KR20010079351A - A washing machine with power conversion apparatus - Google Patents

Abstract

PURPOSE: Structure of a power switching device for a washing machine is provided to compact structure and to make repair easy by installing a power transmission unit in a case. CONSTITUTION: A power switching device includes: an upper drum assembly(106) having an upward dehydrating shaft(52) and a fixed shaft(56); a lower drum assembly(108) having a downward dehydrating shaft(54) and an internal gear(30); a driving shaft(18) having a driven pulley(16) rotating by the rotational force of a driving motor(10), a spring clutch(20) switching power to the dehydrating shafts, and a sun gear(22) transmitting rotational force; a power transmission unit engaged with the sun gear to transmit the rotational force of the driving motor to a washing shaft; and a washing shaft(46) fitted into the dehydrating shaft of the upper drum assembly while having a pulsator(100) and a rotating shaft gear engaged with a cam carrier of the power transmission unit. Upon rightward rotation of the driving motor, the spring clutch adheres to the driving shaft and power is simultaneously transmitted to the driving shaft and the downward dehydrating shaft. Thus, dehydrating action is performed. Upon leftward rotation of the driving motor, power is transmitted to the driving shaft except the dehydrating shaft. Then, the pulsator rotates to the left and right. Thus, washing action is performed. Therefore, need for an additional power transmission or switching device is removed and structure is compacted.

Description

Power switching device structure of washing machine {A WASHING MACHINE WITH POWER CONVERSION APPARATUS}

The present invention relates to a structure of a power switch of a washing machine, and more particularly, when switching the rotational power during washing and dewatering operation of the washing machine, by using a power transmission unit of a simple structure to switch the rotational power more efficiently It relates to a power switching device of the washing machine invented to be.

In general, the power switching device of the washing machine is installed inside the case fixed to the bottom of the water tank, and the upper part of the washing drum is coupled to the dehydration shaft connected to the washing tank, and the outer periphery of the brake drum installed so that the brake band can be contacted or separated, and installed inside the brake drum. It is composed of a planetary gear coupled to the rotary shaft in the upper center and coupled to the drive shaft in the lower center, and a spring clutch installed on the outer peripheral surface of the lower end of the brake drum and the outer peripheral surface of the pulley.

The power change device having the above configuration rotates the drive shaft in a state in which the brake drum is stopped by the brake band or one way bearing during washing, and at this time, the spring clutch is kept in a state in which power is not transmitted. It is to transmit the rotational force of the drive shaft only to the wash shaft, and when dewatering, the brake drum is released from the brake band, while the spring clutch is rotated by the drive shaft rotated in one direction to be operated by a separate device installed in a predetermined position It is to transmit the rotational force to the laundry shaft and dewatering shaft.

In addition, a separate magnetic body is installed in addition to the spring clutch, and the power is supplied to the magnetic body to switch the rotational power during washing and dehydration, or to install various manual and automatic levers separately. Many methods of switching power by releasing brake bands have been used.

However, the power changer as described above had to switch the rotational power during washing and dehydration by releasing the brake band from the brake drum by using a separate power changer, which was complicated in structure, and the washing machine motor continuously rotated left and right. As the energy loss increases, overheating occurs and the lifespan is shortened. In addition, since a separate driving device such as a magnetic body or a synchronous motor is installed at a predetermined position, switching between washing and dehydration is performed, and thus, there is a disadvantage in that space cannot be efficiently used due to a complicated structure.

The present invention has been made to solve the above problems, and its object is to provide a power switching device of a washing machine having a simple structure and easy troubleshooting.

In addition, the present invention is to provide a power switching device of the washing machine to facilitate the troubleshooting and handling by installing a separate power transmission unit inside the case.

1 is a cross-sectional view showing a structure of a power switch of the washing machine of the present invention.

Figure 2 is an exploded perspective view showing a power transmission unit of the present invention

Figure 3 is a perspective view showing a power transmission unit of the present invention

4 is an exploded cross-sectional view showing a power transmission unit of the present invention.

