KR20220013242A - driving apparatus for washing machine - Google Patents

Abstract

A driving device for a washing machine according to the present invention includes: a clutch housing installed on a lower surface of a water tub of the washing machine; an upper dehydrating shaft rotatably installed in the clutch housing and coupled to a washing tub installed inside the water tub; a drum installed under the upper dehydrating shaft; a lower dehydrating shaft installed in the lower portion of the drum and supported by the clutch housing; an upper washing shaft whose top end portion is coupled to a pulsate inside the washing tub through the upper dehydrating shaft; a lower washing shaft connected to the upper washing shaft by a planetary gear unit installed inside the drum through the lower dehydrating shaft; a brake unit installed in the clutch housing and including a second brake lever for controlling rotation of the drum; a movable clutch member connected to the lower dehydrating shaft by spline coupling and installed to be slidable; a first fixed clutch member installed on the lower washing shaft; and a clutch unit engaging or separating the movable clutch member by moving the movable clutch member along the lower dehydrating shaft when the second brake lever is operated. According to the present invention, the amount of slip caused by a reversal of the washing tub can be reduced by increasing the coupling force between the lower washing shaft and the dehydrating shafts.

Description

Driving apparatus for washing machine

The present invention relates to a driving device for a washing machine, and more particularly, to a driving device for a washing machine having an improved clutch unit for rotating a washing tub.

In general, a washing machine removes contaminants from laundry by using the emulsification action of detergent and friction and impact of the water flow due to the rotation of washing blades. .

These washing machines are divided into a pulsator washing machine and a drum washing machine according to the washing method. Among them, the pulsator washing machine forms a water flow by rotating only the washing blades while the washing tub is stopped during the washing and rinsing cycles, and the dehydration cycle In this case, the washing blades and the washing tub are rotated together so that the laundry contained in the washing tub is dehydrated by centrifugal force.

To this end, a typical washing machine includes a washing shaft that rotates the washing blades, a spin-dry shaft that rotates the washing tub, a clutch device that selectively transmits the driving force of a motor to the washing shaft and the spin-dry shaft according to a washing mode, and A brake device for fixing the washing tub is installed.

Korean Patent Registration No. 10-0593636 discloses a clutch device. The disclosed clutch device operates by a clutch motor so that the driving force of the motor is selectively transmitted to the washing shaft and/or the spin-drying shaft, and the brake device operates by the brake motor so that the brake pad fixes the brake drum to wash the washing machine. Make sure that the washing tub remains fixed during administration.

Korean Patent No. 10-0315378 discloses a clutch device for a fully automatic washing machine, Korean Patent No. 10-0176750 discloses a clutch device for a fully automatic washing machine, and Korean Patent No. 10-0688199 discloses a driving device for a washing machine has been posted

The posted driving device of the washing machine includes: a driving shaft to which a rotational force is input; a satellite gear device in which the drive shaft forms a sun gear and a ring gear is connected to the washing tub; a main clutch mechanism mounted on the drive shaft so as to move up and down and connected to the carrier of the satellite gear device, separated from the drive shaft when moving upward, and fixing the carrier of the satellite gear device; and a one-way clutch mechanism provided in the main clutch mechanism.

Korean Patent Registration No. 10-0651079 discloses a clutch of a fully automatic washing machine.

The posted clutch is provided with a first one-way rotation means for allowing only one-way rotation of the wash shaft with respect to the spin-drying shaft between the washing shaft and the spin-drying shaft, and the spin-drying shaft only allows rotation in the opposite direction to the first one-way rotation means for the spin-drying shaft and a second one-way rotation means for rotatably supporting the dehydration shaft is provided.

The clutch of the conventional fully automatic washing machine has a relatively expensive one-way rotation means, and the power transmission structure of the washing machine is relatively complicated.

Korean Patent Registration No. 10-0629742 discloses a fully automatic washing machine. Korean Patent No. 10-0349707 discloses a power transmission device for a washing machine, and Korean Patent No. 10-0247358 discloses a power transmission device for washing machine.

Since a band brake and a one-way clutch bearing are used to fix the conventional dehydrator configured as described above, there is a problem in that the production cost increases, and there is a problem in that the dehydrator cannot be completely held by the band brake. This causes the dehydration drum to rotate under the influence of water flow, thereby reducing washing power and causing noise.

