KR20000009664A - Power feeding device of washing machine - Google Patents

Abstract

PURPOSE: A power feeding device of a washing machine is provided to be able to perform the same washing and dehydrating as the existing washing machine even if a clutch for switching the power during washing and dehydrating is removed. CONSTITUTION: The power transmission device of a washing machine is composed of: a motor having a stator(62a) for forming a magnetic field by feeding power; a rotor(62b) for revolving in the inner side of the stator, affected by the magnetic field formed from the fixing piece; a motor shaft(61) forcibly inserted to revolve on the inner circumferential face of the revolving piece; an upper and a lower cover flanges(62c)(62d) for covering the motor on the upper and the lower sides of the motor.

Description

Power train of washing machine

The present invention relates to a power transmission device for a washing machine, and more particularly, to perform the same washing and dehydration as the existing washing machine without removing the clutch (Cutch) to switch the power during washing and dehydration administration and at the same time new water flow during the washing administration. It relates to a power train of a washing machine which causes (high pressure water flow).

In general, a conventional washing machine, as shown in Figure 1, the rear side of the washing machine body 1 is equipped with a water supply means 8 for supplying the washing water into the washing tank 2 and the dehydration tank (6) On the lower side of one side, a drainage means 9 for draining the washing water in the dehydration tank 6 to the outside is mounted.

The lower end of the water supply means 8 is equipped with detergent dissolving means 10 for dissolving the detergent into the washing tank 2 and the dewatering tank 6 together with the wash water.

The bottom of the dehydration tank (6) is equipped with a stirrer (7) for performing the stirring and washing by applying power to the turbulence and at the same time turbulent flow of the wash water in the dehydration tank (6) while applying a physical force to the laundry. have.

In the center of the washing tank (2) is provided a motor shaft (11) to which the stirrer (7) is connected, and a dehydration shaft (to which the dehydration tank (6) which rotates at a high speed during dehydration stroke) is connected to the outside of the motor shaft ( 12) is inserted, and a power generating means (3) for generating power to rotate the motor shaft (11) and dewatering shaft (12) by an applied power source is provided on the outer bottom surface of the washing tank (2). .

That is, the power transmission means 3 has already been filed by the applicant in the patent application No. 98-26456 (application date: July 1, 1998). That is, the power transmission means 3 is a motor shaft 11 is rotated by receiving the power of the motor 31 at the rotation center of the washing tank 2 as shown in Figure 2 to 4, the motor (31) is composed of a stator (31a) is applied to the power to form a magnetic field, and the rotor (31b) to rotate inside the stator (31a) under the influence of the magnetic field formed in the stator (31a), the rotor The motor shaft 11 is press-fitted to rotate on the inner circumferential surface of 31b.

Upper and lower cover flanges 31c and 31d covering the motor 31 are fastened to the upper and lower sides of the motor 31 by the fastening member 32a, and the upper cover flange 31c is the washing tank 2. The lower surface of the fastening member 32b is fastened through the medium.

Sealing to the inside of the washing tank 2 so as not to leak the water in the washing tank 2 between the outer peripheral surface of the motor shaft 11 and at the same time the motor shaft 11 is rotated separately from the washing tank (2) A member 33 and a ball bearing 34 press-fit the inner circumferential surface of the motor shaft 11 from the lower side of the sealing member 33 and the outer ring press-fit the inner circumferential surface of the upper cover flange 31c. .

The motor shaft 11 is provided with a dehydration tank flange 6a which cooperates with the dehydration tank 6, and the dehydration tank flange 6a rotates from the motor shaft 11 above the dehydration tank flange 6a. The nut 35 is fastened to prevent it from being separated while the lower carrier 36 is fastened to the upper surface of the dehydrating tank flange 6a by the fastening member 32c.

A plurality of planetary gears 37 are supported on the lower carrier 36 via the shaft 38, and the sun gear 39 geared with the motor shaft 11 is formed inside the planetary gears 37. Is installed, the internal gear 40 is geared to the outside of the planetary gears 37, the upper carrier 41 is a plurality of shafts on the upper side of the shaft 38 connecting the lower carrier (36) (38) is supported.

A drum 42 is press-fitted to the outer circumferential surface of the internal gear 40, and a metal bearing 43 is inserted into the upper inner circumferential surface of the drum 42 so as to rotate separately from the upper carrier 41. On the outer circumferential surface of the drum 42, a stirrer 7 for stirring the washing water and the laundry in the dehydration tank 6 is attached to the nut 44 for fastening the upper portion of the drum 42.

Here, a lower clutch 45 is formed on the upper inner circumferential surface of the drum 42, and a buoyancy cylinder 46 is installed on the upper side of the lower clutch 45 to move up and down by buoyancy depending on the presence or absence of wash water. Is connected, the connecting rod 47 is connected to the lower side of the buoyancy cylinder 46 is connected.

