KR100531319B1 - drum type washing machine - Google Patents

Abstract

The present invention relates to a drum washing machine, and more particularly, to a drum washing machine that can relatively increase the capacity of the drum and reduce vibration.

To this end, the present invention, the cabinet 51; A tub 53 fixed to a part of the cabinet; A drum (54) rotatably installed in the tub; A bearing housing (55) disposed in the rear of the tub so as to be movable relative to the tub and supporting the drum; A driving device 57 fixed to the bearing housing and installed to rotate the drum 54; A first suspension device 61 installed to support the bearing housing 55 to absorb the up and down vibration of the drum 54; And, to support the bearing housing 55 provides a drum washing machine comprising a second suspension device 62: which is installed to prevent the drum from tilting.

Description

Drum washing machine

The present invention relates to a drum washing machine, and more particularly, to a drum washing machine that can increase the capacity of the drum and reduce vibration.

In general, the drum washing machine is a device for washing laundry by rotating the drum by the driving force of the motor in a state in which detergent, washing water and laundry are put in the drum. Such a drum washing machine has the advantage that the damage of the laundry is less and the laundry is not tangled well, knocking and rubbing the laundry effect.

Hereinafter, a conventional drum washing machine will be described with reference to FIGS. 1 and 2.

1 is a block diagram showing a configuration of a conventional drum washing machine, Figure 2 is a cross-sectional view showing a damper for supporting the tub of Figure 1.

Referring to FIG. 1, the drum washing machine includes a cabinet 1, a door 2, a tub 3, a drum 4, a bearing housing 5, a washing shaft 6, a driving device 7, It comprises a damper 8 and a suspension spring (9).

The laundry inlet is formed on the front surface of the cabinet 1, and the door 2 is installed at the laundry inlet so as to be opened and closed.

A tub 3 is installed inside the cabinet 1 to store wash water.

At this time, the bearing housing 5 is fixed to the rear end of the tub 3, and the driving device 7 is fixed to the bearing housing. In addition, the driving device is connected to the washing shaft (6), the drum (4) is rotatably installed on the washing shaft (6). At this time, the washing shaft is supported by a bearing installed in the bearing housing (5).

The driving device may be an indirect driving method for rotating the drum by transmitting the driving force generated from the motor to the washing shaft by a belt, or a direct driving method for rotating the drum by directly transmitting the driving force generated from the motor to the washing shaft. You can also apply.

In addition, the laundry inlet and the opening of the tub are connected by the bellows 3a. These bellows are installed along the open edge of the tub. Accordingly, the gap between the laundry inlet and the opening of the tub 3 is sealed.

The tub 3 is elastically supported by a damper 8 and a suspension spring 9.

2, the damper 8 is installed to support the lower portion of the tub (3). This damper 8 comprises a cylinder 8a, a piston 8b and a friction ring 8c.

A piston 8b is inserted into the cylinder 8a. At this time, the upper end of the cylinder (8a) is installed in the tub (3), the lower end of the piston (8b) is installed in the base (1a) forming the lower surface of the cabinet.

At one end of the piston 8b, a friction ring 9 is provided. The friction ring absorbs vibrations by friction with the cylinder 8a.

In addition, the suspension spring 9 is installed to support the upper portion of the tub (3). At this time, the suspension spring 9 has a structure in which an upper end thereof is fixed to the cabinet 1 and a lower end thereof is fixed to the tub 3.

The drum washing machine configured as described above has the following problems.

First, a bearing housing is fixed to the tub, a driving device is fixed to the bearing housing, and a drum is rotatably supported by the driving device. As such, since the drum is supported by the tub, the vibration of the driving device and the drum is transmitted to the cabinet through the tub during washing or dehydration stroke, and thus a noise caused by the vibration is greatly generated.

Second, in order to prevent the tub from colliding with the cabinet when vibration of the tub occurs, the outer surface of the tub and the cabinet should be spaced apart by a predetermined interval. Therefore, there is a problem that the capacity of the drum is reduced or the size of the cabinet is increased as much as the left and right spaces of the tub and the cabinet.

Third, the tub has a structure that is supported only by the damper and suspension spring, so that a lot of laundry is contained in the drum, and the tub supporting the drum is also inclined. Therefore, there is a problem that the vibration becomes larger when the drum is rotated.

In order to solve the above-mentioned problems, an object of the present invention is to provide a drum washing machine that can relatively increase the capacity of the drum and reduce vibration.

In order to achieve the above object, according to the present invention, a cabinet; A tub fixed to a part of the cabinet; A drum rotatably installed in the tub; A bearing housing disposed behind the tub so as to be movable relative to the tub to support the drum; A driving device fixed to the bearing housing and installed to rotate the drum; A first suspension device installed to support the bearing housing to absorb the up and down vibration of the drum; And, to support the bearing housing provides a drum washing machine comprising a second suspension: which is installed to prevent the drum from tilting.