Republic of Korea Patent Registration No. 10-0593636 Republic of Korea Patent Registration No. 10-0315378 Republic of Korea Patent Registration No. 10-0176750 Republic of Korea Patent Registration No. 10-0688199 Republic of Korea Patent Registration No. 10-0349707

The present invention is to solve the above problems, and to increase the coupling force when selectively connecting the power of the lower washing shaft connected to the driving source and the dehydrating shaft to rotate the washing tub during washing or dehydration, the amount of slip caused by the reversal of the washing tub is reduced. It is an object of the present invention to provide a driving device for a washing machine capable of reducing other impacts and improving washing efficiency since the washing tub can be stopped in multiple stages when the washing tub is stopped.

A driving device for a washing machine of the present invention for solving the above technical problem includes: a clutch housing installed on the lower surface of a washing machine tub; A drum installed under the upper de-shrinkage, a lower de-shrinkage installed under the drum and supported by the clutch housing, and an upper washing shaft that passes through the upper de-shrink and is coupled to pulsate whose upper end is located inside the washing tub and a lower washing shaft passing through the lower de-shrinkage and connected to the upper washing shaft by a planetary gear unit installed inside the drum,

a brake unit installed in the clutch housing and having a second brake lever for controlling the rotation of the drum;

A movable clutch member spline-coupled with the lower de-shrinkage and slidably installed, a first fixed clutch member installed on the lower washing shaft, and the second brake lever are moved along the lower de-shrinkage when the movable clutch member is operated It is characterized in that it is provided with a clutch unit for coupling and separating.

In the present invention, first teeth for coupling and second teeth coupled with the first teeth are formed on mutually opposite surfaces of the movable clutch member and the first fixed clutch member.

The brake unit is rotatably installed on a support shaft installed in the clutch housing, one end is fixed to the clutch housing at one end, and the first brake lever is fixed to the other side of a brake band that is in contact with the drum to control the rotation of the drum A lever guide inclined surface is formed at the end of the second brake lever,

The clutch unit has a lever hingedly connected to the clamp housing, and one side of the lever is formed with a fork surrounding the movable clutch member so that the movable clutch member moves along the lower dehydration, and the other side is in contact with the lever guide inclined surface. A second spring for elastically biasing the contact portion to be in close contact with the lever guide inclined surface is installed.

Inclined surfaces are installed on both sides of the contact part to be in contact with the guide lever inclined surface so that the contact part can be moved to the lever guide inclined surface when the second brake lever is operated.

A second fixed clutch member is installed on a lower surface of the clutch housing corresponding to the upper surface of the movable clutch member, and first and second auxiliary teeth are formed on mutually opposite surfaces of the movable clutch member and the first fixed clutch member, respectively.

The driving device for a washing machine of the present invention improves washing efficiency by increasing the coupling force when selectively connecting the power of the lower washing shaft and the spin-drying shaft connected to the driving source to rotate the washing tub during washing or spin-drying, so that the washing tub can be rotated accurately. can In particular, it is possible to suppress the amount of slip caused by the reversal of the washing tub during spin-drying, and there is no need to install a door lock device in the washing machine for safety in the sudden stop mode of the washing tub.

1 is a cross-sectional view schematically showing a washing machine to which a driving device according to the present invention is applied;
2 is a perspective view of a driving device for a washing machine according to the present invention;
3 is a cross-sectional view of a driving device for a washing machine according to the present invention;
4 is a side view showing an operating state of the driving device for a washing machine according to the present invention;
5 is a side view showing a state in which the washing tub is fixed by the drum in the washing mode and the washing shaft connected to the pellet is rotated;
6 is a view showing a driving device for a washing machine according to the present invention, and is a bottom view showing the lower surface of the movable clutch member of the clamp unit to be exposed during washing or sudden braking, showing the position of the lever.
7 and 8 are side views showing a state in which the clutch unit is operated in the dehydration mode after washing;
9 is a bottom view showing the lower surface of the movable clutch member of the clamp unit of the driving device for a washing machine according to the present invention, and shows the position of the lever.
10 and 11 are side views of a driving device for reducing the number of revolutions of the washing tub for sudden braking of the washing tub;
12 is a bottom view showing the lower surface of the movable clutch member of the clamp unit of the driving device for washing machine according to the present invention to be exposed, and shows the position of the lever in the first sudden braking mode.
13 is a perspective view illustrating a position of a lever and a clutch unit during sudden braking of the driving device for a washing machine according to the present invention;
14 is a side view showing a state in which the movable clutch member and the second clutch member are coupled to each other during sudden braking shown in FIG. 13;