An upper clutch 48 engaged with the lower clutch 45 is installed at a lower end of the connecting rod 47, and the upper height of the buoyancy cylinder 46 is uniformly limited at a central upper portion of the stirrer 7. A buoyancy cylinder cover 49 is provided.

The upper end of the motor shaft 11 is formed with a polygonal or spline-shaped square portion 50 is engaged with the upper clutch 48.

A sleeve 51 is inserted between the outer circumferential surface of the motor shaft 11 and the dehydration tank flange 6a so as to slide with each other.

Referring to the conventional operation configured as described above, first, by applying power to the motor 31 during the washing stroke to rotate the motor shaft 11, the sun gear 39 formed on the outer peripheral surface of the upper end on the motor shaft 11 Is rotated, and the internal gear 36 meshed with the outer circumference of the planetary gear 37 is rotated by a plurality of planetary gears 37 engaged with the sun gear 39 in the opposite direction to the sun gear 39. The planetary gear 37 rotates at a decelerated rotational speed in the same direction as the planetary gear 37, and the drum 42 interlocked on the outer circumferential surface of the internal gear 36 rotates, and the stirrer is attached to the outer circumference of the drum 42. 7) is interlocked with the motor shaft 11 in a different direction.

In addition, the upper and lower carriers 41 and 36 connecting the shafts 38 of the planetary gears 37 at the upper and lower portions are rotated at a rotational speed lower than that of the motor shaft 11 so that the lower carrier 36 is rotated. The dehydration tank 6 is rotated at the same time as the dehydration tank flange 6a fastened to the fastening member 32c.

That is, during the washing stroke, the dehydration tank 6 and the stirrer 7 rotate in opposite directions to wash.

On the other hand, when the wash water is drained in the dehydration tank 6 in accordance with the dehydration stroke, the buoyancy cylinder 50 is lowered and the upper clutch 48 formed at its lower end is engaged with the lower clutch 45 formed at the upper carrier 41. .

In this state, when the motor shaft 11 rotates at a high speed, the upper carrier 48 clutched with the upper clutch 48 rotates at a high speed, and the lower carrier is connected by the shaft 38 connected to the upper carrier 41. 36 rotates, and the dewatering tank flange 6a and the dewatering tank 6 rotate at high speed to dehydrate the laundry.

That is, in the dehydration stroke, the sun gear 39, the planetary gear 37, and the internal gear 40 are integrally rotated together with each other, and the drum 42 and the stirrer 7 are also rotated in the same direction at the same time. do.

However, in the conventional power transmission device of the washing machine configured as described above, the upper clutch 48 and the lower clutch 45 are uneven in accordance with the lifting or lowering operation of the buoyancy cylinder 46 in order to switch the power to the washing stroke or the dehydrating stroke. It is a structure that is separated or combined in shape, but the power switching method of this structure due to the foreign matter such as scale and swelling generated in the operating part of the buoyancy cylinder 46 because the buoyancy cylinder 46 is used in water for a long time. There is a problem that the buoyancy cylinder 46 is not raised and lowered properly, and thus the washing operation or the dehydration operation is not smooth and malfunction occurs.

In addition, in the conventional power transmission device of the washing machine, a braking method using the counter electromotive force of the motor 31 is used for rapid braking when the stirrer 7 and the dehydration tank 6 are rotated at the same time in the same direction at the same time. Such a braking method has a problem in that rapid braking is impossible during a power failure because there is no mechanical brake.

In addition, in the conventional washing administration, the dehydration tank 6 is rotated by receiving the power of the motor shaft 11 through a reduction gear composed of the sun gear 39, the planetary gear 37, the internal gear 40, and the like. Rotation of the motor shaft 11 with a force considerably less than the rotational speed (rpm) of the motor shaft 11, which causes the flow of water generated by the unbalance of normal and reverse rotation to each other when the agitator 7 and the dehydration tank 6 are rotated in opposite directions. There is a problem in that the flow is weakly formed, thereby significantly lowering the washing power of the laundry.

Accordingly, the present invention has been made to solve the above problems, the object of the present invention is the motor shaft and the dehydration tank in the same direction in the washing stroke according to the force of inertia proportional to the initial rotation speed when the motor shaft is rotated Washing by rotating in the opposite direction to the stirrer while rotating to rotate or dehydration by rotating the dehydrating tank and stirrer in the same direction with the motor shaft in the dehydration stroke to switch the washing stroke and dehydration stroke as conventionally It is to provide a power transmission device of the washing machine to remove the clutch and the buoyancy cylinder that was used to prevent the malfunction during power switching.

