KR19990084885A - washer - Google Patents

Abstract

The present invention provides a casing, an outer tub installed in the casing, a cylindrical spin basket rotatably installed in the outer tub by a spin basket shaft to accommodate laundry, a drive motor installed in the casing, and the spin. A washing machine having a pulsator housed rotatably in a basket to form a washing water flow, the washing machine comprising: a buoyancy generating unit attached to the pulsator to allow the pulsator to be buoyantly liftable according to the washing water level; A drive shaft electrically connected to the drive motor and extending to the inside of the spin basket along an axis of the pulsator; Connecting means for connecting the pulsator so as to be rotatable and simultaneously rotatable along the drive shaft; A fixed clutch member integrally rotatable to the spin basket shaft; It is coupled to the pulsator is characterized in that it comprises a movable clutch member which is integrally rotatable and liftable moveable and engaged with the fixed clutch member in a lowered state and integrally rotatable in the lowered state and disengaged when raised. As a result, a washing machine capable of switching the driving power reliably by simplifying the clutch structure by reducing the number of components related to power transmission is simplified.

Description

washer

The present invention relates to a washing machine, and more particularly, to a washing machine in which the number of components related to power transmission is not only simple in structure but also in a simple clutch structure to enable reliable driving force switching.

A general washing machine has a substantially rectangular casing and a top cover coupled to an upper end of the casing. An outer tub fixed by a suspension device is installed in the casing, and a spin basket for accommodating laundry is provided in the outer tub.

4 is a longitudinal cross-sectional view of the periphery of the shaft assembly in the washing and rinsing state of the conventional washing machine, and FIG. 5 is a longitudinal cross-sectional view of the periphery of the shaft assembly in the dehydrated state of the conventional washing machine. As shown in these figures, the outer basket 111 is accommodated in the spin basket 113 for accommodating the laundry, the lower portion of the spin basket 113 is a disk-shaped pulsator 115 for forming a water flow Is installed. The buoyancy chamber 163 is formed in the pulsator 115 so that the pulsator 115 can be elevated by the washing water level.

The drive motor 117 is fixedly installed in the lower region of the outer tub 111, and the shaft assembly 127 is installed between the drive motor 117 and the outer tub 111.

The shaft assembly 127 has a pulsator shaft 170 for rotating the pulsator 115, has the same axis as the pulsator shaft 170, and is formed to surround the pulsator shaft 170 to form a spin basket 113. And a spin basket shaft 131 for rotating the shaft, a reduction gear device 173 for transmitting a driving force to the pulsator shaft 170, and an outer casing 153 surrounding them.

A bearing 174 is provided between the pulsator shaft 170 and the spin basket shaft 131 to support the rotation of the pulsator shaft 170. The pulsator shaft 170 is press-fitted to the pulsator shaft 170. And an upper clutch 125 capable of lifting up and down along the axial direction, and a lower clutch 141 engaged with each other when the upper clutch 125 is pushed into the spin basket shaft 131 and is in a down state.

The reduction gear device 173 is coupled to the sun gear 175 coupled to the drive motor shaft 129 and the sun gear 175 so as to be integrally rotatable with the drive motor shaft 129, and the sun gear 175. A plurality of planetary gears 177 that rotate around and have a same axis as the drive motor shaft 129, and a ring gear 179 formed to surround the sun gear 175 and the planetary gear 177. . On the upper side of the planetary gear 177 is provided a carrier 179 coupled to the axis of the planetary gear 177 to transfer the pivoting movement of the planetary gear 177 to the pulsator shaft 170.

In the outer circumferential region of the reduction gear device 173, a brake device 181 for controlling the rotation of the spin basket 113 is provided. The brake device 181 is formed to surround the outer circumferential surface of the ring gear 179 so that the upper region surrounds the cylindrical brake drum 183 coupled with the spin basket shaft 131 and the outer circumferential surface of the brake drum 183. The brake band 185 is installed, and the brake lever 187 selectively contacts and detaches the brake band 185 from the outer circumferential surface of the brake drum 183 as the brake band 185 rotates in combination with the brake band 185.

