KR0126731Y1 - Power transfer apparatus of a washing machine - Google Patents

Abstract

The present invention relates to a power transmission device for a washing machine, and an object thereof is to provide a power transmission device for a power washing machine having a function of performing dehydration stop and suppressing idle running of a washing tank during washing. The power transmission device of the washing machine according to the present invention, the washing tank 12 into which the laundry is put, the stirrer 13 to wash the laundry while rotating inside the washing tank, the motor 14 for rotating the washing tank and the stirrer, the motor The hollow dewatering shaft 23 for transmitting the rotational force to the washing tank, the washing shaft 22 provided inside the dewatering shaft to transmit the rotational force of the motor to the stirrer, the brake drum 31 integrally provided with the dewatering shaft, and detachable to the brake drum The brake plate 33 is provided so as to brake the dehydration shaft in cooperation with the brake drum to restrain the idling of the washing tank and to brake the washing tank when dehydration stops, and the springs 35 and 35 'elastically supporting the brake plate to be in close contact with the brake drum. And a lever 51 for adjusting the attachment and detachment of the brake drum and the brake plate by reciprocating the brake plate.

Description

Power train of washing machine

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 the washing machine employing a power transmission device according to the present invention.

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

4 is a sectional view taken along the line iv-iv of FIG.

Figure 5 is a half cross-sectional view of a power train showing a guide employed in the present invention.

6 is a state diagram at the time of dehydration of the power transmission device according to the present invention.

7 is an operating state diagram of the lever shown in FIG. 3 and FIG.

* Explanation of symbols for main parts of the drawings

21: pulley 22: laundry shaft

23: deshrinkage 24: planetary gear

25: bearing 26a: clutch spring

26b: clutch lever 27: housing

28: Boss 31: Break Drum

32,33: brake shoe 33: brake plate

40: lifting member 41: support portion

42: piston 43: fluid movement hole

51: brake lever 52: fixed pin

53: moving pin 61: container

The present invention relates to a power transmission device of a washing machine, and more particularly, to a power transmission device with a brake for restraining idle running of a washing tank and braking for dehydration.

The power transmission device of the conventional washing machine is shown in Figure 1, the upper end thereof is coupled to the washing tank 1b through the water tank (1a), the lower end of the hollow formed extending to the upper side of the pulley (4) The dehydration shaft 2b is installed, and inside the dehydration shaft 2b, a washing shaft 2a having upper and lower ends coupled to the stirrer 1c and the pulley 4 is installed, and the upper side of the pulley 4 is installed. At the outer side of the dehydration shaft (2b) is located in the clutch spring (5a) and to operate the clutch lever (5b) for coupling or separating the dehydration shaft (2b) to the pulley (4) to the pulley (4). In the dehydration shaft 2b, a planetary gear portion 2c for switching the rotational force of a motor (not shown) received through the pulley 4 to a speed suitable for washing or dehydration is integrally installed with the dehydration shaft 2b. A brake band 9a is provided on the outer circumferential surface of the fisherman 2c, and a brake lever 9b is provided on one side of the brake band 9a. The one-way spring 6 for suppressing idle rotation of the washing tank 1b is installed at the upper portion of the planetary gear part 2c, and the fixed end 8 for supporting it is the outer housing 3 of the one-way spring 6. It is installed in.

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

First, when washing, the brake band 9a is in a braking state, the clutch spring 5a is in an unlocked state, and the washing shaft 2a and the dehydration shaft 2b are separated from each other, and a motor (not shown) is operated. The washing operation is performed by rotating the stirrer 1c forward and backward through (2a). The washing tank 1b is to be rotated by the reverse rotation of the laundry and water flow, but the one-way spring 6 and the brake band 9a cooperate to prevent this. 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 up, so that the washing shaft 2a and the dehydration shaft 2b are It is rotated integrally to perform dehydration stroke.

