KR20040050992A - Dure motor drum-type Washer - Google Patents

Abstract

PURPOSE: A dual-motor drum-type washing machine is provided to cut down the cost and improve washing and dewatering process by separately mounting motors for washing and dewatering, using an induction motor of small capacity, and performing drum-turn motions. CONSTITUTION: A dual-motor drum washing-type machine is composed of a motor(50) for washing; a washing pulley(52) connected with the motor for washing by a belt(51) and mounted with a first shaft(70) having a sun gear(72) at the front end; a plurality of planetary gears(74) engaged with the sun gear; a first drum(101) connected with a second shaft(80) drawn out from the center of a rotary plate(76) for combining central axes of the planetary gears; a motor(60) for dewatering; a dewatering pulley(62) connected with the motor for dewatering by the belt and arranged with a first connecting unit(91) through which the first shaft passes; a cylindrical internal gear case(90) for combining with the front end of the first connecting unit, embedding the planetary gears and the sun gear, and including gear teeth formed at the inside; a second connecting unit(92) through which the second shaft passes, drawn out of the central part of the internal gear case; and a second drum(102) combined with the front end of the second connecting unit.

Description

Dual motor drum washing machine {Dure motor drum-type Washer}

The present invention relates to a drum washing machine, and more particularly, to a washing machine in which a drum washing machine motor is separated into a washing motor and a dehydrating motor, and the drum is composed of two drums so that two drums can move through a motion during washing. .

In general, the drum washing method is a method in which the laundry is performed using the friction force of the rotating drum and the laundry by receiving the driving force of the motor while the detergent, the washing water, and the laundry are put in the drum. These don't get tangled with each other, and can be washed and pounded.

Referring to the structure of a conventional drum washing machine with reference to Figure 1 as follows.

1 is a vertical cross-sectional view showing a conventional drum washing machine, wherein a tub (2; tub) made of stainless steel is installed inside the cabinet (1), and a tub (drum 3) is installed inside the tub (2). This is rotatably installed.

In addition, a motor 5 is installed at one side of the tub 2, and a motor pulley 51 is axially connected to the motor 5.

Meanwhile, a drum shaft 31 is installed at the rear of the drum 3, and a drum pulley 32 is installed at the rear end of the drum shaft 31. The drum pulley 32 is a belt 6 which is a power transmission element. It is connected to the motor pulley 51 connected to the motor 5 by the rotation.

In addition, a suspension spring 24 supporting the tub 2 is installed between the inside of the upper surface of the cabinet 1 and the upper side of the outer peripheral surface of the tub 2, and the inside of the lower surface of the cabinet 1 and the tub. (2) A friction damper 25 is provided between the lower side of the outer circumferential surface to damp the vibration of the tub 2 generated during dehydration.

On the other hand, the tub 2 is composed of a tub cover 21 forming the front portion of the tub, a tub body 22 forming the side wall portion of the tub, and a back cover 23 forming the rear portion of the tub, In the central portion of the back cover 23, a bearing housing 4, in which bearings 4a and 4b, which are coupled while penetrating and joining the drum shaft 31 installed behind the drum 3, is fixedly assembled.

The bearing housing 4 is integrally formed with three coupling wings 41 extending radially and spaced apart from each other by 120 ° on the outer circumferential surface thereof, the end of the coupling blade 41 being the tub The rear end of the body 22 is fixed to the back cover 23 by being fastened by the fixing bracket 42 and the bolt 43.

On the other hand, since the tub 2 is equipped with a back cover 23 and a motor 5 made of stainless steel at the rear thereof, an unbalance of weight occurs in the tub 2 itself, and the front of the tub 2 The balance is provided with a balance weight 26 to prevent the imbalance of the weight as described above.

Such a drum washing machine is driven by a motor. The motor uses a BLDC motor or a universal motor. The motors are advantageous in that they can control the rotational speed of the motor and the direction of rotation, but the manufacturing cost is high and the manufacturing cost of the washing machine is increased. There was an increasing problem.

In addition, in the case of a fully automatic washing machine adopting a pulsator, a method of rotating the washing tank as well as a pulsator may be employed, that is, a loop type. However, a drum washing machine using a single drum adopts a loop type only by rotating the drum with a motor. There was also a problem that was difficult to do.

The present invention has been made in order to solve the problems of the prior art described above, while the existing washing and dewatering the motor at the same time separately installed as a washing motor and a dewatering motor using a small capacity induction motor, two motors It is an object of the present invention to provide a drum washing machine that can improve the washing and dewatering performance while reducing the manufacturing cost by allowing two drums to have a loop motion by appropriately adjusting them.

1 is a cross-sectional view showing a schematic cross section of a conventional drum washing machine.