In addition, a power transmission unit 191 is formed at the lower end of the pulsator shaft 170 to couple and separate the drive motor shaft 129 and the spline 189 as the pulsator shaft 170 moves up and down.

According to the above configuration, when washing and rinsing, if the washing water is supplied into the spin basket 113, the upper clutch 125 and the lower clutch 141 as the pulsator 115 rises due to the buoyancy of the washing water. ) Is also separated, and the power transmission unit 191 is also separated from the drive motor shaft (129). In addition, the brake band 185 contacts the outer circumferential surface of the brake drum 183 to restrain the rotation of the brake drum 183. When the drive motor shaft 129 rotates, the sun gear 175 rotates integrally with the drive motor shaft 129, and the planetary gear 177 meshed with the sun gear 175 is connected to the sun gear 175. While rotating in the opposite direction, it rotates around the sun gear 175 in the same direction as the sun gear 175 along the ring gear 179 inside the brake drum 183. The pivoting motion of the planetary gear 177 is transmitted to the pulsator shaft 170 by the carrier 179 coupled to the axis of the planetary gear 177 in the spin basket 113 as the pulsator 115 rotates. Washing water is formed to wash and rinse. At this time, since the rotation speed of the planetary gear 177 is decelerated by the gear ratio of the sun gear 175 and the ring gear 179 as the ring gear 179 does not rotate, when the washing and rinsing, the pulsator 115 ) Is a speed relatively slower than the rotation speed of the drive motor shaft (129).

When washing is completed and dewatering, the brake lever 187 is rotated so that the brake band 185 is separated from the outer circumferential surface of the brake drum 183 so that the brake drum 183 is free to rotate. At the same time, the washing water in the spin basket 113 is discharged to the outside of the casing, when a predetermined amount of the washing water in the spin basket 113 is discharged, the washing water level in the spin basket 113 is lowered and the pulsator 115 moves downward, The upper clutch 125 installed on the eater shaft 170 is also moved downward to engage the lower clutch 141, and the power transmission unit 191 is also coupled to the driving motor shaft 129. When the driving motor shaft 129 rotates, the pulsator shaft 170 rotates through the power transmission unit 191, and the rotational force of the sun gear 175 is transmitted to the ring gear 179 through the planetary gear 177. The ring gear 179 installed on the inner surface of the brake drum 183 rotates in the same rotational direction and rotational speed as the sun gear 175. Thus, as the sun gear 175 and the ring gear 179 performs the same movement, deceleration by the gear ratio does not occur. In addition, when the pulsator shaft 170 rotates, as the rotational force is transmitted to the lower clutch 141 engaged with the upper clutch 125 through the upper clutch 125, the spin basket shaft 131 rotates to spin the basket 113 ) Will rotate. As such, as the pulsator 115 and the spin basket 113 rotate in the same direction and speed, dehydration is performed.

By the way, in the conventional washing machine, when rotating the pulsator forming the washing water flow in the spin basket for washing, there is a problem that the structure is complicated by the large number of parts for transmitting the driving force, such as the reduction gear device and the clutch device.

Accordingly, an object of the present invention is to provide a washing machine capable of switching the driving force reliably by simplifying the clutch structure by reducing the number of components related to power transmission.

1 is a longitudinal sectional view of a washing machine according to the present invention;

Figure 2 is an enlarged longitudinal sectional view of the surrounding area of the shaft assembly in the washing and rinsing state of Figure 1,

Figure 3 is an enlarged longitudinal sectional view of the region around the shaft assembly in the dewatered state of Figure 1,

4 is a longitudinal cross-sectional view of a region around a shaft assembly in a washing and rinsing state of a conventional washing machine;

5 is a longitudinal cross-sectional view of a region around a shaft assembly in a dehydrated state of a conventional washing machine.