On the other hand, the brake lever 9b and the clutch lever 5b, which are pulled out during dehydration stop or power failure, are released, and the dehydration shaft 2b is suddenly braked by the brake band 9a which has lost the rotational force and at the same time obtains the braking force.

However, the conventional band brake has a difference in braking force according to the direction of the band, so in order to prevent idling of the dehydrating tank, a component for reinforcing the direction in which the braking force is weak, that is, one-way one-way spring 6, must be additionally installed. When the one-way spring is restrained at idle, stress concentration occurs at the fixed end, which may cause damage. In addition, when the band brake is used, there is a problem that the brake band is in contact with the outer circumferential surface of the oil fuel box when dehydration occurs.

On the other hand, there is a roller clutch (not shown) that plays a role as a one-way spring (6), when using it adds expensive parts, and installs a separate device so that the roller clutch is not misaligned and overloading If it is acted on, the roller clutch will be damaged and cause malfunction or noise.

The present invention is to solve the above problems, an object of the present invention is to provide a power transmission device of a power washer having a function of performing a dehydration stop and a function of suppressing idle running of the washing tank.

The power transmission device of the washing machine according to the present invention for achieving the above object, a washing tank into which the laundry is put, a stirrer for washing the laundry while rotating inside the washing tank, a motor for rotating the washing tank and the stirrer, the motor A hollow dewatering shaft for transmitting the rotational force of the washing tank, the washing shaft is provided inside the dewatering shaft to transfer the rotational force of the motor to the stirrer, the brake shaft integrally provided with the dehydrating shaft and detachable to the brake drum A brake plate configured to brake the dehydration shaft in cooperation with the brake drum to suppress idling of the washing tank and to brake the washing tank when dehydration stops, a spring for elastically supporting the brake plate to closely contact the brake drum, By reciprocating with the brake drum It is characterized by including a lever 51 for adjusting the attachment and detachment of the brake plate.

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

Washing machine employing the present invention is as shown in FIG.

The main body 10 is provided with a water tank (11) is installed in the water tank 11 to the wash water therein, the laundry is put into the inside of the water tank (11), the washing process is carried out, and after the completion of washing to rotate the high speed to dehydrate the laundry The washing tank 12 is installed and the inside of the washing tank 12 is provided with a stirrer 13 for washing the laundry while the forward and reverse rotation. A motor 14 installed below the water tank 11 to rotate the stirrer 13 and the washing tank 12 is provided, and a first pulley 15 is installed below the motor 14, and the first pulley ( The second pulley 21 facing the 15 is installed at the lower portion thereof, receives the rotational force of the motor 14 through the belt 17, and shifts the speed to a speed suitable for washing or dehydration so that the stirrer 13 or the stirrer 13 ) And a power transmission device 20 for selectively rotating the washing tank 12 are provided on the side of the motor 14.

The power transmission device according to the present invention will be described in detail with reference to FIGS. 3 and 6. 3 and 6 are half sectional views of washing and dehydration of the power transmission device employed in the present invention. As shown in the drawing, the lower end thereof extends to the upper side of the second pulley 21, and the upper end thereof is A hollow dewatering shaft 23 is installed to penetrate the water tank 11 and coupled to the washing tank 12, and upper and lower ends of the hollow dewatering shaft 23 are disposed inside the dewatering shaft 23, respectively, of the stirrer 13 and the second pulley 21. The laundry shaft 22 coupled to the is installed. The upper shaft dewatering shaft 23 of the second pulley 21 is wound or unwound to provide a clutch spring 26a for connecting or separating the dewatering shaft 23 to the second pulley 21.

A boss 28 is installed inside the clutch spring 26a, and a clutch lever 26b is installed outside the clutch spring 26a to manipulate the state of the clutch spring 26a.

