KR100710375B1 - Structure for driving unit in washing machine - Google Patents

Abstract

The present invention is to provide a drive unit structure of the washing machine to prevent the front bearing of the drive unit of the washing machine to slip against the shaft to reduce the wear and friction noise of the shaft as much as possible.

To this end, the present invention is connected to the drum shaft for transmitting a driving force; A front bearing and a rear bearing installed on outer peripheries of the shaft to support the shaft; A bushing installed at one side of the rear bearing to pressurize the rear bearing; A plurality of pressing members for preventing the inner ring of the front bearing from slipping with respect to the shaft; In addition, the fastening member for fixing the bushing to one side of the shaft and transmitting the pressing force to the pressing member: provides a drive unit structure of the washing machine comprising a.

Washing machine, drum washing machine, shaft, front bearing, pressing member, fastening member

Description

Structure for driving unit in washing machine

1 is a schematic view showing the configuration of a conventional drum washing machine

2 is a sectional view schematically showing main parts of a driving unit of a conventional drum washing machine.

3 is a sectional view schematically showing a structure of a driving unit of a drum washing machine according to an embodiment of the present invention;

Figure 4 is a schematic diagram showing a state in which the pressing member is installed on the shaft according to an embodiment of the present invention

FIG. 5 is a cross-sectional view illustrating the II of FIG. 4. FIG.

** Explanation of symbols for main parts of drawings **

6a: front bearing 6b: rear bearing

16b: bushing 100: shaft

300: pressing member 310: pressing unit

330: close contact 500: fastening member

510: body portion 530: press-fit portion

550: head

The present invention relates to a drum washing machine, and more particularly, to an improvement in the structure of the driving unit of the drum washing machine.

In general, the drum washing method of the washing machine is a method of washing by using the friction force of the rotating drum and the laundry by receiving the driving force of the motor in a state in which detergent, washing water and laundry are put into the drum, there is almost no damage to the laundry. , Laundry does not get tangled with each other, knocking and rubbing can have a washing effect.

1 is a vertical cross-sectional view showing the structure of a conventional drum washing machine, and FIG. 2 is a cross-sectional view illustrating main parts of a structure of a driving unit of a conventional drum washing machine, and a conventional drum washing machine is installed inside a cabinet 1 to form a tub ( 2: a tub), a drum (3: drum) installed inside the tub (2), and a driving unit (10) for rotating the drum (3).

As shown in FIG. 2, the driving unit 10 is axially connected to the drum 3 through the tub 2 to transfer a driving force of a motor (not shown) to the drum 3. And the front bearing 6a and the rear bearing 6b installed on the outer circumferential surfaces of both ends of the shaft 4 and the rear wall portion 200 of the tub 2 to mount the front / rear bearings 6a and 6b. A bearing housing 7 for supporting and an inner rotor (not shown) installed on an outer circumferential surface of the rear end of the shaft 4 and rotating together with the shaft 4 and constituting a motor together with a stator (not shown); Is done.

A bushing 16a is provided between the inner rotor and the rear bearing 6b coupled to the shaft 4 and between the rear bearing 6b and the fastening member 15a for the separation between the elements.

At this time, the rear bearing (6b) is pressed by the fastening member (15a) fastened to the fastening groove 401 formed in the rear end of the shaft 4 is configured to prevent the shaft departure by the bushing (16b) for supporting the inner ring do.

The conventional drum washing machine having such a configuration operates as follows.

After the laundry and detergent and the washing water are filled in the drum 3, when the power is applied to the stator of the driving unit 10, the rotor rotates. The rotation of the rotor causes the shaft 4 to rotate, and the shaft 4 rotates to rotate the drum 3.

Thus, the laundry contained in the drum 3 is washed by the washing water and the friction force with the drum 3.

However, the driving unit of such a conventional drum washing machine has the following problems.

Referring to the structure in which the shaft 4 of the driving unit of the conventional drum washing machine is coupled to and supported by the front / rear bearings 6a and 6b, as shown in FIG. 2, the inner ring of the rear bearing 6b is connected to the bushing 16b. The inner ring of the front bearing 6a is a structure in which a gap G is formed between the shaft 4 and the front bearing 6a without such a supporting structure, while being rotated integrally with the shaft 4 by the pressing force. Therefore, a phenomenon occurs when the inner ring of the front bearing 6a slips with respect to the shaft 4.

Therefore, the shaft 4 is in contact with the inner ring of the front bearing (6a) has a problem that wear occurs, and furthermore there was a problem that friction noise occurs.