* Explanation of symbols for the main parts of the drawings

11: Outer 13: Spin basket

15: pulsator 17: drive motor

25: upper clutch 29: drive motor shaft

31: spin basket shaft 35: spline

41: lower clutch 63: buoyancy chamber

According to the present invention, the object is a casing, an outer tub provided in the casing, a cylindrical spin basket rotatably installed by the spin basket shaft in the outer tub to accommodate laundry, and a drive provided in the casing. A washing machine having a motor and a pulsator rotatably housed in the spin basket to form a washing water flow, the washing machine comprising: a buoyancy generating unit attached to the pulsator to allow the pulsator to be buoyantly liftable according to the level of the washing water; ; A drive shaft electrically connected to the drive motor and extending to the inside of the spin basket along an axis of the pulsator; Connecting means for connecting the pulsator so as to be rotatable and simultaneously rotatable along the drive shaft; A fixed clutch member integrally rotatable to the spin basket shaft; Is coupled to the pulsator is achieved by a washing machine characterized in that it comprises a movable clutch member which is integrally rotatable and movable up and down rotatably coupled to the fixed clutch member in the lowered state and is disengaged when raised.

Here, the buoyancy generating unit may be preferably a buoyancy chamber formed in the pulsator to receive air.

In addition, the upper end of the drive shaft may be preferably provided with a stop for limiting the rising range of the pulsator, the connecting means may be effectively a spline teeth provided to correspond to the movable clutch member and the drive shaft. .

And, the fixed clutch member and the movable clutch member is a plate-like disk portion parallel to each other; It may be desirable to have a claw portion that projects from the plate surface of the disk portion and engages with each other.

In addition, it is preferable that the spin basket shaft is formed of a tubular body accommodating the drive shaft to be relatively rotatable, and the fixed clutch member and the spin basket shaft may be effectively formed integrally.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a longitudinal cross-sectional view of a washing machine according to the present invention. As shown in this figure, the washing machine according to the present invention has a casing 1 having a substantially rectangular cylindrical shape and a top cover 3 provided at the upper end of the casing 1.

The top cover 3 is provided with a door 5 that can be opened and closed to take out laundry, and a water supply pipe 7 for supplying washing water is provided at the rear edge of the door 5.

An outer tub 11 fixed by a plurality of suspensions 9 is installed in the casing 1, and a spin basket 13 rotatably installed in the outer tub 11 to accommodate laundry. It is installed. In the spin basket 13, a disk-shaped pulsator 15 for forming a stream of laundry is provided. The lower surface of the outer tub 11 is provided with a drive motor 17 for transmitting a driving force.

2 is an enlarged longitudinal sectional view of the surrounding area of the shaft assembly in the washing and rinsing state of FIG. 1, and FIG. 3 is an enlarged longitudinal sectional view of the surrounding area of the shaft assembly in the dewatering state of FIG. As shown in these figures, a buoyancy chamber 63 is formed in the pulsator 15, and the upper clutch 25 is press-fitted into the pulsator 15 to slide up and down integrally with the pulsator 15. Is combined.

A shaft assembly 27 is provided between the outer tub 11 and the drive motor 17. The shaft assembly 27 extends upwardly to the pulsator 15 so that the shaft assembly 27 is concentric with the drive motor shaft 29 and the drive motor shaft 29 to transmit the driving force to the pulsator 15. It is formed to wrap and has a spin basket shaft 31 of the tubular body for transmitting a driving force to the spin basket 13, and an outer casing 53 to surround them.

A spline 35 is formed in the upper region of the drive motor shaft 29 to guide the up and down flow of the upper clutch 25, and a height limiting bolt 65 restricting the rising height of the pulsator 15 is formed at the upper end thereof. Formed. A plurality of oilless bearings 37 are provided between the drive motor shaft 29 and the spin basket shaft 31 so as to support the rotational movement of the drive motor shaft 29, and the washing in the spin basket 13 is carried out. Packing 39 is provided to prevent water from leaking into shaft assembly 27.