Figure 2 is a cross-sectional view showing a preferred embodiment of a dual motor drum washing machine according to the present invention

Figure 3 is a schematic plan view of the dual motor drum washing machine according to the present invention from the rear

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

50: washing motor 52: washing pulley

60: dehydration motor 62: dehydration pulley

70: 1st axis 72: sun gear

74: planetary gear 76: rotating plate

80: second shaft 90: internal gear case

101: first drum 102: second drum

The present invention and the laundry motor to achieve the above object; A washing pulley having a first shaft connected to the washing motor by a belt and having a sun gear formed at a distal end thereof; A plurality of planetary gears meshing with the sun gear; A first drum connected to a second shaft drawn out from the center of the rotating plate combining the central shafts of the planetary gears; A dehydration motor; A dehydration pulley connected by the dewatering motor and a belt and having a first connection part formed to penetrate the first shaft; A cylindrical inner gear case coupled to a distal end of the first connection part and configured to contain a planetary gear and a sun gear and having gears formed on an inner side thereof; A second connecting portion drawn out from the center portion of the inner gear case and configured to penetrate the second shaft; It provides a dual-motor drum washing machine comprising a second drum coupled to the front end of the second connecting portion.

In particular, it is preferable to adjust the diameter of the motor pulley and the washing pulley so that the rotational speed of the washing motor and the washing pulley of the dual motor drum washing machine is 6: 1.

In addition, it is preferable to adjust the diameter of the motor pulley and the washing pulley so that the rotational speed of the dehydration motor and the dehydration pulley of the dual motor drum washing machine and the rotational speed of the dehydration pulley are 1.4: 1.

Preferably, the washing motor and the dehydration motor employ an induction motor.

Hereinafter, the configuration of the dual motor drum washing machine according to the present invention will be described in more detail with reference to the accompanying drawings. Prior to the description, detailed description of parts mentioned in detail in the prior art will be omitted in order to avoid duplication.

Figure 2 is a cross-sectional view showing a preferred embodiment of a dual motor drum washing machine according to the present invention.

Looking at the schematic configuration of the embodiment, there is provided a washing motor 50 to operate at the time of washing, the center of the washing pulley 52 is connected and driven by the washing motor 50 and the V-belt 51 The first shaft 70 is drawn out, but a gear is formed at the tip end of the first shaft 70.

The gear 72 of the first shaft 70 is connected to the center of the planetary gears 74 configured to engage a plurality of gears at the same time, hereinafter referred to as sun gear 72. As the sun gear 72 rotates, a plurality of planetary gears 74 are rotated at the same time. Such a sun gear 72 and the planetary gear 74 have an inner gear case 90 having gears formed on an inner circumferential surface thereof. It is configured to be built in.

The central portion of the planetary gears 74 are coupled in a row by the rotating plate 76, and the second shaft 80 is drawn out from the center of the rotating plate 76 to be coupled to the first drum 101. That is, the first drum 101 is rotated according to the movement of the rotating plate 76 which combines the central portions of the planetary gears 74.

The front side of the washing pulley 52 is provided with a dewatering pulley 62 connected by a dewatering motor 60 and a V belt 61. The dehydrating pulley 62 has a hole formed at the center thereof, and a cylindrical first connection portion 91 is installed through the hole. The first shaft 70 of the washing pulley 52 passes through the hole and the first connecting portion 91, and a bearing is provided between the first shaft 70 and the first connecting portion 91 to assist rotation. .

The first connector 91 is coupled to the inner gear case 90 provided with the planetary gear 74. The inner gear case 90 is formed in a substantially cylindrical shape and a gear tooth is formed on an inner circumferential surface thereof so that the planetary gear 74 is engaged with each other and is rotatable. In addition, the sun gear 72 and the planetary gear 74 serves as an assembly body to prevent the departure of the planetary gear 74 and the inner gear case 90 is configured to transmit the rotational force while rotating itself.

The second connecting portion 92 is provided on the opposite side of the first connecting portion 91 of the inner gear case 90, and the second connecting portion 92 is also formed in a cylindrical shape so that the second shaft 80 penetrates therein. In order to assist the rotation of the second shaft 80, a bearing is installed.

The second connector 92 is coupled to the second drum 102 incorporating the first drum 101 to transmit the rotational force to the second drum 102.

The first shaft 70, the second shaft 80, and the first connector 91 and the second connector 92 are all rotatable, and the first connector 91 and the second connector 92 are rotatable. Again, the bearing is coupled by the fixing part connected to the tub 2 of the drum washing machine to facilitate rotation.

Figure 3 is a schematic plan view of the dual motor drum washing machine according to the present invention from the rear.

As shown in the drawing, a washing pulley 52 and a dehydrating pulley 62 are formed outside the center of the tub 2 of the drum washing machine, and the washing pulley 52 is driven by the V-belt 51 for the washing motor 50. ) And the dehydration pulley 62 is also connected to the dehydration motor 60 by the V-belt 61.

