KR20030080760A - Clutch for Washer - Google Patents

Abstract

PURPOSE: A clutch for a washing machine is provided to simplify the structure of a power-switching unit of selectively transmitting power of the washing machine to a washing shaft and a dehydrating shaft. CONSTITUTION: A clutch for a washing machine has a pulley(10) rotating by a motor; a washing shaft assembly(6) the upper end of which is fixed to a washing vane(4) rotatably installed to the lower part of a wash tub(3) and the lower end of which is fixed to the pulley; a dehydrating shaft assembly(7) the upper end of which is fixed to the lower part of the wash tub; a brake lever(21) stopping the rotation of the dehydrating shaft assembly; a clutch lever(22) connected with the brake lever; and a power-switching unit of selectively transmitting power of the motor to the dehydrating shaft assembly according to the operation of the brake lever. The power-switching unit comprises a pulley boss fixed to the pulley under the lower end part of the dehydrating shaft assembly; a coupling member(14) movably installed to the lower end part of the dehydrating shaft assembly and to the outside of the pulley boss, to combine and separate the lower end part of the dehydrating shaft assembly and the pulley boss; an elastic member giving elastic force to the coupling downwardly; and an operating member(19) combined to the end of the clutch lever. The operating member horizontally moves according to operation of the clutch lever and vertically moves the coupling member.

Description

Clutch for Washer

The present invention relates to a clutch for a washing machine, and more particularly, to a new type of washing machine clutch that simplifies the structure of the power switching means for selectively transmitting the power of the washing machine to the washing shaft and deshrink.

In general, washing machines use various kinds of contaminants attached to clothes and bedding by emulsifying detergents, friction of water flows due to rotation of washing blades called pulsators, and impact effects of pulsators on laundry. It is a home appliance to remove.

These washing machines are provided with a clutch as a power transmission device for selectively transmitting and rotating the rotational force of the motor to the washing tank in which the laundry is contained and the washing blade inside the washing tank, and the clutch reduces the rotational force of the motor to the washing wing. In order to achieve this, a washing shaft coupled with the reduction gear assembly and the washing blade are provided.

1 of the accompanying drawings shows a structure of a conventional washing machine clutch, a gear shaft 31 is installed on the clutch pulley 10 that receives power from a driving motor (not shown) of the washing machine, and the gear shaft 31 A washing shaft 32 is installed at the upper part, and a dehydration shaft 33 is installed at the outside of the washing shaft 32.

The lower end of the dehydration shaft 33 is fixed to the brake drum 34 serving as the upper gear housing, and the lower gear housing 35 is coupled to the lower portion of the brake drum 34, and the power is decelerated inside the brake drum 34. Gear unit 37 is installed.

Here, the gear shaft 31, the gear unit 37 and the washing shaft 32 is rotated to form a series of washing shaft assembly, the lower gear housing 35, the brake drum 34 and the dehydration shaft 33 ) Rotates together in a series of deshrinkable assemblies.

In addition, the lower end of the clutch is provided with a power switching means for selectively transmitting the rotational force of the pulley 10 in the laundry mode and dehydration mode to the laundry shaft assembly and the dewatering assembly, the power switching means is a gear shaft The spring block 38 and the clutch boss 39 are fixed to the lower end of the 31, and the brake lever 21 is interlocked around the brake drum 34 in accordance with the operation of the drain valve actuation solenoid (not shown). Is installed, the clutch lever 22 is installed on one side of the brake lever 21 to interlock when the brake lever 21 is operated, the lower end of the clutch lever 22 is interlocked when the clutch lever 22 is operated Rotating working cam 25 is installed is configured.

The clutch of the conventional washing machine configured as described above operates as follows.

First, in the washing mode, since the solenoid valve is in an off state, the clutch lever 22 is pushed by the operation of the brake lever 21, and the clutch boss 39 is engaged with the operation cam 25 interlocked with the clutch spring. 40 is pushed in the direction of increasing diameter.

Accordingly, the clutch spring 40 having an increased diameter maintains a state spaced apart from the outer circumferential surface of the spring block 38.

