KR0152330B1 - Power conveying apparatus of a washing machine - Google Patents

Abstract

The present invention relates to a power transmission device for a washing machine, and to provide a power transmission device for a washing machine having a function of simultaneously performing dehydration stop with low noise and suppressing idling of the washing tank during washing. The power transmission device according to the present invention is a hollow deshrinkment to receive the rotational force of the motor to rotate the washing tank, one side is coupled to the pulley inside the dehydration shaft, the other side is coupled to the washing shaft, the lifting and lowering movement while demounting Slider that combines or separates the contraction and washing shaft, Dehydration shaft and slider is integrally installed with the dehydration shaft between the slider and the dehydrator and the slider, Clutch bearing and clutch installed between the washing shaft and the slider to detach the washing shaft and the slider The elevating member for guiding the elevating, the shoe provided between the elevating member and the dewatering shaft, the second spring for elastically supporting the elevating member to the dehydrating side, and elevating control means for elevating the elevating member.

Description

Power train of washing machine

The present invention relates to a power transmission device for a washing machine, and more particularly, to a power transmission device for a washing machine that simultaneously performs an anti-idle of the washing tank during washing and a braking function of the washing tank during dehydration.

In the conventional power transmission device of the washing machine, as shown in FIG. 1, the upper end is coupled to the washing tank 1b, and the lower end is pulley 4 to transmit the rotational force of the motor (not shown) to the washing tank 1b. A hollow dewatering shaft 2b extending to the upper side of the dehydrating shaft 2b is provided, and a washing shaft 2a having upper and lower ends thereof coupled to the stirrer 1c and the pulley 4 is installed inside the dewatering shaft 2b, respectively. It is.

The housing 3 is installed between the pulley 4 and the water tank 1a, and bearings 7 supporting the dehydration shaft 2b are press-fitted on the upper and lower sides of the housing 3, and inside the housing 3 The planetary gear part 2c which is formed integrally with the dehydration shaft 2b and which changes the rotational speed of a motor (not shown) is provided. The one-way spring 6 is installed at the upper portion of the planetary gear portion 2c, and a fixed end 8 supporting the one-way spring 6 is installed at one side of the housing 3, and the pulley 4 and the dehydration shaft 2b. ), The clutch spring 5a for winding or unwinding to couple or separate the dehydration shaft 2b to the pulley 4 and the clutch lever 5b for adjusting the clutch spring 5a to be wound or released are provided.

On the other hand, the outer peripheral surface of the planetary gear portion (2c) is provided with a brake band (9a) for providing a washing tank 1b, a brake lever (9b) for adjusting it is provided on one side of the brake band (9a).

Looking at the action of the power transmission device of the conventional washing machine configured as described above are as follows.

First, when washing, the brake lever 9b and the clutch lever 5b are in an unlocked state, the brake band 9a is in contact with the planetary gear portion 2c, and the brake is in a braking state, and the clutch spring 5a is in an unlocked state. ) And washing shaft 2a are separated. In this state, when power is applied to the motor (not shown) and the washing shaft 2a connected thereto is rotated, the stirrer 1c is rotated to perform the washing stroke. At this time, the washing tank 1b is to be rotated by the laundry and the water flow, the one-way spring 6 and the brake band 9a cooperate to suppress it.

On the other hand, during dehydration, the brake lever 9b and the clutch lever 5b are pulled to release the braking force of the brake band 9a, and the clutch spring 5a is wound so that the washing shaft 2a and the dehydration shaft 2b are closed. Perform rotational dehydration stroke integrally.

At the time of dehydration stop or power failure, the pulled brake lever 5b is released, and the brake band 9a exerts a braking force to stop the rotation of the washing tank 1b.

However, such a power transmission device of the conventional washing machine generates noise during braking of the brake band 9a, and there is a difference in braking force depending on the direction of the brake band 9a, and thus, braking force to prevent idling of the washing tank 1b. A part that reinforces this weak direction, ie a one-way spring 6, must be additionally mounted. However, this one-way spring (6) has a problem that the stress is concentrated in the fixed end when the idling of the washing tank (1b) is broken, a problem occurs.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a power transmission device for a washing machine having a function of simultaneously performing dehydration stop with low noise and suppressing idling of the washing tank during washing.

