KR19990084878A - washer - Google Patents

Abstract

The present invention provides a casing, an outer tub installed in the casing, a spin basket rotatably installed in the outer tub by a spin basket shaft to accommodate laundry, and a pulsator installed in the spin basket to form a laundry stream. And a washing motor having a driving motor for rotating the pulsator through a drive shaft concentric with the spin basket shaft, the fixed clutch member integrally rotatably coupled to the spin basket shaft; A movable clutch member which is integrally rotated on the drive shaft and slidably moves along the axial direction and is integrally rotatable with the fixed clutch member in a lowered state; A buoyancy body connected to the movable clutch member and accommodated in the pulsator and capable of elevating according to the water level; It characterized in that it comprises a power generation braking device for braking the rotation of the drive motor. As a result, a washing machine capable of reducing the number of components related to power transmission and braking of the driving motor to simplify the structure as well as simplifying the clutch structure to switch the driving power reliably is provided.

Description

washer

The present invention relates to a washing machine, and more particularly, to simplify the structure by reducing the number of components related to power transmission and braking of the driving motor, as well as simplifying the clutch structure to enable reliable driving force switching. It's about a washing machine.

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 for accommodating the laundry, the lower portion of the spin basket 113 in the form of a disk to form a laundry flow in the spin basket 113 Pulsator 115 is provided. The pulsator guide 119 is projected upward in the central region of the pulsator 115, and the washing water in the spin basket 113 may flow into the pulsator guide 119 on the upper surface of the pulsator guide 119. A plurality of washing water inflow holes 121 are formed to penetrate the plate surface.

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 reduction gear unit 170 is installed in the shaft assembly 127.

The brake drum 143 and the gear casing 171 are surrounded by the outside of the reduction gear device 170. The upper outer side surface of the cylindrical brake drum 143 is inserted into the inner diameter of the upper bearing 159 is installed in the upper region of the shaft assembly 127, the inner side is a spin basket shaft for rotating the spin basket 113 ( 131 is coupled to the outer surface of the. The spin basket shaft 131 extends upwardly to penetrate through the bottom surface of the outer tub 111 and is coupled to the spin basket 113. The lower end of the brake drum 143 is coupled to the gear casing 171, the lower end of the gear casing 171 is inserted into the inner diameter of the lower bearing 161 installed in the upper end region of the drive motor 117.

The reduction gear device 170 includes a sun gear 173, a plurality of planetary gears 177 engaged with the sun gear 173 and turning around the sun gear 173, and a ring engaged with the other side of the planetary gear 177. Has a gear 175. The sun gear 173 is installed to rotate integrally with the drive shaft 129 in the upper region of the drive shaft 129 inserted into the reduction gear device 170 from the bottom surface of the gear casing 171. The ring gear 175 is installed on the inner wall of the brake drum 143 concentrically with the axis of the drive shaft 129, and a plurality of planetary gears 177 are installed between the sun gear 173 and the ring gear 175. do. The carrier 179 connected to the axis of the planetary gear 177 is provided above the planetary gear 177. The carrier 179 drives the pulsator 115 and is coupled to the pulsator shaft 181 provided through the spin basket shaft 131.

Inside the pulsator shaft 181 is provided a connecting rod 185 that flows up and down along the axial direction of the pulsator shaft 181. The upper end region of the connecting rod 185 extends a predetermined length from the pulsator shaft 181, and is coupled to the buoyancy cylinder 123 provided inside the pulsator guide 119. The lower region of the connecting rod 185 includes the buoyancy cylinder 123. The clutch part 191 which flows up and down by this is provided. A packing 187 is connected between the connecting rod 185 and the pulsator shaft 181 to the lower surface of the buoyancy cylinder 123 and the upper end region of the pulsator shaft 181 to prevent the wash water from flowing out. A spline 193 recessed to be engaged with the clutch unit 191 is formed at an inner surface of the lower region of the pulsator shaft 181 and an upper end of the driving shaft 129.

A brake band 145 is installed on the outer circumferential surface of the brake drum 143 to control the rotation of the brake drum 143, and one side of the brake band 145 is coupled to the brake lever 147. The brake lever 147 rotates around the brake shaft 149 installed on one side, and a drain motor (not shown) is provided on the other side of the brake lever 147 connected to the brake band 145 based on the brake shaft 149. It is connected. The brake shaft 149 is provided with a brake spring 151 that elastically supports the brake lever 147 for restoring the position of the brake lever 147.

