KR19980037934A - Power Train for Washing Machine - Google Patents

Abstract

The present invention, the hollow dewatering shaft 120 is installed inside the washing shaft 110 coupled to the motor 20 for driving the rotating tub 12 and the rotary blade 13 inside the dewatering shaft 120 Is installed. The fixing member 140 having the inner tooth 141 is fixedly coupled to the lower surface of the water tank 11. The washing shaft 110 is coupled to the rotating member 150 having an outer tooth 151. The dehydration shaft 120 is integrated into the rotary furnace, but the coupling member 130 is installed as a lifting material. The outer tooth 132 is installed on the upper side of the connection member 130, and the inner tooth 131 is installed on the lower surface. The connection member 130 is provided between the fixing member 140 and the rotating member 150. An elevating member 160 which is elevated up and down integrally with the connection member 130 is provided, and a protrusion 161 inserted into the elevating guide hole 171 formed to be inclined is provided on an outer side of the elevating member 160. And the rotating member 180 is installed to rotate the projection 161 to elevate the elevating member 160. Rotating member 180 is a rotary gear 181, the protrusion 161 is coupled to the lifting material on the inner surface and one end is engaged with the rotary gear 181, the other end is a rotary bar 182 coupled to the drain motor 40 ) Is rotatably installed at the starting point with the rotation shaft 183 provided in the middle to rotate the rotation gear 181.

Description

Power Train for 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 configured to increase the accuracy of the operation and to easily transmit the operating force from the outside by configuring each component using a gear.

1 is a view showing an internal configuration of a general power transmission device mounted between a motor and a rotating tub and a rotary blade of a washing machine to switch power, reduce a rotation speed, and perform braking. As shown in the figure, the upper end is coupled to the rotating tub 1b of the washing machine, and the lower end is provided with a dehydration shaft 2a, 2b, 2c extending downward so as to be exposed to the outside of the water tank 1a. . Inside the dehydration shaft (2a) (2b) (2c) is provided with a washing shaft (3a) (3b) for transmitting the rotational force of the motor (9e in Figure 2) to the rotary blade (1c), washing shaft (3a) The upper end of 3b is coupled to the rotary blade 1c and the lower end extends to be exposed to the lower side of the dehydration shaft 2a, 2b and 2c. A pulley 8 is installed at the lower end of the washing shafts 3a and 3b so that the rotational force of the motor (9e in FIG. 2) is transmitted to the washing shafts 3a and 3b through the belt (9f in FIG. 2). At this time, the washing shaft (3a) (3b) is separated up and down and is connected via the planetary gear (4) so that the rotational speed of the motor (9e of Figure 2) is decelerated appropriately for washing.

In addition, the clutch spring 5a and the clutch lever 5c for adjusting the boss 5b are disposed at the lower part of the dehydration shaft 2a, 2b and 2c and the lower part of the washing shaft 3a and 3b opposite thereto. It is installed via the clutch lever 5c to engage or separate the washing shafts 3a, 3b and the dehydrating shafts 2a, 2b, 2c.

And the dehydration shaft (2a) (2b) (2c) is provided with a braking structure for suppressing the idling of the rotary bath during washing and sudden braking when dewatering. The braking structure has a brake band 6a surrounding the dehydration shaft 2b and a brake lever 6b for adjusting the brake band 6a, which cooperates with the clutch lever 5c. At this time, the one-way clutch bearing 7 is installed at the lower dehydration shaft 2c of the brake band 6a to cooperate with the brake band 6a to prevent idle rotation of the rotating tub 1b during washing.

The operation of the conventional power transmission device configured as described above is as follows. First, I will explain when washing. When no external force is applied to the clutch lever 5c and the brake lever 6b, the clutch spring 5a is in a state in which the dehydration shaft 2a, 2b, 2c and the washing shaft 3a, 3b are separated. The brake band 6a is pressed against the dehydration shafts 2a, 2b and 2c to brake the dehydration shafts 2a, 2b and 2c. In this state, the rotational force of the motor (not shown) transmitted to the pulley 8 is transmitted to the lower portion of the washing shafts 3a and 3b, decelerated by the planetary gear 4 installed in the middle, and then transferred to the upper portion to rotate the rotor blade ( Rotate to 1c). The rotary blade 1c rotating the above-described method performs washing stroke while forward and reverse rotation along the rotational direction of the motor 9e. At this time, the rotating tank (1b) is to be rotated by the water flow formed by the rotating blade (ac) and the rotating blade (1c) is rotated forward and backward, which is compressed to the dehydration shaft (2a) (2b) (2c) The brake band 6a and the one-way clutch bearing 7 are restrained.

At the time of dehydration, the brake lever 6b and the clutch lever 5c are simultaneously pulled, whereby the clutch spring 5a couples the dehydration shaft 2a, 2b, 2c and the washing shaft 3a, 3b. The brake lever 6b spaces the brake band 6a away from the dehydration shafts 2a, 2b and 2c. In this state, the rotational force of the motor 9e is simultaneously transmitted to the rotary blades 1c and the rotating tank 1b through the washing shafts 3a and 3b and the dehydrating shafts 2a and 2b and 2c, thereby rotating them at high speed. Let it be. As a result, centrifugal force acts on the laundry inside the rotating tub 1b to centrifuge the water in the laundry.