The first suspension device is installed to support the lower part of the bearing housing, and the second suspension device is installed to support the upper part of the bearing housing to the cabinet.

In this case, the first suspension device is composed of a damper or spring and the second suspension device is composed of a spring.

The first suspension device is preferably installed on both sides of the bearing housing. In addition, the second suspension device is preferably installed in front and rear of the bearing housing.

On the other hand, both the first suspension device and the second suspension device may be installed to support the lower portion of the bearing housing.

In this case, the first suspension device is composed of a damper or spring and the second suspension device is composed of a damper or spring.

The second suspension device is preferably spaced forward or rearward from the first suspension device and inclined in the front-rear direction.

Hereinafter, a first embodiment of a drum washing machine according to the present invention will be described with reference to FIGS. 3 and 4.

Figure 3 is a block diagram showing a first embodiment of a drum washing machine according to the present invention, Figure 4 is a block diagram showing the drum washing machine of Figure 3 from the front.

3 and 4, the drum washing machine includes a cabinet 51, a door 52, a tub 53, a drum 54, a bearing housing 55, a driving device 57, and first and second parts. It is configured to include the suspension (61, 62).

The laundry inlet is formed on the front surface of the cabinet 51, and the door 52 is installed to be opened and closed at the laundry inlet.

A tub 53 is installed in the cabinet 51, and a part of the tub 53 is fixed to the cabinet 51. For example, one open end of the tub is fixed to the cabinet. Alternatively, the outer surface of the tub may be fixed to the cabinet. One end of the tub is in communication with the laundry inlet.

The drum 54 is rotatably installed in the tub 53. The drum 54 is formed with a plurality of through holes so that the wash water filled in the tub 53 flows out.

The bearing housing 55 is fixed to the rear of the tub 53 so as to be relatively movable by the tub to support the drum. In this case, the bearing housing 55 extends toward the door 52 and is spaced apart from the tub 53 at a predetermined interval.

For example, as illustrated in FIG. 3, the bearing housing 55 has a structure in which a portion located at the rear side of the tub 53 is formed in a disc shape, and a predetermined number of arms extends from the disc shape to the front side. By reducing the space between the tub and the cabinet by the structure of the bearing housing, the capacity of the drum can be made relatively large. Accordingly, the width of the washing machine can be reduced.

In addition, it is understood that the bearing housing may be formed in a tubular shape so as to cover a predetermined rear portion of the tub. This cylindrical bearing housing reduces the space between the tub and the cabinet relatively less than that of the arm described above.

The driving device 57 is installed in the bearing housing 55. A washing shaft 56 is connected to the drive device 57, and a drum 54 is connected to the washing shaft 56.

In addition, a gasket 53a is installed on the rear surface of the tub 53 into which the washing shaft 56 is inserted to seal the gap.

Accordingly, the drum 54 has a structure supported by the bearing shaft 55 by the washing shaft 56. This washing shaft is rotatably installed by the bearing of the bearing housing.

In this case, the driving device 57 may apply both a direct drive method and an indirect drive method.

In addition, the washing shaft 56 is provided with a reduction device such as a coupling (coupling). By this reduction device, the drum 54 can be rotated at high speed and low speed.

First and second suspension devices 61 and 62 are installed in the bearing housing.

The first suspension device 61 is installed to support the bearing housing 55 to absorb the up and down vibration of the drum 53. The first suspension device 61 is installed to support the lower portion of the bearing housing 55. For example, the first suspension device 61 is installed on both sides of the bearing housing, respectively.

The second suspension device 62 is installed to support the bearing housing 55 to prevent the drum 54 from tilting. The second suspension device 62 is installed to support the upper portion of the bearing housing 55 to the cabinet 51. For example, the second suspension device 62 is provided at the front and rear sides of the bearing housing, respectively. In addition, although not shown, the second suspension device may be installed on both sides of the bearing housing in front and rear sides, respectively.

The first and second suspension devices 61 and 62 are preferably installed to be biased toward the rear side of the bearing housing 55. This is because the weight of the drive is significantly heavier than other components.

For example, the first suspension device 61 may be installed at both sides of the center of gravity G of the drum rotating body including the drum 54, the bearing housing 55, and the driving device 57. As shown in FIG. 3, the first suspension device 61 is provided with a pair so as to support both sides of the bearing housing 55. Of course, two or more pairs may be installed in consideration of the size and weight of the drum rotating body and the damping force of the first suspension device 61.

In addition, it is also understood that the first suspension device 61 may be installed at a position spaced a predetermined distance to the front side with respect to the center of gravity (G) of the drum rotating body.