The present invention is to solve the above problems, an object of the present invention is to prevent the sliding of the front bearing against the shaft of the drive unit of the washing machine drive unit structure of the washing machine to reduce the wear and friction noise of the shaft as much as possible It is intended to provide.

In order to achieve the above object, the present invention is connected to the drum shaft for transmitting a driving force; A front bearing and a rear bearing installed on outer peripheries of the shaft to support the shaft; A bushing installed at one side of the rear bearing to pressurize the rear bearing; A plurality of pressing members installed in a shaft portion in which the front bearing is installed to prevent the inner ring of the front bearing from slipping with respect to the shaft when the shaft rotates; In addition, the fastening member for fixing the bushing to one side of the shaft and transmitting the pressing force to the pressing member: provides a drive unit structure of the washing machine comprising a.

The shaft is formed in a hollow, it is preferable that the thread is formed on the inner circumferential surface so that the fastening member is fastened.

On the other hand, the pressing portion which is installed inside the shaft and receives the pressing force from the fastening member, is formed to extend from the pressing portion, and is installed to be in close contact with the inner ring of the front bearing, the pressing force received from the fastening member to the inner ring of the front bearing It can be made to include a close contact.

At this time, each pressing member may be disposed radially in a state that penetrates the shaft in the axial direction.

In addition, the fastening member is preferably formed to have a length to the position where the front bearing is installed past the rear bearing.

The fastening member forms an outer appearance, a body portion having a thread for fastening on the shaft, an indentation portion extending from one side of the body portion to transmit an urging force to the pressing member, and formed on the other side of the body portion of the bushing. It may be made including a head for pressing one side.

At this time, the press-fit portion is preferably formed in a wedge shape.

Therefore, the present invention can prevent the phenomenon that the inner ring of the front bearing slips with respect to the shaft by pressing the inner ring of the front bearing to be integrally rotated with the shaft by the pressure member provided connected to the shaft.

Hereinafter, the drive unit structure of the washing machine according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this case, the same configuration as the conventional embodiment of the present invention uses the same reference numerals and will not be described again.

3 is a cross-sectional view showing main parts of a structure of a driving unit of a drum washing machine according to an embodiment of the present invention, and FIG. 4 is a schematic view showing a state in which a pressing member is installed on a shaft according to an embodiment of the present invention. It is sectional drawing which shows II of FIG.

As shown in FIG. 3, the driving unit structure of the drum washing machine according to the embodiment of the present invention is connected to a drum to transmit a driving force, and the shaft 100 is installed on the outer circumference of both ends of the shaft 100. ) And a front bearing (6a) and a rear bearing (6b) supporting the bearing, a bearing housing (7) mounted on the rear wall portion 200 of the tub (2) to support the front and rear bearings (6a, 6b); And a bushing 16b installed at one side of the rear bearing 6b to pressurize the rear bearing 6b and a shaft 100 at which the front bearing 6a is installed to rotate the shaft 100. When the inner ring of the front bearing 6a is prevented from slipping with respect to the shaft 100, a plurality of pressing members 300 and the bushing 16b are fixed to one side of the shaft 100 and the pressing is performed. It may comprise a fastening member 500 for transmitting the pressing force to the member 300. All.

Here, the shaft 100 is formed in a hollow, it is preferable that a thread (not shown) is formed on the inner circumferential surface so that the fastening member 500 is fastened.

As shown in Figure 4 and 5, each pressing member 300 according to an embodiment of the present invention, for example, is installed in the shaft 100 is pressed to receive a pressing force from the fastening member 500 The contact portion 310 is formed to extend from the pressing portion 310 and is installed to be in close contact with the inner ring of the front bearing 6a so as to transmit the pressing force received from the fastening member to the inner ring of the front bearing 6a. 330 may be included.

At this time, each pressing member 300 is disposed radially in the state penetrating the circumferential surface of the shaft (100). Correspondingly, it is preferable that the through hole 120 is formed in the shaft 100 so that the pressing members 300 pass through the shaft 100.

On the other hand, according to the embodiment of the present invention, the fastening member 500 is preferably formed to have a length to the position where the front bearing 6a is installed past the rear bearing 6b.

For example, the fastening member 500 forms an appearance and is formed from a body portion 510 having a screw thread for fastening to the shaft 100, and is formed to extend from one side of the body portion 510 to the pressing member 300. It may include a pressing portion 530 for transmitting the pressing force to the head portion 550 is formed on the other side of the body portion 510 to press one side of the bushing (16b).