1 is a cross-sectional view of a power transmission device showing an internal configuration of a conventional washing machine power transmission device.

Figure 2 is a side cross-sectional view of the washing machine showing the internal configuration of a washing machine employing a power transmission device according to the present invention.

3 is a half sectional view of a power transmission device according to the present invention.

4 is a partial plan view of the rotating plate portion seen in the direction A of FIG.

Figure 5 is a half sectional view showing a state when dehydration of the power transmission device according to the present invention.

6 is a state diagram at the time of dehydration of the rotating plate portion shown in FIG.

7 is a cross-sectional view taken along line VII-VII 'of FIG.

* Explanation of symbols for main parts of the drawings

21: washing shaft 22: dewatering

23: planetary gear 24: upper bearing

24 ': Lower bearing 25: Pulley

26 housing 31 slider

32: clutch gear 33: clutch bearing

34: outer ring 35: inner ring

36: first spring 41: brake liner

42: brake shoe 43: lifting member

44: second spring 51: plate member

52: fixing pin 53: guide pin

54: third spring

In order to achieve the above object, a washing machine of the present invention includes a main body provided with a water tank storing washing water therein, a washing tank provided in the water tank, an agitator provided in the washing tank for washing laundry while rotating forward and reverse, and the washing tank. Combined and provided with a hollow shaft, the washing shaft coupled to the stirrer through the hollow, the motor for transmitting power to the washing shaft, when the dehydration combined the washing shaft and the washing shaft by combining the washing shaft and the stirrer together In the washing machine having a power transmission means for rotating,

The power transmission means is a clutch bearing provided on one side of the washing shaft,

A slider installed adjacent to the dehydration shaft so as to be lowered when dewatered and coupled to the clutch bearing and ascended during washing to separate from the clutch bearing;

A clutch gear coupled to one side of the dehydration shaft so that when the clutch bearing and the slider are coupled to each other by the slider, the power of the washing shaft is transmitted to the dehydration shaft when the clutch bearing and the slider are coupled;

A solenoid generating power to raise and lower the slider,

It is characterized in that it is provided with a lift control means for transmitting the power of the solenoid to the slider.

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

2 is a side cross-sectional view of the washing machine employing the power transmission device 20 according to the present invention, as shown in this, the body 10 is provided with a water tank 11 for fresh water wash therein, The washing tank 12 into which the laundry is put is installed in the water tank 11, and an agitator 13 is installed inside the washing tank 12 to wash the laundry by rotating forward and reverse.

And the motor 14 for rotating the stirrer 13 and the washing tank 12 is provided below the water tank 11, The speed | rate suitable for washing or dewatering the rotation speed of the motor 14 in the side of the motor 14 is provided. The power transmission device 20 is installed to rotate the stirrer 13 and the washing tank 12 at the same time, or to select the stirrer 13.

As shown in FIG. 3 and FIG. 5, the power transmission device 20 includes a case 26 having an upper side fixed to the water tank 11, and a motor 14 at a lower end of the case 26. Pulley 25 for receiving the rotational force of the belt through the 15 is installed.

And inside the case 26, the upper end thereof is coupled to the washing tank 12, the lower end is provided with a hollow dehydration shaft 22 extending to the pulley 25, the inside of the dehydration shaft 22 The lower end is provided with a washing shaft 21 coupled to the stirrer 13 and the pulley 25, respectively.

The dehydration shaft 22 is integrally provided with a planetary gear unit 23 so as to change the rotational speed of the washing shaft 21 at a speed suitable for washing, and the upper side of the dehydration shaft 22, that is, the case 26. An upper bearing 24 is press-fitted at an upper end of the support to rotatably support the dewatering shaft 22.

In addition, a slider 31 for coupling or separating the washing shaft 21 and the dehydrating shaft 22 is provided on the outer side of the dewatering shaft 22 and the washing shaft 21.

As shown in FIG. 7, between the slider 31 and the dehydration shaft 22, a clutch gear 32 that is serrated coupled to the dehydration shaft 22 and rotates integrally is provided. It is to be separated or separated from (31).