Another object of the present invention is to install a mechanical brake instead of removing the clutch so that the dehydration tank can be suddenly braked immediately by the brake device operated by the spring force of the spring without power supply when power is cut off during high speed and intermittent dewatering administration. To provide a power train for a washing machine.

Still another object of the present invention is that the dehydration tank receives power directly from the motor shaft without passing through the speed reducing device during the washing stroke, and rotates in the same direction while balancing the force with the stirrer that rotates in the opposite direction to strengthen the flow of water. It is to provide a power transmission device of the washing machine to increase the washing power of the laundry.

The power transmission device of the washing machine according to the present invention made to achieve the above object is to reduce the rotation of the motor shaft by the deceleration means during the washing stroke to rotate the stirrer and the dehydration tank in the opposite direction, the motor shaft during the dehydration stroke In the power transmission device of the washing machine configured to rotate the stirrer and the dehydration tank at the same direction and at the same speed, the power transmission device of the washing machine is fitted at a predetermined height of the outer periphery of the motor shaft and press-fitted to the rotation center of the dehydration tank and integrally rotated. When the motor shaft is rotated during dehydration and washing, the dehydration shaft is rotated in the same direction by the force of inertia, which causes the dehydration tank to be interlocked and simultaneously rotated by different speed differences between the motor shaft and the dehydration shaft. When the agitator is decelerated to rotate in the opposite direction to the dehydration tank, and also in the absence of the clutch during dehydration administration When the motor shaft rotates slowly at low speed and accelerates, the dehydration shaft is rotated in the same direction by the inertia force, and the dehydrator is synchronized with each other while the decelerator is rotated by the same speed between the motor shaft and the dehydration shaft. And at least one oilless bearing interposed between the motor shaft and the dehydration shaft so as to rotate at the same direction and at the same speed as the dehydration tank.

In addition, the power transmission device of the washing machine of the present invention, to rotate the stirrer and the dehydration tank in the opposite direction in the washing tank during the washing stroke, and to rotate the stirrer and the dehydrating tank in the washing tank at the same direction and the same speed in the washing tank. A power transmission device of a washing machine comprising: a motor installed on the lower outside of the washing tank, a second motor shaft installed on the upper end of the first motor shaft so as to always rotate in the same direction as the first motor shaft of the motor; A deceleration means provided at an upper end of the second motor shaft to switch rotation in a direction opposite to the second motor shaft, a third motor shaft provided at an upper end of the deceleration means to rotate the stirrer while being rotated by the deceleration means; The rotor is freely fitted to the outer circumference of the third motor shaft so as to rotate at the same direction and at the same speed as the dewatering tank, and simultaneously press-fits to the center of rotation of the dewatering tank. A fixed dehydration shaft, a brake drum connecting the lower carrier of the deceleration means fitted to the outer circumference of the second motor shaft and the dehydration shaft to rotate in the same direction and at the same speed, and the first and second motor shafts during washing operation. When the rotation is rotated in the same direction by the force of inertia in the same direction and at the same time while rotating the stirrer decelerating rotation by different speed difference between the first and second motor shaft and the lower carrier in the opposite direction to the dehydration tank In addition, the first and second motor shafts are slowly rotated at a low speed in the absence of a clutch when dehydrating, and then accelerated while the first and second motor shafts and the lower carrier are driven in the same direction and at the same speed by the inertia force. At least one interposed between the first and second motor shaft and the lower carrier so that the third motor shaft is not decelerated when rotated and the stirrer is rotated in the same direction and at the same speed as the dehydration tank. It characterized in that it comprises a an oil-less bearing.

1 is a longitudinal sectional view showing a conventional washing machine;

2 is a longitudinal sectional view showing an operation state of a washing machine according to the related art;

Figure 3 is a longitudinal cross-sectional view showing an operation state during dehydration of the conventional washing machine;

4 is an exploded perspective view showing a power control means of the conventional washing machine;

5 is a longitudinal sectional view showing the clutchless power transmission device of the washing machine according to the first embodiment of the present invention;

6 is a longitudinal sectional view showing a clutchless power transmission device of a washing machine according to a second embodiment of the present invention;

7 is a longitudinal sectional view showing a clutchless power transmission device of a washing machine according to a third embodiment of the present invention;

8 is a perspective view showing the shape of the lower oilless bearing applied to the first to third embodiments of the present invention.

Explanation of symbols on the main parts of the drawings

2: washing tank 6: dewatering tank

7: stirrer 61 motor shaft

61a, 61b, and 61c: first to third motor shafts 62: motor

64b, 64c: Lower oilless bearing 640: Cylindrical surface

641: horizontal bending surface 65, 65a: de-shrink

70,70a: Lower carrier 80,80a: Break drum

Hereinafter, with reference to the accompanying Figure 5 with respect to the first embodiment of the present invention will be described in detail.