This is to minimize the inclination of the front of the drum 54 downward since the weight of the drive device 57 and the bearing housing 55 is relatively heavy compared to the drum 54. Moreover, it is also to minimize the inclination of the drum 54 when a large amount of laundry is put into the drum 54.

In this case, as shown in FIG. 3, the first suspension device 61 is configured by a combination of a damper and a spring 61c, and the second suspension device 62 is formed of a spring.

In addition, the first suspension device may be configured as a damper, and the second suspension device may be configured as a spring.

Here, the damper is composed of a cylinder 61a and a piston 61b inserted into the cylinder and damping by the frictional force with the cylinder.

For example, when the first suspension device is installed, the cylinder 61a is fixed to the base 51a, a piston 61b is inserted into the cylinder 61a, and the spring elastically supports the bearing housing 55. In addition, it is installed so as to surround the outer surface of the piston (61b). At this time, it is also understood that the spring may be installed to elastically support the piston inside the cylinder.

In another example in which the first suspension device is installed, the cylinder 61a is fixed to the bearing housing 55, and the piston 61b is fixed to the base 51a of the cabinet 51. It is also understood that the spring 61c may be installed to elastically support the lower end of the cylinder 61a and the upper surface of the base 51a.

It is more preferable that the first suspension device 61 is made to have an upper portion heavier than the lower portion so as to act as a parallel weight when the tub 53 vibrates.

For example, when the spring is installed on the upper side of the cylinder, the weight of the spring is made relatively heavy. In addition, when the cylinder is provided above the spring, the weight of the cylinder is made relatively heavy.

In addition, for example, the second suspension device 62 is installed on the front and rear sides of the bearing housing 55 in which the second suspension device is installed. In this case, it is preferable that the second suspension devices are inclined to the front and rear sides, respectively. As the second suspension device 62, a coil spring 61c is applied.

As the first and second suspension devices, it is also understood that suspension devices having various structures can be applied.

Next, a second embodiment of the drum washing machine will be described with reference to FIGS. 5 and 6. Since the structure of the second embodiment is similar to that of the first embodiment except for the first and second suspension devices, only the first and second suspension devices will be described below.

Figure 5 is a block diagram showing a second embodiment of the drum washing machine according to the present invention, Figure 6 is a block diagram showing the drum washing machine of Figure 5 from the front.

Referring to FIG. 5, both the first suspension device 71 and the second suspension device 72 are installed to support the lower portion of the bearing housing 55.

In this structure, since the upper arm of the bearing housing does not need to be provided as shown in FIG. 6, the space between the upper side of the tub and the upper surface of the cabinet can be reduced as well as the two side spaces of the tub. Accordingly, both the width and the height of the washing machine can be reduced.

In this case, the second suspension device 72 is installed to be spaced apart from the first suspension device in the front or rear by a predetermined distance. Such a second suspension device is preferably installed inclined forward and backward. Accordingly, the second suspension device absorbs vibration generated in the front and rear directions of the tub 53.

In addition, the first suspension device 71 is installed to be biased toward the rear side of the bearing housing 55.

For example, the first suspension device 71 is installed on both sides of the center of gravity (G) of the drum rotating body. It is also understood that the first suspension device may be provided with one pair or two or more pairs so as to support both sides of the bearing housing 55.

In addition, it is also understood that the first suspension device 71 may be installed at a position separated by a predetermined distance to the front side or the rear side with respect to the center of gravity G of the drum rotating body.

At this time, the first suspension device is composed of a damper, the second suspension device is composed of a spring.

In addition, the first suspension device may be a combination of a damper and a spring, the second suspension device may be composed of a spring.

In addition, both the first suspension device and the second suspension device may be configured of a spring.

In addition, the first suspension device may be composed of a damper, and the second suspension device may be composed of a damper and a spring.

Here, the damper is composed of a cylinder and a piston inserted into the cylinder to damp the action by the friction force with the cylinder.

For example, as shown in FIG. 5, the second suspension device 72 includes a cylinder 72a inclined toward the rear side of the bearing housing, a piston 72b inserted into the cylinder, and the like. And a spring 72c installed to surround the piston while elastically supporting the bearing housing.

At this time, the cylinder 72a is fixed to the base 51a, the piston 72b is fixed to the bearing housing 55, and the spring 72c is installed to support the upper end of the cylinder 72a.

In addition, the cylinder is fixed to the bearing housing, the piston is fixed to the base, the spring may be installed to support the lower end of the cylinder.

Here, it is also understood that the spring may be installed to elastically support the piston inside the cylinder.

The operation of the drum washing machine configured as described above will be described. Here, since the operation of the second embodiment is almost similar to that of the first embodiment, the operation of the first embodiment will be described.