Therefore, the rotational force of the motor (not shown) is transmitted to the pulley 10 installed in the clutch by the belt (not shown) and then to the gear shaft 31 connected thereto, and the washing shaft connected to the upper portion of the gear shaft 31 again. It is delivered to the washing blade (not shown) through 32 to rotate the washing blade.

In addition, in the dehydration mode, the solenoid valve operates in the state in which the washing water in the washing tank (not shown) of the washing machine is naturally drained, and when the brake lever 21 is pulled, the operation cam 25 is interlocked with the clutch lever 22 to operate the clutch boss. The diameter of the clutch spring 40 decreases as it is separated from the serration of 39, and the clutch spring 40 simultaneously moves the lower gear housing 35 and the spring block 38 by the restoring force. Will be clamped.

In this state, when the gear shaft 31 that receives the rotational force of the motor (not shown) rotates, the spring block 38 fixed to the gear shaft 31 rotates like the gear shaft 31. Since the clutch spring 40 clamping the spring block 38 and the lower gear housing 35 rotates in the winding direction, the clutch spring 40 exhibits a stronger clamping force so that the brake drum 34 and the gear unit 37 do not slip. Rotated.

Therefore, during dehydration, the rotational force transmitted from the driving motor (not shown) to the clutch is transmitted not only to the washing shaft 32 but also to the dehydrating shaft 33 to rotate the washing blade and the washing tank at a high speed to proceed with dehydration.

On the other hand, when dehydration stops, the brake lining 36 is in close contact with the outer circumferential surface of the brake drum 34 to forcibly brake the brake drum 34 to stop the washing tank.

However, the conventional clutch for a washing machine as described above has a complicated structure of the power switching means provided at the lower end of the clutch to selectively transmit the driving force of the motor to the washing shaft assembly and the dewatering assembly in the washing mode and the dehydrating mode. There was a problem that the production is difficult and the production cost rises.

Accordingly, the present invention has been made to solve the above problems, a new form having a simplified structure than the existing by improving the structure of the power switching means for selectively transmitting the driving force of the washing machine motor to the washing shaft and dewatering shaft It is an object of the present invention to provide a washing machine clutch having a power switching means.

1 is a cross-sectional view of the main part showing a conventional clutch structure for a washing machine.

2 is a sectional view of main parts of a washing machine showing a clutch structure for a washing machine according to the present invention;

3 is a cross-sectional view and a bottom view schematically showing the structure of the clutch for the washing machine of Figure 2 and the operation in the washing mode;

4 is a cross-sectional view and a bottom view schematically showing the structure of the clutch for the washing machine of Figure 2 and the operation in the dehydration mode.

Explanation of Reference Symbols in Major Parts of Drawings

1: outer tub 3: washing tub

4: washing wing 6: washing shaft assembly

7: deshrinkable assembly 8: drive motor

9: clutch 10: pulley

11: upper serration part 12: pulley boss

13 lower serration part 14 coupling member

15: inclined surface portion 16: inner serration portion

18: compression coil spring 19: operating member

20: inclined surface portion

In order to achieve the above object, the present invention, a pulley that is rotated by a motor, the upper end is fixed to the washing blade rotatably installed in the lower part of the washing tank, the lower end is fixed to the pulley and the washing shaft assembly, the upper end of the washing tank A dehydration assembly fixed to the outer circumference of the laundry shaft assembly, a brake lever for stopping rotation of the dehydration assembly, a clutch lever connected to the brake lever, and a dehydration assembly according to the operation of the brake lever. And a power switching means for selectively transmitting power of the motor, wherein the power switching means comprises: a pulley fixed to the pulley directly under the lower end of the deshrinkable assembly, and a lower end of the deshrinkable assembly. And installed on the outside of the pulley boss so as to be movable up and down. A coupling member for engaging and releasing the lower end with the pulley boss, an elastic member for applying an elastic force downward to the coupling member, coupled to the clutch lever end, and moved horizontally in accordance with the operation of the clutch lever, the end of which is coupled to the coupler. It provides a clutch for a washing machine comprising a working member for moving the coupling member up and down while being in contact with and separated from one side of a ring member.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the clutch for a washing machine according to the present invention.