For reference, the same configuration and the same reference numerals are used for the same configuration as the conventional configuration, and detailed description thereof will be omitted.

In the power transmission means 100a of the present invention, the motor shaft 61 is rotated by the power of the motor 62 at the center of rotation of the washing tank 2, and the motor 62 receives power. A stator 62a forming a magnetic field, and a rotor 62b rotating inside the stator 62a under the influence of the magnetic field formed by the stator 62a, and the motor has an inner circumferential surface of the rotor 62b. The shaft 61 is pushed in and rotated.

Upper and lower cover flanges 62c and 62d covering the motor 62 are fastened to the upper and lower sides of the motor 62 by the fastening member 63a, and the upper cover flange 62c is the washing tank 2. The lower surface of the fastening member 63b is fastened through the medium.

The outer periphery of the motor shaft 61 is press-fitted to the rotation center of the dehydration tank 6 to interlock the dehydration tank 6 and at the same time to the motor shaft 61 via the upper and lower oilless bearings 64a and 64b. A dehydration shaft 65 is inserted and interlocked, and a nut 66 is fastened to the upper outer circumference of the dehydration shaft 65 to prevent the dehydration tank 6 from being detached while rotating from the dehydration shaft 65. The oil seal 69 is press-fitted to prevent leakage between the upper outer circumference of the motor shaft 61 and the upper inner circumference of the dehydration shaft 65.

At this time, the lower oilless bearing 64b has a cylindrical surface 640 interposed between the motor shaft 61 and the circumferential surface of the dewatering shaft 65, as shown in FIG. At the lower end of the surface 640 between the lower horizontal portion where the dehydration shaft 65 and the motor shaft 61 are in contact with each other so that the non-slip occurs due to frictional resistance caused by gravity acting on the dehydration shaft 65 during the dehydration stroke. A horizontal bent surface 641 is formed therebetween.

The dehydration shaft 65 is rotated separately from the washing tank 2 while sealing the water inside the washing tank 2 so as not to leak between the middle height outer circumference of the dewatering shaft 65 and the inner center of rotation of the washing tank 2. Between the sealing member 67 and the outer circumference of the dehydration shaft 65 and the inner circumference of the upper cover flange 62c with respect to the lower side of the sealing member 67 and the lower circumference and lower end of the motor shaft 61. Ball bearings 68 are respectively provided between the inner circumference of the cover flange 62d.

On the other hand, the lower carrier 70 is fastened to the bottom surface of the dehydration tank 6 by a fastening member 63c, and a plurality of planetary gears 71 are arranged on the upper portion of the lower carrier 70 to form the shaft 72. Rotation freely supported by the medium, and the motor shaft 61 and the fixed sun gear 73 is installed inside the planetary gears (71).

Internal gears 74 are geared to the outside of the planetary gears 71, and the upper carrier 75 is connected to the lower carrier 70 via a plurality of shafts 72 at the upper end of the shaft 72. The drum 76 is press-fitted between the outer circumference of the internal gear 74 and the center of rotation of the stirrer 7, and the upper inner circumference of the drum 76 and the upper carrier 75. The metal bearing 77 is inserted between the upper outer circumference of the upper side) so as to rotate separately, and the fastening member 63d for fixing the upper center of rotation of the drum 76 and the center of rotation of the stirrer 7 to each other. It is bound.

On the other hand, the brake drum 80 is installed on the outer periphery of the lower end of the dehydration shaft 65, the brake band for wrapping the brake drum 80 by the force of the spring 81 on the outer periphery of the brake drum ( 82 is provided, and brake levers 83 are provided at both ends of the brake band 82 so as to detach the brake band 82 from the brake drum 80 when the brake band is pulled by a driving force of a brake motor (not shown). It is.

Next, the operation and effect by the first embodiment of the present invention configured as described above will be described.

First, when a brake motor (not shown) is applied to the washing stroke or dewatering stroke and the power is applied to the brake lever 83, the brake lever 83 forcibly releases the elastic force of the brake spring 81 and brakes at the same time. Pulling the band 82, the brake band 82 is made to be freely rotatable to the dehydration shaft 65 and the dehydration tank (6) connected to the brake drum 80 while being separated from the surrounding brake drum (80) give.

When the washing operation starts in such a state, the washing water flows into the washing tank 2 and acts as a load on the dehydrating tank 6 and the stirrer 7.

At this time, when the motor 62 is operated by receiving power, the motor shaft 61 connected thereto rotates according to the driving of the motor 62, and the motor shaft 61 is a sun gear 73 fixed to the upper end thereof. ) And the geared planetary gear 71 is rotated in the opposite direction to the motor shaft 61 while rotating in the same direction as the motor shaft 61.