An embodiment of the driving device of the washing machine according to the present invention is shown in FIGS. 1 to 5 as being capable of selectively driving the washing tub and the pulsator in the process of washing by the washing machine.

Referring to the drawings, in the washing machine 10 according to the present invention, a water tank 12 is installed inside the washing machine body 11 , and a washing tank 13 is installed inside the water tank 12 . And a driving device 50 is installed on the lower side of the water tank 12 to selectively rotate the washing tank 13 installed in the water tank 12 and the pulsator 14 installed therein.

The driving device 50 of the washing machine includes a clutch housing 51 installed on the lower surface of the water tank 11, and a drum 52 is rotatably located inside the clutch housing 51, and the drum ( An upper dewatering shaft 54 connected to the drum 52 is rotatably installed in the clutch housing 51 on the upper side of 52), and the lower side of the drum 52 is coaxially with the upper dewatering shaft 54. A dewatering shaft (55) is rotatably installed in the clutch housing (51). Accordingly, the drum 52 is rotatably supported inside the clutch housing 51 by being supported by upper and lower de-drain shafts 54 and 55 rotatably supported by the clutch housing 51 .

In addition, an upper washing shaft 56 passing therethrough is rotatably installed in the upper de-shrinking shaft 54 , and the upper end side of the upper washing shaft 56 is a pulsator 14 located on the inner lower side of the washing tub 13 . ) to rotate it forward and reverse. The lower end of the upper washing shaft 56 is connected to the lower washing shaft 57 which is rotatably installed while passing through the lower dewatering shaft 55 by the planetary gear unit 100 mounted inside the drum 52. . Accordingly, the power transmitted through the lower washing shaft 57 is decelerated or accelerated and transmitted to the upper washing shaft 56 .

And the clutch housing 51 is provided with a brake unit 60 for intermittent rotation of the drum 52, that is, to rotate or stop the washing tub 13 during washing.

The brake unit 60 has a first brake lever 62 rotatably installed on a hinge shaft 61 installed on the clutch housing 51, and a clutch housing at the end of the first brake lever 62 on the drum side. One side is fixed to the drum 51 and the other end of the brake band 63 is supported so as to be in close contact with and separated from the drum 52 according to the operation of the drum 52 and the first brake lever. And the first brake lever 62 has a brake band 63 that is in close contact with the drum 52 by a torsion spring 64 that is an elastic member installed on the hinge shaft 61 is in close contact with the drum 52, so that the drum ( The first brake lever 62 is elastically biased in the direction of fixing the rotation of 52).

A lever support shaft 65 is installed on the first brake lever 62 , and a second brake lever 66 is installed on the lever support shaft 65 , the lever support shaft of the second brake lever 66 . At 65, a support spring 67 for elastically biasing the second brake lever 66 in a direction in which the brake band 63 is in close contact with the drum 52 is installed. Here, the end portion 66a of the second brake lever 66 in the drum-side direction is supported by the hinge shaft 61, and a lever guide inclined surface 68 is formed at the other end of the second brake lever 66. .

The lever guide inclined surface 68 is moved in a state in which it is in close contact with the end of the lever, which will be described later, when the second brake lever 62 is operated, so that the power of the lower washing shaft 57 and the lower dewatering shaft 55 is short-circuited. is formed to be inclined to

Meanwhile, the second brake lever 66 may be operated by the drain motor according to the driving mode of the washing machine, but is not limited thereto, and a separate actuator may be further provided.

And, the lower end of the lower washing shaft 57 is connected to a power source. Although not shown in the drawings, a motor may be directly connected, and a pulley rotated by the motor and a belt serving as a power transmission member may be installed. However, the present invention is not limited thereto, and any structure capable of controlling the forward and reverse rotation and rotation speed of the lower washing shaft according to the washing mode is possible.