First, referring to the structure of the washing machine to which the clutch of the present invention is applied, as illustrated in FIG. 2, an outer tub 1 for storing the washing water is installed outside the washing tub 3 in which the laundry is contained, and the washing tub 3 is provided. The washing blade 4 is rotatably installed at the lower portion of the washing blade 4, and the upper end of the washing shaft assembly 6 of the clutch 9 is fixed to the hub 5 of the washing blade 4 and the lower portion of the washing tank 3. The upper end of the deshrinkable assembly 7 of the clutch 9 is fixed.

In addition, a lower portion of the outer tub 1 is provided with a drive motor 8, which is connected to the pulley 10 of the clutch 9 by a V belt 24.

3 and 4, the lower end of the washing shaft assembly 6 of the clutch 9 is fixed to the pulley 10, and the dehydrating assembly 7 has gears on the outer peripheral surface of the lower end thereof. The upper serration part 11 is integrally formed, and a pulley boss 12 having a lower serration part 13 having a gear shape on the outer circumferential surface of the pulley 10 is formed directly below the lower end of the deshrinkable assembly 7. Fixedly coupled to the

In addition, the lower end of the clutch 9, the hollow cylindrical coupling member 14 surrounding the lower end of the deshrinkable assembly 7 and the outer side of the pulley boss 12 is installed to be movable up and down, The coupling member 14 has an inner serration portion 16 formed on its inner circumferential surface so as to correspond to the upper serration portion 11 and the lower serration portion 13, and the coupling member 14. On the outer circumferential surface of the inclined inclined surface portion 15, which is inclined downward, is formed to protrude integrally along the circumferential direction.

In addition, the coupling member 14 is downwardly supported by a compression coil spring 18 whose upper end is supported by the deshrinkable assembly 7 and the other end is inserted into and supported by the groove 17 above the coupling member 14. It is configured to receive elastic force.

One side of the coupling member 14 has an operating member 19 for moving the coupling member 14 up and down while moving horizontally in conjunction with the operation of the clutch lever 22 connected to the brake lever 21. The operating member 19 is provided so that one end is coupled to the end of the clutch lever 22 and the other end is connected to the inclined surface portion 15 of the coupling member 14, and the coupling member ( 14, the end of the operation member 19 which is in contact with the inclined surface portion 20 is bent upward so as to smoothly enter the inclined surface portion 15 corresponding to the inclined surface portion 15 of the coupling member 14 To achieve.

The washing machine clutch of the present invention configured as described above operates as follows.

First, in the washing mode, as the clutch lever 22 is pushed by the operation of the brake lever 21 as shown in FIG. 3, the end of the operating member 19 is inclined 15 of the coupling member 14. Will enter. At this time, the actuating member 19 forms the inclined surface portion 20 whose curved end thereof is curved to maintain the smooth contact with the inclined surface portion 15 of the coupling member 14 while maintaining the coupling member 14. Is raised.

Accordingly, as the coupling member 14 rises as described above, the coupling member 14 is released from the lower serration portion 13 of the pulley boss 12 while the upper serration of the deshrinkable assembly 7 is released. Only the portion 11 is in a coupled state.

In this state, when the power of the drive motor 8 is transmitted to the pulley 10 and the pulley 10 rotates, the washing shaft assembly 6 coupled thereto rotates and the washing blade 4 (see FIG. 2). Rotate At this time, since the coupling member 14 is released from the pulley boss 12, the rotational force of the pulley boss 12 is not transmitted to the deshrinkable assembly 7.

In addition, as shown in FIG. 4, in the dehydration mode, the clutch lever 22 is pulled by the operation of the brake lever 21, and the operating member 19 is separated from the inclined surface portion 15 of the coupling member 14. It becomes the state that became.

Accordingly, the coupling member 14 elastically supported by the compression coil spring 18 is lowered so that the inner serration portion 16 of the upper serration portion 11 and the pulley boss of the deshrinkable assembly 7 are lowered. It is combined with the lower serration part 13 of (12).