In the above-described configuration, when washing and rinsing, when the washing water is supplied into the spin basket 113, the washing water is introduced into the pulsator guide 119 through the washing water inlet hole 121 of the pulsator guide 119. As the buoyancy tube 123 is introduced by the buoyancy of the wash water, the clutch unit 191 is separated from the drive shaft 129. When the drive shaft 129 rotates, the sun gear 173 also rotates integrally with the drive shaft 129, and the planetary gear 177 meshed with the sun gear 173 is opposite to the rotation direction of the sun gear 173. To rotate around the sun gear 173 around the axis of the sun gear 173 in the same direction as the rotation direction of the sun gear 173 along the ring gear 175 inside the brake drum 143 while rotating do. By the rotation of the planetary gear 177, the carrier 179 connected to the shaft of the planetary gear 177 is rotated, and the pulsator shaft 181 coupled with the carrier 179 is rotated so that the pulsator is rotated. 115 rotates in the spin basket 113 to form a wash stream. In this way, the speed of the planetary gear 177 is reduced by the gear ratio of the sun gear 173 and the ring gear 175, so that the rotation speed of the pulsator 115 is relatively slower than the rotation speed of the drive shaft 129 Speed.

When washing is completed and dewatering, when the drain motor pulls one side of the brake lever 147, the brake lever 147 rotates around the brake shaft 149 so that the brake band 145 brake drum 143. It is separated from the outer peripheral surface of At the same time, the wash water in the spin basket 113 is discharged to the outside of the casing, and when a predetermined amount of the wash water in the spin basket 113 is discharged, the buoyancy cylinder 123 inside the pulsator guide 119 is also in the spin basket 113. As the wash water level is lowered, the clutch unit 191 of the connecting rod 185 moves downward. When the drive shaft 129 is rotated, the clutch unit 191 is accommodated in the upper spline 193 of the upper end of the drive shaft 129 and engaged with the carrier 179 to rotate at the same rotation speed as the drive shaft 129 as well. The brake drum 143 is also free to rotate so that the rotational force of the sun gear 173 is transmitted to the ring gear 175 through the planetary gear 177 so that the ring gear 175 installed on the inner side of the brake drum 143 is provided. It rotates in the same rotational direction and rotational speed as the sun gear 173. Thus, as the sun gear 173 and the ring gear 175 rotates at the same speed, deceleration due to the gear ratio does not occur. When the ring gear 175 rotates, the brake drum 143 also rotates, and the spin basket shaft 131 coupled to the brake drum 143 also rotates to dehydrate laundry in the spin basket 113.

However, in such a conventional washing machine, the structure is not only complicated because of the large number of parts such as a reduction gear device for rotating the pulsator for forming the washing water flow in the spin basket for washing and a brake device for braking the driving motor. Since the clutch unit is installed in the reduction gear unit, grease used for wear and noise reduction of the reduction gear unit may be buried in the clutch unit, thereby preventing washing and dehydration switching operations.

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

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

18: power generation braking device 19: pulsator guide

23: buoyancy cylinder 25: upper clutch

29: drive shaft 31: spin basket shaft

35: spline 41: lower clutch

According to the present invention, the object of the present invention is to provide a casing, an outer tub installed in the casing, a spin basket rotatably installed in the outer tub by a spin basket shaft to accommodate laundry, and a washing water flow installed in the spin basket. A washing machine having a pulsator to form a drive and a drive motor to rotate the pulsator through a drive shaft concentric with the spin basket shaft, the washing machine comprising: a fixed clutch member integrally rotatably coupled to the spin basket shaft; A movable clutch member which is integrally rotated on the drive shaft and slidably moves along the axial direction and is integrally rotatable with the fixed clutch member in a lowered state; A buoyancy body connected to the movable clutch member and accommodated in the pulsator and capable of elevating according to the water level; It is achieved by a washing machine comprising a power generation braking device for braking the rotation of the spin basket shaft.

Here, the movable clutch member and the drive shaft may be preferably splined, the fixed clutch member and the movable clutch member is a plate-like disk portion parallel to each other; It may be effective to have a claw that protrudes from the plate surface of the disc and engages with each other.

In addition, it is preferable that the spin basket shaft is formed of a tubular body accommodating the driving shaft so as to be relatively rotatable.

In addition, it may be preferable that a buoyant body accommodating part accommodating the buoyancy body to be lifted and lowered is formed at the center of the pulsator, and the upper end portion of the buoyant body accommodating part may be preferably domed.

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 substantially rectangular cylindrical casing 1 and a top cover 3 provided on the upper end of the casing 1 like the conventional washing machine.

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 suspension devices 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. In the lower region of the outer tub 11, a driving motor 17 for transmitting a driving force is provided, and a power generation braking device 18 for braking the driving motor 17 is provided.

2 is an enlarged longitudinal sectional view of the outer periphery area of the washing and rinsing state of FIG. 1, and FIG. 3 is an enlarged longitudinal sectional view of the outer periphery area of the dehydrated state of FIG. As shown in these figures, a dome-shaped pulsator guide 19 is projected upward in the central region of the pulsator 15, and the wash water in the spin basket 13 is provided in the pulsator guide 19. A plurality of washing water inlet holes 21 are formed to penetrate the plate surface so as to be introduced into the pulsator guide 19. Inside the pulsator guide 19, a hemispherical buoyancy cylinder 23 is provided which can be lifted and lowered according to the level of wash water accommodated in the spin basket 13. Between the spin basket 13 and the outer tub 11, the upper clutch 25 which is vertically flowing with the buoyancy cylinder 23 is coupled.