That is, the lower carrier 70, the dehydration tank 6, and the dehydration shaft 65 connected to the shaft 72 supporting the rotation of the planetary gear 71 rotate in the same direction as the motor shaft 61, and the planetary gear is rotated. 71 rotates the internal gear 74 in the opposite direction to the motor shaft 61 by a force that rotates in the opposite direction to the motor shaft 61 in accordance with the internal gear 74 and the gear bites.

Therefore, when the motor shaft 61 is rotated, the dehydration shaft 65 is rotated in the same direction by using the property of turning along with the inertia force, but at a speed lower than the rotation speed of the motor shaft 61, the dehydration shaft 65 Rotation of the stirrer 7 causes the power to the sun gear 73, the planetary gear 71, the internal gear 74, and the drum 76 connected to the upper end of the motor shaft 61 to be reduced. 61, the motor shaft 61, the dehydration shaft 65 and the dewatering tank 6 are rotated in the same direction.

At this time, since the dehydration shaft 65 is rotated by receiving power directly from the motor shaft 61, the stirrer 7 and the dehydration tank 6 are rotated in opposite directions to balance power when alternating forward and reverse rotations with each other. It can achieve this, thereby forming a strong flow of fresh water to increase the washing power.

On the other hand, during the dehydration stroke, there is no clutch connecting the dehydration tank 6 and the stirrer 7, so that the dehydration tank 6 and the stirrer 7 must be rotated in the same direction.

That is, after the wash water in the dehydration tank 6 is drained to the outside before the dehydration stroke starts, the load acting on the dehydration tank 6 and the stirrer 7 remains wet and the load (gravity) is dehydrated. It is transmitted to the dehydration shaft 65 which supports the tank 6.

At this time, the dehydration shaft 65 is more than the lower horizontal bending surface 641 of the lower oilless bearing 64b interposed between the inner circumferential surface of the dehydration shaft 65 and the outer circumferential surface of the motor shaft 61. By receiving a lot of gravity, the horizontal bending surface 641 interposed between the lower end of the dehydration shaft 65 and the step surface of the motor shaft 61 is subjected to strong frictional resistance and the slip action is slowed.

In this state, when the motor shaft 61 is initially rotated slowly at a low speed, the slip action of the upper and lower oilless bearings 64a and 64b interposed between the motor shaft 61 and the dehydration shaft 65 is reduced. Prior to being generated, the dehydration shaft 65 is rotated in the same direction as the rotational direction of the motor shaft 61 by the frictional resistance caused by the gravity of the wet clothes placed on the dehydration tank 6 and the stirrer 7.

Here, the dehydration shaft 65 is rotated in response to the late rotation reaction of the motor shaft 61, but there is only a slight speed difference, and after a certain time, the same speed by the force of inertia (Force of Inertia) Rotation of the gears, such as the sun gear 73, the planetary gear 71, the internal gear 74, the drum 76, etc. connected to the upper end of the motor shaft 61 does not cause any deceleration action in the same direction Is rotated.

Therefore, when the speed of the motor shaft 61 is gradually increased when the dehydration shaft 65, the motor shaft 61, the stirrer 7, and the dehydration tank 6 rotate in the same direction and at the same speed, the dehydration shaft 65 The dehydration tank 6 and the stirrer 7 are simultaneously rotated at a high speed while being rotated in the same speed and in the same direction to perform dehydration.

On the other hand, when the force pulling the brake lever 83 is removed in the dehydrated state, the brake band 82 is crimped on the outer circumferential surface of the brake drum 80 while being retracted inward by the elastic force of the brake spring 81. Then, the rotation of the brake drum 80 is braked, and the brake drum 80 stops the rotation of the dehydration tank 6 by braking the dehydration shaft 65.

Next, a second embodiment of the present invention will be described in detail with reference to the accompanying FIG.

For reference, the same configuration and the same reference numerals are given to the conventional configuration and the same configuration as the first embodiment of the present invention, and detailed description thereof will be omitted.

In the power transmission means (100b) of the present invention, the rotation center of the rotor (62b) of the motor 62 is press-fitted so that the first motor shaft (61a) is rotated, the first motor shaft (61a) of the In the upper rotation center, the second motor shaft 61b is press-installed to a predetermined depth so as to be rotated by receiving the power of the first motor shaft 61a, and the washing tank 2, the dehydration tank 6, and the stirrer 7 are rotated. The third motor shaft 61c is installed at the center of rotation of the second motor shaft 61b so as to be rotated by receiving the decelerated power from the second motor shaft 61b.