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

10: drive motor 12: drive pulley

14 belt 16 driven pulley

18: drive shaft 20: spring clutch

22: sun gear 24: carrier body

26: carrier axis 28: satellite gear

30: internal gear 32: shaft work

34: cam 36: cam housing

38: shaft hole 40: cam carrier body

42: cam carrier gear 44: washing shaft gear

46: laundry shaft 48: top case

50: lower case 52, 54: deshrink

56: fixed shaft

100: pulsator 102: washing tank

104: reservoir 106: upper drum assay

108: lower drum assay 110: satellite gear carrier

112: power transmission unit 114: cam carrier

According to an aspect of the present invention, there is provided a power switching apparatus for a washing machine that selectively rotates a washing shaft and a dehydrating shaft according to a washing and dehydrating stroke, comprising: an upper drum assembly having a dehydrating shaft in an upward direction and a fixed shaft in an inner lower portion thereof; A lower drum assay fixed by the upper drum assay and fixing means, having a dehydration shaft in a downward direction, and having an internal gear at an inner inner edge thereof; It is provided with a driven pulley which rotates by receiving a rotational force by a drive motor at the lower end, and has a spring clutch to switch the power to the dehydration shaft at the suspension, and is fitted to the dehydration shaft of the lower drum assay, A drive shaft having a sun gear for transmitting rotational force; A power transmission unit which is installed to rotate in engagement with the sun gear and transmits rotational power of the driving motor to the washing shaft; It is installed by being inserted into the dehydration shaft of the upper drum assay and receives a rotational force by a power transmission unit, and performs a washing operation. A pulsator provided for washing operation is provided at an upper end, and a lower end of the power transmission unit is installed. And a washing shaft having a washing shaft gear that rotates in engagement with the cam carrier gear.

The power transmission unit may include a satellite gear carrier having a satellite gear that rotates in engagement with the sun gear; A cam coupled to the carrier shaft formed on the satellite gear carrier and rotating; The cam is accommodated and fixed, and has a cam carrier gear to rotate the laundry shaft in engagement with the laundry shaft gear on the top, characterized in that it comprises a cam carrier rotated by a cam rotated by the satellite gear carrier.

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

1 is a cross-sectional view showing a structure of a power switch of the washing machine of the present invention, Figure 2 is an exploded perspective view showing a power transmission unit of the present invention, Figure 3 is a combined perspective view showing a power transmission unit of the present invention, Figure 4 is An exploded sectional view showing a power transmission unit of the present invention.

First, as shown in Figure 1, the power switching device of the present invention is installed inside the top case 48 and the lower case 50 fixed to the bottom of the reservoir 104, the outer periphery of the washing shaft 46 The upper drum assay 106 is installed in contact with the lower drum assay 106, and the lower drum assay 108 is provided at the lower portion of the upper drum assay 106 by fixing means (not shown).

The upper drum assembly 106 is provided with a dehydration shaft 52 in an upward direction, and the laundry shaft 46 is fitted to the dehydration shaft 52. In addition, a fixed shaft 56 is formed at the inner lower portion, and the fixed shaft 56 is fixedly coupled to the shaft hole 38 of the cam carrier 114 to be described later.

A pulsate 100 is installed at an upper end of the washing shaft 46, a washing shaft gear 44 is formed at a lower end of the washing shaft 46, and the pulsator 100 rotates as the washing shaft 46 rotates. The laundry is to be washed. The washing shaft gear 44 is provided to rotate in engagement with the cam carrier gear 42 to be described later.

The lower drum assembly 108 has a dehydration shaft 54 formed in a downward direction, and an internal gear 30 is formed inside.

The dehydration shaft 54 is fitted with a drive shaft 18, which will be described later, and the internal gear 30 is rotatably engaged with the satellite gear 28, which will be described later.

The drive shaft 18 is inserted into the center of the lower case 50 is rotatably installed.

Subsequently, the drive pulley 12 is provided to be rotatable in the lower part of the drive motor 10, and the driven pulley 16 is installed to be rotatable at the lower end of the drive shaft 18, and the drive shaft 18 The sun gear 22 is installed at the upper end, and the driving pulley 12 and the driven pulley 16 are connected to each other by the belt 14. A spring clutch 20 is provided above the driven pulley 16 provided on the drive shaft 18.

The spring clutch 20 is formed such that the winding degree is different from each other in the upper and lower portions, and functions as a clutch while being wound or released according to the rotation direction.

On the other hand, the sun gear 22 formed on the drive shaft 18 is coupled to the satellite gear carrier 110.

The satellite gear carrier 110 is composed of a pair of upper and lower body 24 formed in a disk shape, the satellite gear 28 is fixed between the upper and lower body 24.

The satellite gear 28 is rotated in engagement with the sun gear 22 of the drive shaft 18 is inserted into the inside. At this time, the outer side of the satellite gear 28 is always installed in engagement with the internal gear 30, the satellite gear 28 is rotated in the opposite direction as the sun gear 22 rotates.

Rotation of the drive shaft 18 is performed as follows.