At this time, the press-fitting part 530 is preferably formed in a wedge shape, and correspondingly, the pressing part 310 of each pressurizing member 300 which is pressed by the press-fitting part 530 corresponds to the press-fitting part 530. More preferably, it is formed to be inclined in a corresponding shape.

This is to allow each press unit 310 to be easily pressurized in the process of pressing the press unit 530 to the press unit 310 of each press member 300.

The process of coupling the shaft 100 to each bearing of the washing machine driving unit having the structure as described above and the effects thereof will be described below.

First, each pressing member 300 is inserted into and fixed to each through hole 120 formed in the shaft 100.

Next, the shaft 100 is inserted into the front and rear bearings (6a, 6b) in a slide form.

At this time, the close contact portion 330 of each pressing member 300 is installed in close contact with the inner ring of the front bearing (6a).

Next, the bushing 16b is installed to be in contact with one side of the rear bearing 6b.

Next, the bushing 16b is fixed with the fastening member 500 that is a fastening member.

At this time, the fastening member 500 is fastened to the shaft 100 in a state passing through the bushing (16b).

At this time, while the fastening member 500 is fastened to the shaft 100, the pressing part 530 of the fastening member 500 presses the pressing part 310 of the pressing member 300, and the pressing part As the 310 is pressed, the close contact portion 330 is more closely fixed to the inner ring of the front bearing 6a by the pressing force of the press portion 310.

In addition, the head 550 of the fastening member 500 pressurizes the side surface of the bushing 16, and the bushing 16b presses the rear bearing 6b so that the shaft 100 and the rear bearing ( 6b) is in close contact.

Through such a series of processes, the pressing member 300 is to press the inner ring of the upper bearing (6a) in a state fixed to the shaft (100).

Therefore, when the shaft 100 is rotated, the pressing member 300 fixed to the shaft 100 rotates together with the shaft 100, and the pressing member 300 is in close contact with the pressing force 6a. Inner ring of the) is rotated together with the pressing member (300).

That is, the inner ring of the front bearing 6a can be prevented from slipping with respect to the shaft 100, thereby preventing friction between each other and further preventing friction noise.

So far, the present invention has been described with reference to the embodiments, and those skilled in the art to which the present invention pertains may implement the modified forms of embodiments within the essential technical scope of the present invention. Here, the essential technical scope of the present invention is shown in the claims, and the modified forms within the equivalent range will be construed as being included in the present invention.

The driving unit structure of the washing machine as described above has the following effects.

According to the present invention, the pressing member is provided on the shaft to be installed to press the inner ring of the front bearing, thereby preventing the sliding phenomenon caused by the rotation of the conventional shaft.

Therefore, it is possible to prevent a phenomenon in which the shaft, which has been caused by the phenomenon of sliding of the shaft, which is a conventional problem, and to reduce frictional noise.

Claims (7)

A shaft connected to the drum to transmit a driving force; A front bearing and a rear bearing installed on outer peripheries of the shaft to support the shaft; A bushing installed at one side of the rear bearing to pressurize the rear bearing; A plurality of pressing members installed in a shaft portion in which the front bearing is installed to prevent the inner ring of the front bearing from slipping with respect to the shaft when the shaft rotates; And, And a fastening member for fixing the bushing to one side of the shaft and transmitting a pressing force to the pressing member. The method of claim 1, The shaft is formed in a hollow, the inner peripheral surface of the drive unit structure of the washing machine, characterized in that the screw thread is formed so that the fastening member is fastened. The method of claim 1, The pressing member is A pressing part installed on the shaft and receiving a pressing force from the fastening member; And a close contact portion extending from the pressing portion and installed to be in close contact with the inner ring of the front bearing to transmit a pressing force received from the fastening member to the inner ring of the front bearing. The method of claim 3, wherein Each pressing member is radially disposed in a state passing through the shaft structure of the drive unit of the washing machine. The method according to any one of claims 1 to 4, The fastening member is The drive unit structure of the washing machine, characterized in that it is formed to have a length from the rear bearing to the position in which the front bearing is installed. The method of claim 5, The fastening member is A body part having a thread for forming an appearance and fastening to a shaft, An indentation part extending from one side of the body part to transmit a pressing force to the pressing member; The drive unit structure of the washing machine formed on the other side of the body portion comprising a head for pressing one side of the bushing. The method of claim 6, The press-fit portion of the drive unit structure of the washing machine, characterized in that formed in a wedge shape.

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