The lower de-watering shaft 55 and the lower washing shaft 57 are interlocked with the operation of the second brake lever 66 so that the rotational force of the lower washing shaft 57 can be transmitted to the lower spin-drying side 55. A clutch unit 70 is provided.

The clutch unit 70 has splines 71 formed on the outer peripheral surface of the lower dewatering shaft 55, and is coupled to the splines 71 formed on the lower dewatering side 55 to be installed so as to be able to move forward and backward in the longitudinal direction. A first movable clutch member (72) and a first installed on the lower washing shaft (57) or on a pulley installed on the lower washing shaft (57) to be coupled and separated to transmit power to the movable clutch member (72) A fixed clutch member (75) is provided.

First teeth 73 and second teeth 76 which are engaged with each other are formed on mutually opposite surfaces of the movable clutch member 72 and the first fixed clutch member 75 . The first teeth 73 are formed radially from the center of the movable clutch member 72, and the shape of the first teeth 73 is the first base tooth portion 73a and the upper portion of the first base tooth portion 73a. It is provided with a first coupling guide portion (73b) for inducing coupling with the second tooth (76). The second teeth 76 have substantially the same structure as those described above. Accordingly, a first coupling portion 74 having the same shape as that of the second tooth 76 is formed between the first teeth 73 , and the first tooth 73 is formed between the second teeth 76 . ) is formed with the second coupling portion 77 having the same shape as the shape of (see Fig. 4).

And on the lower surface of the clutch housing 51, that is, on the lower surface of the clutch housing 51 corresponding to the movable clutch member 72, a second fixed clutch member 78 is installed, and the movable clutch member 72 opposite to this is installed. First and second auxiliary measures 78a and 78b are installed on the upper surface of the and the lower surface of the second fixed clutch member 78 for their coupling.

A first spring for elastically biasing the movable clutch member 72 toward the first fixed clutch member 75 in the lower de-contraction 55 between the second fixed clutch member 78 and the movable clutch member 72 . (79) is established.

And as shown in FIGS. 2 and 4 , a bracket 81 is installed on the lower side of the clutch housing 51 , and the central part of the lever 82 is rotatable by the hinge shaft 83 on the bracket 81 . The lever 82 and the bracket 81 on the outside of the hinge shaft 83, that is, on the side of the second brake lever 66, are provided with a second spring 84, which is an elastic member, of the lever 82. A rotational force is provided to the second brake lever 66 side.

And one end of the lever 82 is formed with a fork portion 85 supporting the outer circumferential surface of the movable clutch member 72 to elevate the movable clutch member 72 . A flange portion 72a is formed on the outer peripheral surface of the movable clutch member 72 to prevent separation of the fork portion 84 when the movable clutch member 72 is separated from the first fixed clutch member 75 . The other end of the lever 82 is in contact with the lever guide inclined surface 68 of the second brake lever 66 . The other end of the lever 82 in contact with the lever guide inclined surface 68, that is, the inclined surface 82b is formed on both sides of the contact portion 82a. The inclined surface 82b is the edge of the lever guide inclined surface 68 and the inclined surface 82b by the operation of the second brake lever 66 in a state where the contact part of the end of the lever 82 is separated from the lever guide inclined surface 68 during the operation process. ) so that the end of the lever 82 can be moved to the upper surface of the lever guide inclined surface 68 .

The operation of the driving device for a washing machine according to the present invention configured as described above will be described as follows.

In the washing machine driving device 10 according to the present invention, the lower washing shaft 57 is directly connected to the motor or receives the rotational force of the motor through a pulley to rotate the pelsate 13 and the drum 52 during the washing operation. is fixed, and the pulsate 14) and the washing tub 12 are rotated at the same time during the dehydration cycle, which will be described in more detail as follows.

First, during the washing cycle, the driving device 10 controls the operation of the drain motor or a separate actuator to apply the brake band 63 whose end is supported by the first brake lever 62 by the second brake lever 66 to the drum. (52) to fix the rotation of the drum (52),

At this time, the contact portion 82a of the end of the lever 82 is the edge of the lever guide inclined surface 68, that is, the upper side of the lever guide inclined surface 68 as shown in FIGS. 5 and 6 (the first fixed clutch member ( 75) It is located at a position separated from the first fixed clutch member 75 and the movable clutch member 72 by moving the lever 82 downward with the hinge shaft 83 as the center of the contact portion 82a. As well as being separated, the movable clutch member 72 and the second fixed clutch member 78 are in a coupled state.