The upper clutch 25 has a lower clutch 41 engaged with the upper clutch 25 at the upper end of the spin basket shaft 31, and the upper clutch 25 and the lower clutch 41 have a plurality of plates so as to firmly engage with each other. A claw is formed. In order to support the rotational movement of the spin basket shaft 31, the outer casing 55 is provided with an upper bearing 59 and a lower bearing 61.

The lower region of the spin basket 13 is recessed so as to be close to the outer circumferential surface of the pulsator 15 so that foreign matter is inserted between the lower surface of the spin basket 13 and the bottom surface of the pulsator 15, thereby causing the clutch to malfunction. Suppresses what causes it.

According to the above configuration, when washing and rinsing, when the washing water is supplied into the spin basket 13, the pulsator 15 floats up to the height limiting bolt 65 due to the water level of the washing water. And the lower clutch 41 will fall. Washing is performed as the pulsator 15 rotates to form a wash stream by the rotation of the drive motor shaft 29 coupled to the pulsator 15.

When the washing is finished and dewatering, the drain motor (not shown) is operated to drain the wash water in the spin basket 13 and the outer tub (11). When the predetermined wash water is drained, the water level in the spin basket 13 is lowered and the upper clutch 25 and the lower clutch 41 are engaged as the pulsator 15 descends. When the drive motor 17 rotates, the pulsator 15 directly connected to the drive motor shaft 29 is rotated, and the upper clutch 25 engaged with the spline 35 of the drive motor shaft 29 is rotated. As a result, the spin basket shaft 31 on which the lower clutch 41 is formed also rotates. The spin basket 13, which is coupled to the spin basket shaft 31, rotates by the rotation of the spin basket shaft 31, and dehydration is performed.

As such, the buoyancy generating unit attached to the pulsator to allow the pulsator to buoyancy lift according to the level of the wash water, and the drive shaft connected to the drive motor so as to be electrically connected to the inside of the spin basket along the axis of the pulsator and , A connecting means for connecting the pulsator to be rotatable at the same time as the drive shaft and capable of lifting up and down, a fixed clutch member coupled to the spin basket shaft so as to be rotatable, and coupled to the pulsator to rotate and move up and down in an integrated state. By providing a movable clutch member that is integrally rotatable with the fixed clutch member and disengaged when lifted, the number of parts related to power transmission is reduced, and the clutch structure can be simplified, and the clutch structure can be switched reliably. .

As described above, according to the present invention, there is provided a washing machine capable of switching the driving force reliably by simplifying the clutch structure by reducing the number of parts related to power transmission.

Claims (7)

A casing, an outer tub installed in the casing, a cylindrical spin basket rotatably installed in the outer tub by a spin basket shaft to receive laundry, a drive motor installed in the casing, and a rotatable in the spin basket. A washing machine having a pulsator housed so as to form a washing stream, A buoyancy generating unit attached to the pulsator so that the pulsator can be buoyantly lifted according to the level of wash water; A drive shaft electrically connected to the drive motor and extending to the inside of the spin basket along an axis of the pulsator; Connecting means for connecting the pulsator so as to be rotatable and simultaneously rotatable along the drive shaft; A fixed clutch member integrally rotatable to the spin basket shaft; And a movable clutch member coupled to the pulsator to rotate and move up and down integrally with the fixed clutch member so as to rotate integrally with the pulsator and to be disengaged when raised. The method of claim 1, And the buoyancy generator is a buoyancy chamber formed in the pulsator to receive air. The method of claim 1, Washing machine, characterized in that the upper end of the drive shaft is provided with a stop for limiting the rising range of the pulsator. The method of claim 1, The connecting means includes a spline teeth provided to correspond to the movable clutch member and the drive shaft. The method of claim 1, The fixed clutch member and the movable clutch member are plate-like disk portions parallel to each other; And a claw portion which protrudes from the plate surface of the disk portion and engages with each other. The method according to claim 1 or 3, And the spin basket shaft is formed of a tubular body accommodating the drive shaft to be relatively rotatable. The method according to claim 1 or 5, The fixed clutch member and the spin basket shaft is integrally formed with a washing machine.