First, the driving pulley 12 rotates in accordance with the operation of the driving motor 10, and the rotational force of the driving pulley 12 is transmitted to the driven pulley 16 by the belt 14, thereby driving the driven pulley 16. Rotation of the drive shaft 18 provided is performed.

The spring clutch 20 uses a spring clutch having a conventional structure having different winding states of upper and lower parts, and the interruption is adjusted by the rotational direction of the drive shaft 18. That is, when the driven pulley 16 received the rotational force by the drive motor 10 rotates in the clockwise direction, the drive shaft 18 with the upper and lower drum assays 106 and 108 and the spring clutch 20 stopped operating. Only the rotation, and the drive shaft 18 is a washing operation is made by rotating the washing shaft 46 through the power transmission unit 112.

In more detail, during washing, if the driven pulley 16 rotates clockwise (the direction in which the spring clutch is released), power is not transmitted to the dehydration shaft 54, and rotational force is transmitted only to the washing shaft 46. Lose. That is, the sun gear 22 installed above the drive shaft 18 rotates, the satellite gear 28 meshed with the sun gear 22 rotates, and the satellite gear carrier 110 including the satellite 28 is rotated. Rotate

When the satellite gear carrier 110 is rotated, the cam 34 installed on the upper portion rotates, the cam carrier 40 is rotated by the cam 34, the cam carrier 40 is rotated as The cam carrier gear 42 and the washing shaft gear 44 mesh with each other so that the washing shaft 46 is rotated to perform washing.

In addition, when the driven pulley 16, which receives the rotational force by the driving motor 10, rotates in the counterclockwise direction, the spring clutch 20 is connected to the dehydration shaft 54 of the lower drum assay 108. As a result, the drive shaft 18 and the dehydration shaft 54 rotate together to rotate the dehydration shaft 52 of the upper drum assay 106 to rotate the washing tub 102 to perform the dehydration operation.

That is, since the lower drum assay 108 is fixed to the upper drum assay 106, the lower drum assay 108 is rotated together with the upper drum assay 106 by the intermittent spring clutch 20 when the drive shaft 18 is rotated. .

The connection structure as described above rotates the washing tub 102 fixed to the outer circumference of the dehydration shaft 52 formed on the upper drum assay 106 as the upper drum assay 106 is rotated, the dehydration operation is performed. Is done.

Subsequently, the power transmission unit 112 of the present invention will be described with reference to FIGS. 2 to 4.

The power transmission unit 112 is a device for transmitting the rotational force of the drive shaft 18 to the washing shaft 46, it is installed inside the top case 48 and the lower case 50.

2 and 3, the power transmission unit 112 includes a satellite gear carrier 110 having a satellite gear 28 to rotate in engagement with the sun gear 22 of the drive shaft 18, and the satellite. A cam 34 installed at an upper portion of the gear carrier 110 and rotating a predetermined eccentric distance, and a cam accommodating portion 36 is formed to accommodate the cam 34 inside the lower portion, and the washing shaft 46 It consists of a cam carrier 114 is installed in engagement with the washing shaft gear 44 formed at the bottom.

In more detail, the satellite gear carrier 110 is composed of a disk-shaped upper and lower carrier body 24, at least one pair of satellite gears 28 at a predetermined distance from the disk-shaped body 24 apart from each other. ) Is formed symmetrically on both sides, the carrier shaft 26 is formed on the carrier body 24, the inner gear portion of the satellite gear 28 meshes with the sun gear 22 fitted in the center. The outer gear portion is provided so that the internal gear 30 meshes with and rotates.

The carrier shaft 26 formed on the upper portion of the carrier body 24 is provided at a distance A from the center of the sun gear 22, that is, the center of the drive shaft 18.

In addition, the cam 34 has a shaft hole 32 is formed so that the carrier shaft 26 is coupled to a portion eccentric distance (B) away from the center, it is repeatedly rotated from side to side around the carrier shaft 26 Do relative exercises.

In addition, the cam carrier 114 has a circular lower body 40 formed with an accommodating part 36 in which a cam 34 is received, and an upper surface of the lower body 40 and a washing shaft gear ( The cam gear 42 is formed to engage with the 44, and the shaft hole 38 formed a predetermined distance (C) away from the center of the cam housing 36.

At this time, the shaft hole 38 is fixed so that the fixed shaft 56 formed inside the upper drum assay 106 is rotatable.

On the other hand, the cam gear 42 provided in the cam carrier 114 is installed to engage with the washing shaft gear 44, the center of the washing shaft gear 44, that is, the washing shaft 46 is constant. Maintain the distance D to engage and rotate.

Operation of the power transmission unit 112 of the above structure is made as follows.