On the other hand, during sudden braking during dehydration, the force applied to the brake lever 6b is extinguished, whereby the brake band 6a, whose position has been changed, is squeezed by the dehydration shafts 2a, 2b, and 2c. The rotating tank 1b is braked rapidly by braking 2b) and 2c. At this time, the clutch spring 5a interlocks to separate the washing shafts 3a and 3b and the dehydration shafts 2a, 2b and 2c.

As shown in FIG. 2, the clutch lever 5c is connected to the drain motor 8a. That is, an operation line 9c is installed between the drain motor 9a and the drain valve 9b, and the operation line 9c and the drain valve 9b are connected via a link 9d. The free end of the clutch lever 5c is rotatably coupled to the link 9d so that the drain valve 9b and the clutch lever 5c interlock with each other.

As can be seen from the above, the conventional power transmission device has a complicated structure due to the incorporation of planetary gears in order to change the rotational speed due to the difference in the required rotational speed during washing and dewatering administration. This makes it difficult to manufacture and the manufacturing cost is expensive.

In addition, the band-type brake for sudden braking during idling and dehydration of the rotating tub had a problem of friction noise during operation. In particular, the band-type brakes had a strong one-way braking force but a weak braking force in the opposite direction. In order to solve this problem, the assembly process was more difficult and the manufacturing cost was further increased by additionally installing the one-way clutch bearing.

Therefore, the present invention is to solve the above problems, an object of the present invention is to provide a power transmission device for a washing machine that can smoothly switch the power and can effectively suppress idle rotation of the rotating tub during washing.

Another object of the present invention is to provide a power transmission device for a washing machine in which the operating force transmitted from the outside can be accurately and easily transmitted.

1 is a view showing the structure of a power transmission device for a general washing machine.

2 is a view showing the bottom of the conventional water tank.

Figure 3 is a view showing the structure of a washing machine employing a power transmission device according to the present invention.

4 is an exploded perspective view of the power transmission device according to the present invention.

5 and 6 are views showing the internal configuration of the power transmission device according to the present invention,

FIG. 5 illustrates washing and FIG. 6 illustrates dehydration.

Figure 7 is a view of the upper side by cutting the upper portion of the rotating member is installed power transmission apparatus according to the present invention.

8 is a cross-sectional view of the drain valve.

Explanation of symbols on the main parts of the drawings

110: washing shaft 120: dewatering 130: connecting member 131: internal teeth

132: outer tooth 140: fixed member 150: rotating member 160: elevating member

170: elevating guide member 171: elevating guide hole 180: rotating member

181: Revolving Gear 182: Revolving Bar

Power transmission of the washing machine according to the present invention for achieving the above object, the upper end is coupled to the rotating tub of the washing machine, the lower end of the hollow dewatering shaft extending to the lower portion of the water tank of the washing machine, is provided inside the dewatering shaft, the upper Is coupled to the rotary blades of the washing machine, the lower end of the washing shaft coupled to the motor for driving the rotary tank and the rotary blade, the fixing member fixed to the tank, the dehydration shaft and the rotation to the dehydration shaft is integrated, A connecting member coupled to the fixing member or coupled to the laundry shaft according to the lifting position of the material, a lifting member for lifting the connecting member, and a protrusion provided on an outer surface of the lifting member is inserted and lifted according to the rotation direction. An elevating guide member having an elevating guide hole inclined to be inclined so as to rotate the gear, wherein the protrusion of the elevating member is combined with an elevating material. A stage is engaged with the rotation gear and the other end is connected to the drain motor of the washing machine, characterized in that it comprises a rotation bar for rotating the rotation gear.

In addition, a protrusion that provides a power switching force by moving up and down while rotating, the protrusion is free to raise and lower the rotation gear is coupled to one, including a rotation bar is engaged with the rotation gear to rotate the rotation gear. It is a characteristic structure.

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

Figure 3 is a view showing the internal configuration of a washing machine employing a power transmission device according to the present invention. As shown in the figure, the water tank 11 is installed inside the main body case 10. The rotating tank 12 is rotatably installed inside the water tank 11, and the rotary blade 13 is rotatably installed on the inner bottom surface of the rotating tank 12. And the lower surface of the water tank 11 is provided with a motor 20 for driving the rotating tank 12 and the rotary blade 13 in the center of the outer surface, the motor 20 is rotated forward and reverse, the rotation speed is variable and rotates when dewatering A model capable of braking the jaw 12 and the rotary blade 13 is installed. A power transmission device 100 is installed between the motor 20 and these rotating bodies to selectively transmit the rotating force of the motor 20 to the rotary blade 13 or the rotary blade 13 and the rotary tub 12. In the laundry, idle rotation of the rotating tub 12 is suppressed. And one side of the water tank 11 is connected to the drain hose 14 for draining the wash water, the free end of the drain lake 14 extends to the outside of the body case 10, the middle of the drain valve ( 30) is interposed.