Accordingly, the upper and lower dehydration shafts 54 and 55 coupled to the drum 52 do not rotate, and the washing tub 13 coupled thereto also does not rotate. In this state, the motor or the lower washing shaft 57 receiving the rotational force from the motor rotates forward and backward, and this rotational force is decelerated by the planetary gear unit and transmitted to the upper washing shaft 56 . The rotation of the upper washing shaft 54 is installed therein, and the perlator 14 located inside the washing tub 12 is rotated to perform washing of laundry.

And in order to spin the laundry after washing by the washing machine, as shown in FIGS. 7 to 9 , the second brake lever 66 is operated using a drain motor or an actuator to operate the first brake lever supported by the support spring 67 . By rotating the brake lever 22 , the brake band 63 attached to the outer circumferential surface of the drum 52 is separated from the drum 52 .

At this time, the end of the lever 82, that is, the contact portion 82a is moved along the lever guide inclined surface 68 by the operation of the second brake lever 66, and the edge of the lever guide inclined surface 68 of the inclined surface 82b. is located in

Accordingly, the lever 82 is rotated about the hinge shaft 83 by the second spring 84 to move the fork 85 toward the first fixed clutch member 75, and the movable clutch member 72 supported thereon. ) is moved to the first fixed clutch member 75 side by the first spring 79, the first tooth 73 of the movable clutch member 72 and the second tooth 76 of the first fixed clutch member 75 will be combined with each other. Accordingly, the lower de-shrinkage 55, the lower washing shaft 57, the drum 52, the upper de-shrinkage 54, and the upper washing shaft 56 rotate at the same time, so that the upper washing shaft 56 and the upper dewatering shaft 54 are rotated at the same time. ), as the pulsator 14 and the washing tub 13 rotate together, the washing tub 13 and the pulsator 14 rotate at the same time to dehydrate the laundry.

In addition, the stop mode after the dehydration of laundry is performed may consist of a primary mode of rapid dehydration stop as shown in FIGS. 10 to 11 and a secondary mode of rapid dehydration stop as shown in FIGS. 13 to 14 and 6 .

As described above, in the primary mode of dewatering quick stop, the washing tub 13 and the pulsator 14 rotate at high speed in a state in which the movable clutch member 72 and the fixed clutch member 75 are coupled. First, the number of rotations of the washing tub 13 and the pulsator 14 is reduced to stop it.

In this dehydration supply stop primary mode, first, when the second brake lever 66 is rotated at a predetermined angle by using a drain motor, the contact portion 82a of the lever 82 moves along the rail guide inclined surface 66 along the rail. It moves toward the central part of the guide inclined surface (66).

Accordingly, as the lever 82 is rotated about the hinge shaft 83 , the movable clutch member 72 is separated from the first fixed clutch member 75 so that the drum 52 can freely rotate. At this time, the first The brake lever 52 is rotated by the torsion spring 64 to bring the brake band 63 into close contact with the drum 52 to reduce the rotation of the drum 52 . The reduction in the number of rotations of the drum 52 reduces the rotation of the washing tub 13 connected thereto with the upper dewatering shaft 54 .

That is, when the second brake lever 66 is released by a predetermined distance by the frame motor, the first brake lever 62 is rotated by the torsion spring 64 and the brake band 63 is formed on the outer circumferential surface of the drum 52 . ) is in close contact to lower the speed of the dehydration tank, and the first fixed clutch member 75 and the movable clutch member 72 are separated. It is possible to reduce the impact caused by the sudden stop of the rotating washing tub.

