110 is formed in a ring shape and the shaft 40a is located in the central space.

The sealing member 110 is located between the inflow preventing rib 120 and the shaft 40a and is disposed in front of the front bearing 101.

Sealing member 110 is formed in a cross-section "c" shape, the concave portion is disposed so as to face the front bearing (101). Since the outer end of one end of the sealing member 110 is in close contact with the tub rear wall portion 20a and the inner end of the other end is in close contact with the outer circumferential surface of the shaft 40a, the wash water passes through the sealing member 110 and the front bearing 101. ) Can be blocked.

Hereinafter will be described the operation principle of the drum washing machine according to an embodiment of the present invention.

Washing water may be introduced between the spider 104 and the tub rear wall portion 20a during the washing operation such as washing and dehydration. The washing water may be primarily provided by the shaft 40a or the front bearing by the inflow preventing ribs 120. Entry into 101 is prevented.

The inflow preventing rib 120 is directly connected with the spider 104 at one end thereof and is directly connected to the spider 104 at the other end without interfering with the rotation of the spider 104. The washing water is prevented from entering the shaft 40a or the front bearing 101 through the space between the tub rear wall portions 20a.

In addition, since the sealing member 110 having one end is in close contact with the tub rear wall 20a and the other end is in close contact with the outer circumferential surface of the shaft 40a is provided inside the inflow preventing rib 120, the shaft of washing water 40a or The inflow into the front bearing 101 can be blocked at source.

Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary and will be understood by those skilled in the art to which various modifications and equivalent other embodiments are possible. .

In addition, the drum washing machine has been described as an example, but the technical idea of the present invention may be applied to other devices other than the drum washing machine.

Therefore, the true technical protection scope of the present invention will be defined by the claims below.

20a: tub rear wall 30: drum
40a: shaft 101: front bearing
103: bearing housing 104: spider
110: sealing member 120: inflow prevention rib

Claims (9)

cabinet;
A tub provided in the cabinet and configured to wash water;
A drum rotatably provided inside the tub, in which laundry is stored;
A spider provided on the rear wall of the drum;
A shaft coupled to the spider and transmitting a driving force to the spider;
A bearing for axially supporting the shaft such that the shaft is rotated;
A bearing housing supporting the bearing and disposed at the rear wall of the tub; And
A drum washing machine, comprising: an inflow prevention rib positioned between the spider and the tub to prevent washing water from flowing into the shaft.
The method of claim 1,
One end of the anti-flow rib is connected to the tub rear wall portion, the other end drum washing machine, characterized in that formed to face the spider.
The method of claim 2,
The inflow prevention ribs drum washing machine, characterized in that formed integrally with the tub.
The method of claim 3,
The inflow preventing ribs drum washing machine, characterized in that made of the same material as the tub.
The method of claim 4, wherein
The inflow preventing ribs are drum washing machine, characterized in that spaced apart from the spider so as not to contact the spider when the spider rotates.
The method of claim 1,
And a sealing member disposed between the inflow preventing rib and the shaft and formed in a ring shape to surround the shaft to block washing water from flowing into the shaft.
The method of claim 6,
The sealing member is a drum washing machine, characterized in that the cross section is formed in the "c" shape, one end is in close contact with the tub and the other end is in close contact with the outer peripheral surface of the shaft.
cabinet;
A tub provided in the cabinet and configured to wash water;
A drum rotatably provided inside the tub, in which laundry is stored;
A spider provided on the rear wall of the drum;
A shaft coupled to the spider and transmitting a driving force to the spider;
A bearing for axially supporting the shaft such that the shaft is rotated;
A bearing housing supporting the bearing and disposed at the rear wall of the tub; And
Drum washing machine characterized in that it is located between the spider and the tub to prevent the wash water from flowing into the bearing.
The method of claim 8,
A drum disposed between the inflow preventing rib and the shaft and formed in a ring shape to surround the shaft and disposed in front of the bearing to block washing water from flowing into the bearing; washer.

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