In this state, the power of the driving motor 8 is transmitted to the pulley 10 so that when the pulley 10 rotates, the washing shaft assembly 6 and the pulley boss 12 coupled thereto rotate together. Since the upper serration portion 11 of the contracting assembly 7 is coupled to the pulley boss 12 by the coupling member 14, the rotational force of the pulley boss 12 is transmitted to the deshrinkment assembly 7 as it is. Thus, the washing tank 3 (see Fig. 2) is rotated to dehydrate.

As described above, according to the present invention, since the configuration of the power switching means for selectively transferring the power of the motor to the washing shaft assembly and the deshrinkment assembly in the washing mode and the dehydration mode is easy to manufacture and maintain, This can reduce costs.

Claims (5)

A pulley that is rotated by a motor, a washing shaft assembly having an upper end fixed to a washing blade rotatably installed at a lower part of the washing tank, and a lower end fixed to the washing pulley, and an upper end fixed to the lower part of the washing tank and surrounding the outside of the washing shaft assembly. And a power switch for selectively transmitting power of the motor to the deshrinkable assembly according to the operation of the brake lever, a brake lever for stopping rotation of the deshrinkable assembly, a clutch lever connected to the brake lever, and the brake lever. In having a means, The power switching means, a pulley boss fixed to the pulley immediately below the lower end of the de-shrinkable assembly, the lower end of the de-shrinkable assembly and the lower side of the pulley boss is installed so as to be movable up and down the lower portion of the de-shrinkage assembly A coupling member for engaging and releasing a pulley boss, an elastic member for applying an elastic force downward to the coupling member, coupled to an end of the clutch lever, and moved horizontally according to the operation of the clutch lever, the end of which is coupled to the coupling member A clutch for a washing machine comprising an operating member for moving the coupling member up and down while being in contact with and separated from one side of the coupling member. According to claim 1, wherein the serration of the gear shape is formed on the outer peripheral surface of the lower end of the de-shrinkable assembly, the gear-shaped serration portion is formed on the outer peripheral surface of the pulley boss, the inner peripheral surface of the coupling member A clutch for a washing machine, characterized in that a deshrinkable assembly and an inner serration portion corresponding to the serration portion of the pulley boss are formed. According to claim 1 or claim 2, characterized in that the inclined surface portion which is inclined downward along the outer peripheral surface of the coupling member, the operating member is characterized in that the inclined surface portion corresponding to the inclined surface portion of the coupling member is formed at the end thereof Clutch for washing machine. The washing machine clutch of claim 3, wherein the inclined surface portion of the coupling member is formed to be bent downward, and the inclined surface portion of the actuating member is formed to be curved upward. A pulley rotated by a motor, a washing shaft assembly having an upper end fixed to a lower washing vane rotatably installed under the washing tank, and a lower end fixed with the pulley, and an upper end fixed to the lower washing tank and surrounding the outside of the washing shaft assembly. And a brake lever for stopping the rotation of the deshrinkage assembly, a clutch lever connected to the brake lever, and a power for selectively transmitting power of the motor to the deshrinkage assembly according to the operation of the brake lever. In having a switching means, The power switching means may include: a pulley boss fixed to the pulley at a lower side of the lower end of the deshrinkable assembly and having a lower serration formed in a gear shape on an outer circumferential surface thereof; an upper serration part formed on an outer circumferential surface of the lower end of the deshrinkable assembly; It is installed to be movable up and down on the lower end of the de-shrinkage assembly and the outer side of the pulley boss, the inner serration portion corresponding to the upper and lower serration portion is formed on the inner circumferential surface, the inclined inclined surface portion is formed when the outer circumferential surface is curved downward A coupling member; A compression spring for applying an elastic force downward to the coupling member; It is coupled to the end of the clutch lever, the inclined surface portion corresponding to the inclined surface portion of the coupling member is formed at one end, and includes an operating member to move horizontally and move the coupling member up and down in accordance with the operation of the clutch lever Clutch for a washing machine, characterized in that configured.