And in the secondary dewatering supply stop mode, as shown in FIGS. 13, 14 and 6, when the second brake lever 66 is pulled by the drain motor after a set time, the first brake lever 62 is It is rotated by the torsion spring 64 to strongly adhere the brake band 63 to the outer peripheral surface of the drum 52 . Accordingly, the washing tub 13 connected to the upper de-shrink 54 is stopped. At this time, the end of the lever 82, that is, the contact portion 82a, is on the edge of the lever guide inclined surface 68, that is, the edge of the relatively high side. is located in

Accordingly, as the lever 82 is rotated by the lever guide inclined surface 68, the movable clutch member 72 is raised and coupled with the second fixed clutch member 78 fixed to the clutch housing 51, thereby rotating the washing tub 13. to complete the spin-drying mode.

The movable clutch member 72 is spline-coupled with the lower de-shrinkage 55 and first and second auxiliary measures 78a formed on the upper surface of the movable clutch member 72 and the lower surface of the second fixed clutch member 78. By engaging (78b), the rotation of the drum (52) is completely fixed. Therefore, the washing tub 13 is completely fixed to rotate in the forward and reverse directions.

As described above, after dehydration is performed, the stop mode of the washing tub 13 includes a primary mode for rapidly decelerating the rotation speed of the washing tub 13 by first attaching the brake band 63 to the drum 52, and After the rotational deceleration of the washing tub 13 is made, the first brake lever 62 is rotated by the rotation of the second brake lever 66 so that the brake band 63 on the outer peripheral surface of the drum 52 is in close contact with the drum 52 . This is achieved by the secondary mode of dehydration supply stop, which completely stops the washing tub 13 as the movable clutch member 72 and the second fixed clutch member 78 of the clutch unit 70 are coupled to each other as well as to stop the rotation.

This can reduce the impact caused by sudden stop of the washing tub 13 rotating at high speed due to dehydration, and fundamentally prevent damage to the driving device, but also maintain the standby mode for washing.

As described above, the driving device for a washing machine according to the present invention can smoothly perform rotation and stop in the washing tub for washing and rotation and braking of the dehydrator for dehydration of laundry, thereby improving washing efficiency. , it is possible to simplify the braking structure of the washing machine because a separate braking device is not required for the door for sudden braking of the washing machine.

Although the present invention has been described with reference to the embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will have to be determined by the technical spirit of the appended claims.

Claims (5)

A clutch housing installed on the lower surface of the washing machine tub, an upper dewatering shaft rotatably installed in the clutch housing and coupled to a washing tub installed inside the water tub, a drum installed under the upper dewatering shaft, and a lower portion of the drum A lower de-shrinkage installed in the clutch housing and supported by the clutch housing; and a lower washing shaft connected to the upper washing shaft by a gear unit;
a brake unit installed in the clutch housing and having a first brake lever for controlling the rotation of the drum;
Manipulation of a movable clutch member spline-coupled with the lower de-shrinkage and slidably installed, a first fixed clutch member installed on the lower washing shaft, and a second brake lever supported by an elastic member on the first brake lever and a clutch unit for selectively delaying coupling and disengaging by moving the movable clutch member along the lower de-shrinking during operation. The method of claim 1,
The driving device for a washing machine, wherein first teeth for coupling and second teeth for coupling with the first teeth are formed on mutually opposite surfaces of the movable clutch member and the first fixed clutch member. 2. The method of claim 1
The brake unit is rotatably installed on a support shaft installed in the clutch housing, and one end is fixed to the clutch housing at one end, and a support spring is fixed to the first brake lever fixed to the other side of a brake band that is in contact with the drum to control the rotation of the drum. A lever guide inclined surface is formed at the end of the second brake lever supported by
The clutch unit has a lever hingedly connected to the clamp housing, and one side of the lever is formed with a fork surrounding the movable clutch member so that the movable clutch member moves along the lower dehydration, and the other side is in contact with the lever guide inclined surface. A driving device for a washing machine, characterized in that a second spring is installed to elastically bias the contact portion to be in close contact with the inclined surface of the lever guide. 4. The method according to claim 2 or 3,
and a first spring for elastically biasing the movable clutch member in a direction to separate the movable clutch member from the second stationary clutch member is installed between the movable clutch member and the second stationary clutch member. 3. The method of claim 2,
A second fixed clutch member is installed on the lower surface of the clutch housing corresponding to the upper surface of the movable clutch member, and first and second auxiliary teeth are formed on mutually opposite surfaces of the movable clutch member and the first fixed clutch member, respectively driving device for washing machine.

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