First, when the rotational force is transmitted to the driven pulley 16 as the drive motor 10 operates, the drive shaft 18 rotates, and the sun gear 22 rotates as the drive shaft 18 rotates.

Since the sun gear 22 is engaged with the inner gear part of the satellite gear 28, the satellite gear is rotated, and the satellite gear 28 is fixed to the upper and lower bodies 24 of the satellite gear carrier. Is rotated.

In this case, since the carrier shaft 26 installed on the satellite gear carrier 110 is spaced apart from the driving shaft 18 by a predetermined distance A, the carrier shaft 26 is eccentrically rotated by a predetermined distance A.

When the satellite gear carrier 110 rotates, the cam 34 fixed to the carrier shaft 26 of the satellite gear carrier 110 rotates left and right repeatedly. In other words, the cam 34 makes a repeated relative rotational movement from side to side about the carrier axis 26.

In addition, as the cam 34 repeatedly rotates relative to the left and right about the carrier shaft 26, the cam carrier 114 that accommodates and fixes the cam 34 is centered around the fixed shaft 56. Repeat left and right rotation. That is, since the cam carrier 114 is fixed by the fixed shaft 56 apart from the center of the cam 34 by a constant distance C, the cam carrier 114 is rotated by the repetition of the cam 34 from side to side. ) Is continuously rotated left and right, and the cam gear 42 formed on the cam carrier 114 is rotated by a predetermined angle. That is, the constant left and right rotation is repeated.

When the cam gear 42 is rotated by the structure as described above, the washing shaft gear 44 engaged with the cam gear 42 is rotated to finally rotate the washing shaft 46. As the washing shaft 46 rotates as described above, washing is performed by rotating the connected pulsator 100 as shown in FIG. 1.

As described above, when the drive motor 10 rotates to the right, the spring clutch 20 is in close contact with the drive shaft 18 so that power is simultaneously transmitted to the drive shaft 18 and the dewatering shaft 54 so that the dehydration operation occurs. When the 10 turns left, the pulsator connected to the washing shaft 46 by the operation of the power transmission unit 112 as the spring clutch 20 is released from the drive shaft 18 and power is transmitted only to the drive shaft 18. The washing operation is performed by repeating the rotational motion of the 100.

If the winding direction of the spring clutch 20 is reversed, the driving direction of the driving motor 10 causing washing and dehydration will be reversed as described above.

That is, according to the rotational direction of the drive motor 10, as the washing and dehydration stroke is made, the operation for rotating the washing shaft 46 is made by the power transmission unit 112, a device for transmitting or switching power separately There is an advantage that the structure is simplified since it is not necessary.

The present invention is not limited to the above-described preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the invention as claimed in the claims. Of course, such modifications will be within the scope of the claims as key elements of the invention.

As described above, the present invention has the advantage that the performance of the washing machine is improved and the number of parts is reduced by simply switching the operation during washing and the operation during dehydration according to the rotational direction of the drive motor.

In addition, there is an effect that there is little trouble or malfunction, so that almost no repair is necessary.

Claims (2)

In the power switching device of the washing machine to selectively rotate the washing shaft and dewatering shaft according to the washing and dehydration administration, An upper drum assembly having a dehydration shaft in an upward direction and having a fixed shaft at an inner lower portion thereof; A lower drum assay fixed by the upper drum assay and fixing means, having a dehydration shaft in a downward direction, and having an internal gear at an inner inner edge thereof; It is provided with a driven pulley which rotates by receiving a rotational force by a drive motor at the lower end, and has a spring clutch to switch the power to the dehydration shaft at the suspension, and is fitted to the dehydration shaft of the lower drum assay, A drive shaft having a sun gear for transmitting rotational force; A power transmission unit which is installed to rotate in engagement with the sun gear and transmits the rotational power of the driving motor to the washing shaft; It is installed by being inserted into the dehydration shaft of the upper drum assay and receives a rotational force by a power transmission unit, and performs a washing operation. A pulsator provided for washing operation is provided at an upper end, and a lower end of the power transmission unit is installed. And a washing shaft having a washing shaft gear that rotates in engagement with the cam carrier gear. The method of claim 1, The power transmission unit includes a satellite gear carrier having a satellite gear that rotates in engagement with the sun gear; A cam coupled to the carrier shaft formed on the satellite gear carrier and rotating; The cam is accommodated and fixed, having a cam carrier gear to rotate the laundry shaft in engagement with the washing shaft gear on the top, and comprises a cam carrier rotated by a cam rotated by a satellite gear carrier Power changer.