A shaft assembly 27 is provided between the outer tub 11 and the drive motor 17. The shaft assembly 27 extends upward to the pulsator 15 and is formed to enclose the drive shaft 29 concentrically with the drive shaft 29 and to drive the drive shaft 29 to transmit the driving force to the pulsator 15, the spin basket It has a spin basket shaft 31 of the tubular body which transmits a driving force to 13, and the outer casing 55 which surrounds these.

Splines 35 are formed in the upper region of the drive shaft 29 to guide the vertical flow of the upper clutch 25 coupled to the buoyancy cylinder 23. A plurality of oilless bearings 37 are provided between the drive shaft 29 and the spin basket 31 to support the rotational movement of the drive shaft 29, and the wash water in the spin basket 13 is the shaft assembly 27. Packing (39) is installed to prevent outflow.

The lower clutch 41 which engages with the upper clutch 25 is formed at the upper end of the spin basket shaft 31. A plurality of claws are formed on the upper surface of the upper clutch 25 and the lower clutch 41 so as to firmly engage with each other. 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.

According to the above configuration, when washing and rinsing, when the washing water is supplied into the spin basket 13, the buoyancy cylinder 23 in the pulsator guide 19 floats due to the level of the washing water, and the upper clutch 25 ) And the lower clutch 41 fall. When the drive motor 17 rotates, the pulsator 15 coupled to the drive shaft 29 rotates to form washing water in the spin basket 13, thereby washing.

When washing is finished and dewatered, a drain motor (not shown) is operated to drain the wash water in the spin basket 13 and the outer 11. When the washing water is drained and the water level in the spin basket 13 is lowered, the upper clutch 25 and the lower clutch 41 are engaged as the buoyancy cylinder 23 inside the pulsator guide 19 moves downward. . Now, when the driving motor 17 rotates, not only the pulsator 15 directly connected to the driving shaft 29 rotates, but also the upper clutch 25 engaged with the spline 35 of the driving shaft 29 rotates. When the upper clutch 25 rotates, the lower clutch 41 meshed with the upper clutch 25 also rotates. Accordingly, the spin basket shaft 31 on which the lower clutch 41 is formed also rotates, so that the spin basket 13 rotates. In this way, as the pulsator 15 and the spin basket 13 rotate, dehydration is performed.

When the dehydration is finished, the power supply to the drive motor 17 is stopped, the drive motor 17 is connected to the power generation braking device (18). Since the power supply is stopped but the drive motor 17 rotates by its own inertia is a single generator, when the voltage generated in the drive motor 17 flows through the power generation braking device 18, the resistance in the power generation braking device 18 is reduced. As the rotational kinetic energy of the driving motor 17 is converted into thermal energy, the driving motor 17 receives a braking force as the work is performed.

Thus, a fixed clutch member integrally rotatable to the spin basket shaft, and a movable clutch member integrally rotated to the drive shaft and slidably movable along the axial direction and integrally rotatable with the fixed clutch member in the lowered state. And a buoyant body which is connected to the movable clutch member and is accommodated in a pulsator and can be elevated according to the water level, and a power generation braking device for braking the rotation of the spin basket shaft. Not only can the structure be simplified by reducing the number of parts, but also the clutch can be reliably switched by the clutch structure.

As described above, according to the present invention, there is provided a washing machine that can simplify the structure by reducing the number of parts related to power transmission and braking of the driving motor, as well as simplifying the clutch structure.

Claims (6)

A casing, an outer tub installed in the casing, a spin basket rotatably installed in the outer tub by a spin basket shaft to receive laundry, a pulsator installed in the spin basket to form a water stream, and the spin In the washing machine having a drive motor for rotationally driving the pulsator through a drive shaft concentric with the basket shaft, A fixed clutch member integrally rotatable to the spin basket shaft; A movable clutch member which is integrally rotated on the drive shaft and slidably moves along the axial direction and is integrally rotatable with the fixed clutch member in a lowered state; A buoyancy body connected to the movable clutch member and accommodated in the pulsator and capable of elevating according to the water level; Washing machine comprising a power generation braking device for braking the rotation of the drive motor. The method of claim 1, Washing machine, characterized in that the movable clutch member and the drive shaft is splined. The method of claim 2, The fixed clutch member and the movable clutch member are plate-like disk portions parallel to each other; And a claw portion which projects from the plate surface of the disk portion and engages with each other. The method according to claim 1 or 2, And the spin basket shaft is formed of a tubular body accommodating the drive shaft to be relatively rotatable. The method of claim 1, Washer, characterized in that the buoyancy body receiving portion for receiving the buoyancy body to the lifting and lowering is formed in the center of the pulsator. The method of claim 5, Washing machine, characterized in that the upper end of the buoyancy receiving portion is dome-shaped.