In addition, between the slider 31 and the washing shaft 21, the clutch bearing 33 is capable of rotating in only one direction and is capable of transmitting power. The clutch bearing 33 has a washing shaft ( 21 and the slider 31 are engaged or separated, and the inner ring 35 integrally provided with the washing shaft 21 is coupled to the outside, and the slider 31 has a clutch bearing when the slider 31 is lowered ( The outer ring 34 is provided to correspond to the inner ring 35 so as to engage with the outer ring 33. The inner ring 35 and the outer ring 34 taper in parallel toward the washing shaft 21 toward the upper side so that a clearance is generated between the inner ring 35 and the clutch bearing 33 when the outer ring 34 moves upward. The bearing 33 and the outer ring 34 are to be separated.

The plate-shaped first spring 36 is installed below the inner ring 35 so that the slider 31 elastically supports the clutch bearing 33 when the outer ring 34 is engaged with the clutch bearing 33 when the slider 31 descends downward. will be.

On the other hand, the elevating member 43 for raising and lowering the slider 31 is installed outside the slider 31, and a lower bearing 24 'is press-fitted between the slider 31 and the elevating member 43. The lowering member 43 moves only up and down with the slider 31, and the outer end of the lowering member 43 is in close contact with the case 26.

The brake liner 41 with the shoe 42 is integrally installed on the upper surface of the elevating member 43, and the shoe 42 is attached to the dewatering shaft 22 opposite to the brake liner 41. The braking force is exerted by these contacts.

The second spring 44 supported by the spring fixing part 45 is installed at the lower part of the elevating member 43, and the shoe 42 is in contact with each other by supporting the elevating member 43 upwardly and elastically. have. At this time, the spring fixing portion 45 is made of a screw type to be able to adjust the elastic force of the second spring (44).

On the other hand, the side of the elevating member 43, as shown in Figs. 4 and 6, the elevating control means for raising and lowering the elevating member 43 is provided, which rotates and slides The guide hole 56 is formed to be inclined downward in the case 26, and the rotating plate 55 is restored to its original state to guide the third spring 54 of the torsion type to elevate the elevating member 43.

In more detail, the guide plate 52 through which the rotary plate 55 and the elevating member 43 are combined to move integrally is installed to penetrate the guide hole 56, and the rotary plate 55 and the guide pin. Both ends of the pair 52 are coupled to each other, and a third spring 54 having elastic restoring force is formed by the rotational movement of the rotary plate 55. A sliding bush is formed on the guide pin 52 corresponding to the guide hole 56. 58 is installed to guide the rotation of the guide pin (52).

In addition, the link plate 61 is connected to the rotating plate 55, and a solenoid 62 is installed at one side of the link 61 to pull the rotating plate 55 to rotate and slide.

On the other hand, the plate-shaped member 51 is installed at one end of the guide hole 56, the fixing member 52 is provided in the plate-like member 51, the fixing plate 57 is provided in the corresponding rotating plate 55 It is formed so as to prevent excessive rotation of the rotating plate 55.

Referring to the operation of the power transmission device 20 of the washing machine according to the present invention configured as described above are as follows.

First, the state of the power transmission device 20 during washing is as shown in FIG. 3 and FIG. 4, the elevating member 43 is located on the upper side, and the shoe 42 is in contact with the slider 31. In addition, the clutch gear 32 is separated, and at the same time the slider 31 and the outer ring 34 are also located on the upper side, and a clearance is generated between the outer ring 34 and the clutch bearing 33 so that the washing shaft 21 and The slider 31 is separated.

In this state, when laundry is put into the washing tank 12 and power is supplied to the motor 14, the rotational force of the motor 14 is transmitted to the stirrer 13 through the washing shaft 21, and the stirrer 13 is forward and reverse. It is to wash the laundry while rotating. At this time, the washing tank 12 also tends to rotate due to the rotating water stream and the laundry, which is suppressed by the shoe 42 in contact with the dehydration shaft 22 provided integrally with the washing tank 12.