The housing 27 is installed between the clutch spring 26a and the water tank 11, and bearings 25 are press-fitted to support the dewatering side 23 on the upper and lower sides of the housing 27. In the dehydration shaft 23 located inside the), a normal planetary gear 24 is integrally formed with the dehydration shaft 23 to shift the rotational speed of the washing shaft 22 to a speed suitable for the washing stroke. In addition, the planetary gear portion 24 and the dehydration shaft 23 are press-fitted with a brake drum 31 having a lower side bent downward so as to correspond to them, and a brake plate 33 capable of raising and lowering below the brake drum 31. The brake drum 31 and the brake plate 33 are installed so that the shoes 32 and 32 'are respectively opposed to each other to perform a braking action. At this time, the outer end of the brake plate 33 is bent downward to move up and down along the housing 27. As shown in FIG. 5, the brake plate 33 moves up and down in the housing 27 corresponding thereto. The guide 34 is to be installed only.

The elevating member 40 is installed below the brake plate 33. The elevating member 40 is bent such that the upper shaft is bent so as to correspond to the brake plate 33, and the lower part is bent in the same manner as the upper side. It is installed in close contact with the deshrink 23. A support part 41 is integrally formed at the end of the bent upper shaft portion of the lifting and lowering member 40 so as to contact the brake plate 33, and a spring (between the lifting and lowering member 40 and the brake plate 33). 35 is installed, and a spring 35 'is also installed between the lift and navigator member 40 and the housing 27 to support the lift member 40 upward to support the brake plate 33 to the brake drum 31. It is a close contact.

On the other hand, when the lower end of the brake drum 31 and washing, that is, the lifting, lowering member 40 corresponding to the brake drum 31 at the time of moving the upper shaft of the lower member 40, the brake drum 31 as shown in FIG. A plurality of grooves 44 into which the lower end of the bottom is inserted are formed, and the brake drum 31 inserted into the grooves 44 has protrusions 36 formed thereon, so that only the lifting and lowering movements are fixed. , By the lowering member 40 is to suppress the idle rotation of the brake drum 31 during washing.

On the other hand, a brake lever 51 for lowering the brake plate 33 is installed at the inner side of the housing 27 to release the braking of the planetary gear part 24 during dehydration. The lever 51 is fixed to the fixing pin 52. It is fixed to the housing 27, the upper end of the moving pin 53 passes through the housing 27 to connect the brake plate 33 and the lever 51.

At this time, the housing 27 corresponding to the moving pin 53 is formed with a circular guide hole 54 for guiding the movement of the moving pin 53 during the rotation of the lever 51 to raise and lower the brake plate 33. Of course it is.

On the other hand, a container 61 is formed at one side of the concave portion of the lifting and lowering member 40, which is bent up and down, close to the lifting and lowering member 40 to form a space in which the fluid is stored. In addition, the lifting member 40 is integrally formed with a piston 42 which bisects the inside of the container 61, and the piston 42 is formed with a fluid movement hole 43 through which fluid can move. At this time, the container 61 is to be fixed to the housing 27, the fixing method is that the left end of the rotation pin 52 for fixing the lever 51 to penetrate the housing 27 to secure the container 61. .

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

First, when washing, the brake plate 33 is in contact with the brake drum 31, and the lifting and lowering member 40 and one side of the brake drum 31 are also coupled to each other. When power is applied to the motor 14 in this state, the rotational force of the motor 14 is transmitted to the stirrer 13 through the washing shaft 22 to perform the washing stroke while performing forward and reverse rotation, in which the rotation of the stirrer 13 is performed. A tendency to rotate along the washing tank 12 also occurs due to the water flow generated by the water and the laundry rotating along the agitator 13, which is press-installed in the dehydration shaft 23 integrally formed with the washing tank 12. ) And the rising and lowering members 40 fixed to the housing 27 are coupled to the serration to suppress it.