That is, the lower carrier 70a is provided on the outer circumference of the second motor shaft 61b via the lower oilless bearing 64c, and the plurality of planetary gears 71 are provided on the upper portion of the lower carrier 70a. The shaft 72 is freely supported by rotation, and the second motor shaft 61b and the fixed sun gear 73 are installed inside the planetary gears 71.

At this time, the lower oilless bearing 64c has a cylindrical surface 640 interposed between the second motor shaft 61b and the peripheral surface of the lower carrier 70a, as shown in FIG. At the lower end of the cylindrical surface 640, the lower carrier 70a and the first motor shaft 61ba are pressurized by gravity acting on the lower carrier 70a at the time of dehydration stroke to cause frictional resistance, thereby causing non-slip. A horizontal bending surface 641 is formed between the lower horizontal portions in contact with each other.

Internal gears 74 are geared to the outside of the planetary gears 71, and the upper carrier 75a is connected to the lower carrier 70a via a plurality of shafts 72 at the upper end of the shaft 72. The drum 76a is press-fitted to the outer circumference of the internal gear 74 and the lower circumference of the third motor shaft 61c.

On the other hand, the upper housing 90 is fixed to the center of the bottom outer surface of the washing tank (2) via a plurality of fastening members (63e), one side and the lower end of the lower carrier (70a) to the upper housing (90). A lower housing 91 is installed between the outer circumferential surface to surround the drum 76a, and a lower carrier 70a between the lower inner circumference of the lower housing 91 and the lower outer circumference of the lower carrier 70a. The ball bearing 68 is interposed so as to freely support the rotor.

The outer periphery of the third motor shaft 61c is press-fitted to the rotation center of the dehydration tank 6 to interlock the dehydration tank 6 and at the same time through the upper and lower oilless bearings 64a and 64b. A dehydration shaft 65a fitted to and interlocked with the three motor shafts 61c is provided, and a dehydration tank 6 press-fitted and fixed to the outer periphery of the upper end of the dehydration shaft 65a is lowered on the outer periphery height of the dehydration shaft 65a. The stop ring 92 is fixed to be positioned at a predetermined height, and the oil seal 69 is prevented from leaking between the upper outer circumference of the third motor shaft 61c and the upper inner circumference of the dehydration shaft 65a. It is press-fitted.

The dehydration shaft 65a is sealed between the outer circumference of the dehydration shaft 65a and the inner circumference of the rotation center of the washing tub 2 with respect to the lower side of the stop ring 92 while preventing the water in the washing tank 2 from leaking. A sealing member 67 is installed to support the washing tank 2 so as to be rotated separately, and a brake drum 80a is installed between the lower circumference of the dehydration shaft 65a and the outer circumference of the lower carrier 70a. The ball bearing 68 is interposed between the upper outer circumference of the brake drum 80a and the upper inner circumference of the upper housing 90 so as to freely support the brake drum 80a.

At this time, a brake band 82 is provided on the outer circumference of the brake drum 80a to surround the brake drum 80a by the force of the spring 81, and both ends of the brake band 82 are not shown. The brake lever 83 is provided to disengage the brake band 82 from the brake drum 80a when being pulled by the driving force of the brake motor.

Next, the operation and effect by the second embodiment of the present invention configured as described above will be described.

For reference, as in the first embodiment of the present invention, the brake device makes the dehydration shaft 65a and the dehydration tank 6 rotatable freely at the time of washing administration or at the start of the dehydration stroke, and when the dehydration stroke is completed, the dehydration shaft ( Since the rotation of the dehydration tank 6 is stopped by braking 65a), the first to third motor shafts 61a and 61b having different configurations from the first embodiment of the present invention will be described below for convenience of description. Only the interlocking relationship of 61c and the rotation direction of the dehydration tank 6 and the stirrer 7 are demonstrated.

During the washing stroke, when the first motor shaft 61a connected thereto is rotated according to the driving of the motor 62, the first motor shaft 61a moves in the same direction and in the same direction as the second motor shaft 61b fixed at the upper end thereof. It rotates at a speed, and the second motor shaft 61b rotates the sun gear 73 and the geared planetary gear 71 fixed to the outer circumference of the upper end thereof so that the planetary gear 71 is rotated by the second motor shaft ( It rotates in the opposite direction to 61b) and simultaneously rotates in the same direction as the second motor shaft 61b.

That is, the lower carrier 70a connected to the shaft 72 supporting the rotation of the planetary gear 71 rotates the brake drum 80a → dehydration shaft 65a → dehydration tank 6 simultaneously in the same direction and at the same speed. The internal gear 74 connected to the planetary gear 71 simultaneously rotates the drum 76a-> 3rd motor shaft 61c-> the stirrer 7 at the same time as it rotates in the same direction as the 2nd motor shaft 61b. By rotating in the same direction and at the same speed and in the opposite direction to the second motor shaft 61b, the stirrer 7 and the dehydrating tank 6 are rotated in opposite directions, similar to the effect of the first embodiment of the present invention. It will increase the washing power by forming a strong flow of fresh water.