Subsequently, when the washing cycle is finished and the dehydration stroke is performed, as shown in FIGS. 5 and 6, when the power is applied to the solenoid 62 and pulls the rotating plate 55 through the link 61, the rotating plate ( 55 is rotated out of the fixing pin 52, and then slides, and as the guide pin 52 moves along the downwardly inclined guide hole 56, the elevating member 43 is lowered and the shoe 42 is lowered. Are separated.

When the slider 31 descends while the slider 31 and the clutch gear 32 are engaged, the outer ring 34 and the clutch gear 33 are in close contact with each other, and the inner ring 35 having the power coupled to the washing shaft 21. And the power is transmitted to the dehydration shaft 22 through the clutch gear 32 through the slider 31, so that the washing shaft 21 and the dehydration shaft 22 are integrated. The dehydration stroke is performed by turning to.

On the other hand, when the power supply of the solenoid 62 is short-circuited during dehydration administration or power failure, releasing the pulled link 61, the guide pin is driven by the third spring 54 having elastic restoring force by the rotation of the rotating plate 55. At the same time as the 52 is restored to the initial state, the elevating member 43 is elevated by the second spring 44, and the inner ring 35 and the outer ring 34 are separated, whereby the rotational force of the dehydration shaft 22 is cut off. At the same time, the shoe 42 contacts and exerts a braking force to stop the washing tank 12.

As described in detail above, the power transmission device of the washing machine according to the present invention has a one-way clutch for preventing forward and reverse rotation of the washing tank by mounting a brake mechanism that simultaneously performs a brake function to stop dehydration and a function of suppressing idle running of the washing tank. The problem of the spring breakage, the difficulty of the work and the clutch breakage due to the load are solved, and the noise problem when the band brake is applied when the dehydration stops.

Claims (6)

The main body 10 is provided with a water tank to wash the water stored therein, the washing tank 12 provided in the interior of the tank, the agitator 13 is provided in the inside of the washing tank while washing the laundry while rotating forward and reverse, combined with the washing tank and hollow Dehydration shaft 22 having a, washing shaft 21 coupled to the stirrer to penetrate the hollow, the motor 14 to transfer power to the washing shaft, when dehydration and the washing shaft by combining the dehydration shaft and the In the washing machine having a power transmission means for rotating the washing tank and the stirrer, the power transmission means is a clutch bearing 33 provided on one side of the washing shaft, lowered when dewatering is coupled with the clutch bearing, ascending during washing Slider 31 installed adjacent to the dewatering shaft so as to be separated from the clutch bearing, and the slider is bitten by the slider so that the clutch bearing and the slider are formed. Clutch gear 32 coupled to one side of the dehydration shaft to transfer power of the washing shaft to the dehydration shaft, a solenoid 62 generating power to move the slider up and down, and the power of the solenoid to the slider. Washing machine characterized in that it is provided with a lift control means for transmitting. According to claim 1, wherein the washing shaft is provided with an inner ring (35) whose outer side is tapered, and the clutch bearing is provided to the outside of the inner ring, the slider has an inner ring tapered in parallel with the outer side of the inner ring ( 34) is installed so that the clearance gap between the clutch bearing and the outer ring is generated when the outer ring is lifted to block the transmission of power from the inner ring to the outer ring. According to claim 1, The elevating control means is a case formed with a downwardly inclined guide hole 56, the guide pin 53 is coupled to one side of the elevating member extending from one side of the slider through the guide hole ), Coupled to the guide pin is installed on the rotating plate 55 for transmitting the power of the solenoid to move the guide pin along the guide hole, both ends of the guide pin and the rotating plate is fixed to the guide pin, respectively Washing machine comprising a third spring (54) for elastically restoring. The washing machine according to claim 3, wherein a sliding bush (58) is provided at an outer side of the guide pin corresponding to the guide hole to guide the movement of the guide pin in the guide hole. According to claim 3, wherein the rotating plate is provided with a fixing groove 57, characterized in that provided with a plate-like member 51 provided with a fixing pin 52 corresponding to the fixing groove to limit the rotation of the rotating plate. washer. The shoe spring of claim 1, wherein the shoe 42 coupled to the slider to brake the dehydration shaft in contact with the dehydration shaft when the slider is raised and a second spring elastically supported by the shoe to closely contact the dehydration shaft ( 44) A washing machine comprising: a.