When the user inserts laundry into the drum 54 and selects a predetermined stroke, the tub 53 is filled with the washing water at a predetermined level. When the wash water is filled to a predetermined level, the drum 54 is rotated as the driving device 57 is rotated.

In this case, since a part of the tub 53 is fixed to the cabinet 51 and the drum 54 is supported by the bearing housing 55, the drum 54 sags relatively less than before. .

In addition, since the drum 54 is supported by the bearing housing 55, vibration generated in the drum 54 and the driving device 57 when the drum 54 rotates is transmitted to the bearing housing 55. .

When vibration is transmitted to the bearing housing 55, the vibration is absorbed by the first and second suspension devices 61 and 62.

More specifically, the first suspension device 61 absorbs up and down vibrations (including left and right vibrations) of the drum rotating body, and at the same time, the second suspension device 62 prevents the front and rear vibrations of the drum rotating body. Absorb.

As such, the vibrations transmitted to the cabinet 51 during the stroke of the washing machine may be reduced by the action of the drum rotating body and the first and second suspension devices 61 and 62. This vibration reduction can reduce noise.

As described above, the drum washing machine according to the present invention has the following effects.

First, since the drum is supported by a bearing housing spaced from the tub, vibration generated by the drum and the drive is hardly transmitted to the tub. Therefore, as shown in FIGS. 4 and 6, the space between both sides of the tub and the cabinet can be made narrower than before. Thus, the volume of the washing machine can be reduced or the capacity of the drum can be relatively increased. . Furthermore, by forming an arm in the bearing housing, it is possible to form a narrower space between the tub and the cabinet.

Second, since the tub is fixed to the cabinet and the drum is supported by the bearing housing, the drum can be minimized from sagging down. Therefore, the noise generated when the drum and the tub collide when the drum rotates and the vibration generated by the drum can be significantly reduced.

Third, since one end of the tub is fixed to the cabinet, it is possible to increase the length of the front and rear sides of the tub by the space where the conventional gasket is installed.

1 is a block diagram showing a configuration of a conventional drum washing machine.

FIG. 2 is a cross-sectional view illustrating a damper supporting the tub of FIG. 1. FIG.

Figure 3 is a block diagram showing a first embodiment of a drum washing machine according to the present invention.

4 is a configuration diagram showing the drum washing machine of FIG.

Figure 5 is a block diagram showing a second embodiment of the drum washing machine according to the present invention.

6 is a configuration diagram showing the drum washing machine of FIG. 5 from the front;

Explanation of symbols on the main parts of the drawings

51: cabinet 51a: base

52: door 53: tub

53a: Gasket 54: Drum

55: bearing housing 56: washing shaft

57 drive device 61 first suspension device

61a: cylinder 61b: piston

61c: spring 62: second suspension

71; First suspension device 72: Second suspension device

72a: cylinder 72b: piston

72c: spring

Claims (13)

Cabinet; A tub fixed to a part of the cabinet; A drum rotatably installed in the tub; A bearing housing disposed behind the tub so as to be movable relative to the tub to support the drum; A driving device fixed to the bearing housing and installed to rotate the drum; A first suspension device installed to support the bearing housing to absorb the up and down vibration of the drum; And, And a second suspension device installed to support the bearing housing to prevent the drum from tilting. The method of claim 1, The first suspension device is installed to support the lower portion of the bearing housing, The second suspension device is a drum washing machine, characterized in that installed to support the upper portion of the bearing housing in the cabinet. The method of claim 2, The first suspension device is composed of a damper, the second suspension device is a drum washing machine, characterized in that composed of a spring. The method of claim 2, The first suspension device is a combination of a damper and a spring, the second suspension device is a drum washing machine, characterized in that composed of a spring. The method according to any one of claims 2 to 4, The first suspension device is a drum washing machine, characterized in that installed on both sides of the bearing housing. The method according to any one of claims 2 to 4, The second suspension device is a drum washing machine, characterized in that installed on the front and rear of the bearing housing. The method of claim 1, Both the first suspension device and the second suspension device is installed so as to support the lower portion of the bearing housing. The method of claim 7, wherein The second suspension device is a drum washing machine, characterized in that it is spaced forward or rearward from the first suspension device and inclined in the front-rear direction. The method of claim 8, The first suspension device is composed of a damper, the second suspension device is a drum washing machine, characterized in that composed of a spring. The method of claim 8, The first suspension device is a combination of a damper and a spring, the second suspension device is a drum washing machine, characterized in that composed of a spring. The method of claim 8, The first suspension device is composed of a spring, the second suspension device is a drum washing machine, characterized in that the damper and the spring is configured in combination. The method of claim 11, The first suspension device is composed of a damper, the second suspension device is a drum washing machine, characterized in that composed of a spring. The method according to any one of claims 7 to 12, The first suspension device is a drum washing machine, characterized in that installed on both sides of the bearing housing.