On the other hand, in the dehydration operation, since there is no clutch connecting the dehydration tank 6 and the stirrer 7 as in the first embodiment of the present invention, the dehydration tank 6 and the stirrer 7 must be rotated in the same direction. .

That is, after the wash water in the dehydration tank 6 is drained to the outside before the dehydration stroke starts, the load acting on the dehydration tank 6 and the stirrer 7 remains wet and the load (gravity) is dehydrated. It is transmitted to the dehydration shaft 65a which supports the tank 6.

At this time, the gravity applied to the dehydration shaft (65a) is transferred to the dehydration shaft (65a) → brake drum (80a) → lower carrier (70a) → oilless bearing (64c) by the lower horizontal bending surface of the lower oilless bearing (64c) A strong frictional resistance is given to the 641 to slow down the slip action.

In this state, when the first and second motor shafts 61b are slowly rotated slowly at a low speed, the lower oilless bearing 64c of the lower oilless bearing 64c interposed between the first motor shaft 61a and the lower carrier 70a may be rotated. Before the horizontal bending surface 641 slips, a non-slip is generated by frictional resistance caused by gravity of wet clothes placed on the dehydration tank 6 and the stirrer 7, and thus the lower carrier 70a and the first carrier. And the second motor shaft 61b are rotated in the same direction.

Here, the lower carrier 70a is rotated by receiving a late rotation reaction of the first and second motor shafts 61b, but there is only a slight speed difference, and a force of inertia after a certain time elapses. By rotating at the same speed with each other by the sun gear 73, the planetary gear 71, the internal gear 74, the drum 76a installed between the second motor shaft (61b) and the third motor shaft (61c) The deceleration device such as) rotates the stirrer 7 in the same direction via the third motor shaft 61c while also rotating in the same direction without causing any deceleration.

Accordingly, the first to third motor shafts 61a, 61b, 61c and the dehydration shaft 65a simultaneously rotate the dehydration tank 6 and the stirrer 7 while being rotated in the same direction and at the same speed after a predetermined time. Spin at high speed to perform dehydration

Next, a third embodiment of the present invention will be described in detail with reference to the accompanying FIG.

For reference, the same configuration and the same reference numerals are given to the conventional configuration and the same configuration as the first and second embodiments of the present invention, and detailed description thereof will be omitted.

In the power transmission means 100c according to the third embodiment of the present invention, the drum 76a used in the power transmission means 100b according to the second embodiment of the present invention is deleted, and the internal gear 74 is replaced. The upper surface of the upper carrier 75a, which is fixed to the inner circumferential wall of the brake drum 80a and connected to the shaft 72 that supports the rotation of the planetary gear 71, is fixed to the outer peripheral surface of the lower end of the third motor shaft 61c. .

Next, the operation and effect by the third embodiment of the present invention configured as described above will be described.

For reference, as in the first and second embodiments of the present invention, the brake device makes the dehydration shaft 65a and the dehydration tank 6 freely rotatable at the time of washing administration or at the start of the dehydration stroke, and when the dehydration stroke is over. Since the rotation of the dehydration tank 6 is stopped by braking the dehydration shaft 65a, the first to third motor shafts 61a having different configurations from those of the first embodiment of the present invention will be described below for convenience of description. Only the interlocking relationship of 61b and 61c and the rotational direction of the dehydration tank 6 and the stirrer 7 are demonstrated.

At the washing stroke, when the motor 62 is driven, the first and second motor shafts 61a and 61b are rotated at the same time, and the second motor shaft 61b is the sun gear 73 → the planetary gear 71 →. The shaft 72 → the upper carrier 75a → the third motor shaft 61c → the stirrer 7 are rotated in the same direction.

However, the internal gear 74 geared to the planetary gear 71 rotates the brake drum 80a → dehydration shaft 65a → dehydration tank 6 at the same direction and at the same time, and at the same time, the second motor shaft. It rotates in the opposite direction to 61b.

Therefore, the stirrer 7 and the dehydration tank 6 are rotated in the opposite directions from the first and second embodiments of the present invention, but are rotated in substantially opposite directions, so as to have a strong fresh water like the effect of the first embodiment of the present invention. Form the flow of the flow will increase the washing power.

Since the dehydration stroke is the same as the second embodiment of the present invention, description of the action and effect is omitted.