The washing motor 50 and the dehydration motor 60 use an induction motor. The motor used in the conventional drum washing machine was a BLDC or a universal motor as mentioned in the prior art, but the motor has a problem in that the manufacturing cost is high and the power consumption is high. However, the induction motor has a constant rotational speed, and only reverse rotation is possible, so it can be installed at low cost with low power consumption.

The rotational speed of the washing motor 50 and the washing pulley 52 of the present invention is preferably set to 6: 1. This reduction ratio is adjusted by the diameter difference or gear ratio between the motor pulley 51 and the washing pulley 52. In addition, the rotational speed of the dehydration motor 60 and the rotational speed of the washing pulley 52 is preferably 1.4: 1.

Since the washing motor 50 has a characteristic of periodically rotating the first drum 101 in a clockwise or counterclockwise direction, a motor capable of forward and reverse rotation should be employed, and in the case of the dehydration motor 60, in one direction. Since the operation of dewatering the laundry by rotating at a high speed, it is possible to use a motor that rotates only in a clockwise direction, so that a motor that is cheaper and consumes less power than the washing motor 50 can be used.

Looking at the operation of the dual-motor drum washing machine according to the present invention.

Referring to FIG. 2 again, the washing motor 50 periodically rotates in the forward direction or the reverse direction during the washing operation. When the cycle is short, the operation is performed as follows.

The sun gear 72 formed at the tip of the first shaft 70 while the washing pulley 52 rotates by the rotation of the washing motor 50 and the first shaft 70 of the washing pulley 52 rotates. Will rotate. As the planetary gear 74 rotates by the rotation of the sun gear 72, the speed at which the entire planetary gear 74 rotates is considerably reduced. Preferably, the rotation speed of the sun gear 72 and the rotation speed of the rotating plate 76 in which the planetary gears 74 are coupled to each other are 5.5: 1.

As such, the rotational motion of the sun gear 72 is transmitted to the rotating plate 76 in which the planetary gear 74 is coupled, and the reduced rotational force rotates the first drum 101 through the second shaft 80.

When the period of forward and reverse rotation is short, when the sun gear 72 rotates in the forward direction, the inner gear case 90 connected to the dehydrating pulley 62 rotates in the reverse direction by the reaction force of the gear mechanism. Since the rotational force of the inner gear case 90 is transmitted to the second drum 102 through the second connecting portion 92, the first drum 101 and the second drum 102 rotate in opposite directions. .

Such movement is the same as the conventional pulsator type loop washing method, in which two drums are periodically rotated in opposite directions with each other so that washing water and detergent can be evenly penetrated to the laundry.

If the forward and reverse rotation cycle of the washing motor 50 is long as follows.

In the initial rotation of the washing pulley 52, as described above, the first drum 101 and the second drum 102 rotate in opposite directions, but after a predetermined time, an inertial force is applied to the first drum ( 101 is also rotated along the rotation direction of the second drum (102). After all, the conventional drum washing method is implemented as it is.

Hereinafter, the operation of the motor during the dehydration stroke will be described.

At the end of washing after dehydration, the washing motor 50 and the dewatering motor 60 are simultaneously started in the forward direction. When the two motors are rotated as described above, the initial starting force is improved, and the simultaneous rotation speed of the first drum 101 and the second drum 102 is increased.

Then, when the washing motor 50 is turned off to rotate the second drum 102 only with the dehydration motor 60, the first drum 101 also rotates by the inertia force. In this case, when controlling the rotation speed of the first drum 101 and the second drum 102, the dehydration motor 60 is controlled on / off at an appropriate speed.

The present invention is provided with a separate motor used for washing or dehydrating stroke of the drum washing machine can be reduced in cost by using an induction motor.

In addition, by installing a drum driven by each motor separately to enable the laundry washing through the washing administration to improve the washing efficiency and at the same time can reduce the power consumption.

Claims (4)

A washing motor; A washing pulley having a first shaft connected to the washing motor by a belt and having a sun gear formed at a distal end thereof; A plurality of planetary gears meshing with the sun gear; A first drum connected to a second shaft drawn out from the center of the rotating plate combining the central shafts of the planetary gears; A dehydration motor; A dehydration pulley connected by the dewatering motor and a belt and having a first connection part formed to penetrate the first shaft; A cylindrical inner gear case coupled to a distal end of the first connection part and configured to contain a planetary gear and a sun gear and having gears formed on an inner side thereof; A second connecting portion drawn out from the center portion of the inner gear case and configured to penetrate the second shaft; Dual motor drum washing machine comprising a second drum coupled to the front end of the second connecting portion. The method of claim 1, The first drum is a dual motor drum washing machine, characterized in that provided on the inside of the second drum The method according to claim 1 or 2, The washing motor is a dual motor drum washing machine, characterized in that the forward and reverse rotation induction motor. The method according to claim 1 or 2, The dewatering motor is a dual-motor drum washing machine, characterized in that the induction motor can only forward rotation.