On the other hand, during dehydration, when the lever 51 is pulled, the upper side of the lever 51 rotates around the fixing pin 52, and the brake plate 33 coupled to the upper side of the lever 51 by the moving pin 53. The lowering force of the spring 35 'is lowered to overcome the elastic force of the spring 32', so that the shoes 32 and 32 'are separated, and one side of the brake drum 31 and the lifting and lowering member 40 are also separated. The braking state of the planetary gear unit 24 is released, and the clutch lever 26b is also pulled like the brake lever 51, so that the clutch spring 26a is released and the boss 28 coupled to the washing shaft 22 is combined with the boss 28. By decoupling the dehydration shaft 23, the washing tank 12 rotates at high speed to dehydrate the laundry.

On the other hand, during the washing stop or power failure, the state in which the lever 51 is pulled is released, and the brake plate 33 returns to its original state by the elastic force of the spring 35 to brake the washing tank 12. At this time, since the fluid filled in the container 61 moves downward through the narrow fluid movement hole 43 formed in the piston 42, the lifting and lowering of the piston 42 is delayed until the dehydration shaft 23 completely stops. Thus, the coupling of the brake drum 31 and the lifting and lowering member 40 is made after the dehydration shaft 23 completely stops.

As described in detail above, the power transmission device of the washing machine according to the present invention has a high cost such as a one-way roller clutch by providing a brake mechanism having a brake function to stop dehydration and a function of inhibiting forward and reverse idling of the washing and dehydrating tank during washing. The cost of manufacturing is lowered because there is no need for parts and band brakes. The problem is solved.

Claims (7)

The washing tank 12 into which the laundry is put, the stirrer 13 provided for washing the laundry while rotating inside the washing tank, the motor 14 for rotating the washing tank and the stirrer, and transmitting the rotational force of the motor to the washing tank. A hollow dewatering shaft 23, a washing shaft 22 provided inside the dewatering shaft to transfer the rotational force of the motor to the stirrer, a brake drum 31 integrally provided with the dewatering shaft, and detachable to the brake drum A brake plate 33 for braking the laundry tank when the dehydration shaft is braked by cooperating with the brake drum, and springs for elastically supporting the brake plate to be in close contact with the brake drum. 35 ', a lever 5 for adjusting the detachment of the brake drum and the brake plate by reciprocating the brake plate. A power transmission device for a washing machine having 1). The power transmission apparatus of claim 1, wherein the brake drum is provided with a first shoe, and the brake plate corresponding to the first shoe is provided with a second shoe. According to claim 1 or 2, wherein the housing 27 is provided on the outer periphery of the dehydration shaft, the lever is installed so as to be rotatable on the side of the housing with a fixing pin 52, the upper end of the lever A moving pin 53 connecting the lever and the brake plate is installed through the housing, and a moving hole 54 for guiding the movement of the moving pin is formed in the housing corresponding to the blade moving pin to reciprocate the lever. The power transmission device of the washing machine characterized in that the brake plate by the movement to move up, down. According to claim 3, Under the brake plate is formed a support portion 41 in contact with the brake plate on the upper side thereof is provided with the lifting and lowering member 40, which is raised and lowered along the brake plate, , The spring is installed on the lower side of the lowering member, the power transmission device of the washing machine, characterized in that the elastic support for the lifting member, the lowering member to the brake plate side. The container 61 of claim 4, wherein one side of the lifting and lowering member is provided in close contact with the lifting and lowering member so as to form a space for storing fluid therein. The member is provided with a fluid movement hole 43 to move the fluid on one side thereof is integrally provided with a piston 42 which bisects the inside of the container to delay the lifting or lowering of the lifting and lowering members. Power train of the washing machine. The power transmission device of claim 5, wherein the fixing pin extends into the housing to fix the container. According to claim 5, wherein the housing corresponding to the brake plate and the container corresponding to the separating portion is provided with guides 34 and 34 ', respectively, so as to lift and lower the brake plate and the lifting and lowering member. It is a power unit of the washing machine characterized in that.