As described above, according to the power transmission apparatus of the washing machines according to the first to third embodiments of the present invention, the motor shaft and the dehydration tank are the same during washing operation according to the inertia force proportional to the initial rotation speed when the motor shaft is rotated. To rotate in the opposite direction to the stirrer while washing, or to rotate the dehydrating tank and the stirrer in the same direction together with the motor shaft during the dehydration operation. By eliminating the clutch and the buoyancy cylinder that was used in order to have the effect that can prevent the malfunction during power change.

In addition, since mechanical brakes are installed instead of removing the clutch, it is possible to suddenly brake the dewatering tank immediately by the brake device operated by the spring force without power supply when power is cut off during high speed and intermittent dehydration administration. have.

In addition, during the washing process, the dehydration tank receives power directly from the motor shaft without passing through the deceleration device, so that it can balance power with the stirrer that rotates in the opposite direction while rotating in the same direction. It is effective to increase the washing power.

Claims (5)

The power of the washing machine configured to reduce the rotation of the motor shaft by the deceleration means in the washing stroke to rotate the stirrer and the dehydration tank in opposite directions, and to rotate the stirrer and the dehydration tank in the same direction and at the same speed by the motor shaft during the dehydration stroke. In the delivery device, A dewatering shaft which is fitted at a predetermined height of the outer circumference of the motor shaft and is integrally rotated by being press-fitted to the center of rotation of the dehydrating tank; When the motor shaft is rotated in the washing stroke, the dehydration shaft is rotated in the same direction by the inertia force to simultaneously link the dehydration tank and the agitator when the motor shaft and the dehydration shaft are rotated by different speed differences. Deceleration is rotated in the opposite direction to the dehydration tank.In the dehydration stroke, the motor shaft rotates slowly at low speed in the absence of the clutch, and the dehydration shaft is rotated in the same direction by the inertia force. At least one oilless bearing interposed between the motor shaft and the dehydration shaft so as to rotate at the same direction and at the same speed as the dehydration tank without being decelerated when the motor shaft and the dehydration shaft are rotated at the same speed. Power transmission device for a washing machine comprising a. The method of claim 1, Is installed on the outer periphery of the lower end of the dehydration shaft is separated for smooth rotation of the de-shrinkage during washing and dehydration administration, and further comprising a brake means for braking the rotation of the de-shrinkage during dehydration stop and power failure. The method of claim 1, The oilless bearing, A cylindrical surface interposed between the circumferential surface of the motor shaft and the dewatering shaft; Power of the washing machine characterized by having a horizontal bending surface interposed between the lower horizontal portion in contact with the de-shrinkage and the motor shaft so that the non-slip occurs by being pressed by gravity acting on the deshrinkment during the dehydration stroke to cause frictional resistance Delivery device. In the power transmission device of the washing machine configured to rotate the stirrer and the dehydration tank in opposite directions in the washing tank during the washing stroke, and to rotate the stirrer and the dehydrating tank in the washing tank at the same direction and at the same speed in the washing tank. A motor installed outside the lower part of the washing tank, A second motor shaft installed at an upper end of the first motor shaft so as to always rotate in the same direction as the first motor shaft of the motor; Deceleration means installed at an upper end of the second motor shaft to switch rotation in a direction opposite to the second motor shaft when the washing stroke; A third motor shaft installed at an upper end of the deceleration means to rotate the stirrer while being decelerated and rotated by the deceleration means; A dehydration shaft freely fitted to the outer periphery of the third motor shaft so as to rotate at the same direction and at the same speed as the dehydration tank and press-fitted to the center of rotation of the dehydration tank; A brake drum connecting the lower carrier of the reduction means fitted to the outer circumference of the second motor shaft and the dehydration shaft to rotate in the same direction and at the same speed; When the first and second motor shafts are rotated during washing, the dehydration tank is rotated in the same direction by the inertia force, and at the same time, the first and second motor shafts are decelerated by different speed differences between the first and second motor shafts. The stirrer is rotated in the opposite direction to the dehydration tank, and the first and second motor shafts are slowly rotated at a low speed while being accelerated while the clutch is absent during the dehydration stroke, and the first and second motors are driven by the inertia force. At least interposed between the first and second motor shafts and the lower carrier such that the third motor shaft is not decelerated when the shaft and the lower carrier are rotated in the same direction and at the same speed and the stirrer is rotated at the same direction and the same speed as the dehydration tank. A power train of a washing machine comprising at least one oilless bearing. The method of claim 4, wherein The oilless bearing, A cylindrical surface interposed between the second motor shaft and a circumferential surface of the lower carrier, Washing machine comprising a horizontal bending surface interposed between the lower carrier and the lower horizontal portion in contact with the first motor shaft so that the non-slip occurs by being pressed by gravity acting on the lower carrier during frictional dehydration to cause friction resistance Power train.