Power transmission device 100 for a washing machine according to the present invention, as shown in Figures 4 and 5 and 6, the upper end is coupled to the rotary tub 12 and the lower end is extended to the bottom of the water tank 11 The dehydration shaft 120, the dehydration shaft 120 is installed inside the upper end is coupled to the rotary blade 13 and the lower end is coupled to the washing shaft 110, the dehydration shaft 120 coupled to the motor 20 It is roughly divided into a fixing member 140 for fixing the dehydration shaft 120 in order to suppress the idle rotation of the connecting member 130 and the rotating tub 12 for coupling to or separating from the washing shaft 110.

The dehydration shaft 120 is installed to penetrate the water tank 11 up and down so that both top and bottom ends protrude into the inside and outside of the water tank 11, and the upper end is integrally coupled to the rotating tank 12. At this time, the reinforcement plate 191 is coupled to the portion where the dehydration shaft 120 is installed to reinforce the portion where the dehydration shaft 120 is coupled, and between the reinforcement plate 191 and the dehydration shaft 120 A bearing 192 for rotationally supporting the 120 is interposed. The upper end of the washing shaft 110 is installed in the dehydration shaft 120 is coupled to the rotary blade 13 and the lower end is coupled to the motor 20, the upper is serrated coupled to the rotary blade (13) .

And the lower end of the washing shaft 110 is extended to be exposed to the outside of the dehydration shaft 120, the rotating member 150 is installed to rotate integrally with the washing shaft 110, the reinforcement plate 191 The lower side of the fixing member 140 is fixedly coupled, and the dehydration shaft 120 between them is coupled to the fixing member 140 when ascending and the connecting member 130 coupled to the rotating member 150 when descending dehydration It is installed to rotate integrally with 120. That is, the rotating member 150 is installed to rotate integrally with the washing shaft 110 in a gear shape with the outer tooth 151, the inner tooth 141 is provided on the center of the fixing member 140, the connecting member 130. The outer tooth 132 and the inner tooth 131 are respectively formed on the upper and lower sides of the upper and lower teeth, and are engaged with the fixing member 140 when ascending, and are engaged with the rotating member 150 when descending. Meanwhile, three grooves 121 extending upward and downward are installed on the lower outer surface of the dewatering shaft 120 facing the connecting member 130 at equal intervals, and the grooves are provided on the inner surface of the connecting member 130 facing the connecting member 130. Protruding portion 133 is inserted into the 121 is provided so that the connection member 130 ascends by rotating the dehydration shaft 120 while being integral with the dehydration shaft 120. In this way, the connection member 130 is coupled to the fixing member 140 by raising the dehydration shaft 120 to fix or lower the dehydration shaft 120 and coupled to the rotating member 150 to wash the dehydration shaft 120. Rotate integrally with the shaft (110).

And a structure for elevating the connecting member 130 is provided. That is, the elevating member 160 is installed so as to be integrated with the connecting member 130 and rotate separately. That is, the elevating member 160 provided in a ring shape is installed to be coupled to the connecting member 130 via the bearing 93 so that the elevating member 160 and the connecting member 130 can be raised and lowered integrally but separately from each other. do. At this time, the lower inner surface of the elevating member 160 has a plurality of protruding jaw 162 is formed to support the bearing 93 inserted therein from the lower side, the upper side has a plurality of locking jaws 163 extending upwards The bearing 93 is coupled to the inner side of the elevating member 160 by being formed to support the upper side of the connecting member 130.

On the outer side of the elevating member 160, an elevating guide member 170 for inducing elevating of the elevating member 160 is installed. The lifting guide member 170 has a lifting guide hole 171 which slides by inserting a protrusion 161 formed to protrude outwardly of the lifting member 160 and is slidably extended, and the lifting guide hole 171 is vertically up and down. It is formed to be inclined so that the projection 161 rotates left and right along the inclined surface to elevate the elevating member 160 and the connecting member 130.

And the rotating member 180 for rotating the elevating member 160 to elevate the connecting member 130 is installed, the rotating member 180 as shown in Figures 4 and 5 and 6 and 7, It is operated by a drain valve 30 having a resilient elastic restoring force and a drain motor 40 for opening the drain valve 30. An operation line 41 is installed between the drain valve 30 and the drain motor 40 to connect them, and a link 42 is interposed between the operation line 41 and the drain valve 30. And the rotation member 180 is coupled to this link 42 to interlock with the drain valve 30 so that the external operating force is transmitted to the power transmission device (100).

Referring to the rotation member 180 in detail, the rotation member 180 is disposed on the outer side of the elevating guide member 170 so that the free end of the protrusion 161 penetrating the elevating guide hole 171 is coupled to its inner surface. And the rotating gear 181 having an outer tooth 181a and one end thereof are engaged with the rotating gear 181, and the other end is connected to the operating line 41 to connect the rotating gear 181 by the reciprocating motion of the operating line 41. Rotating bar 182 to rotate. A groove 181b is formed on the inner surface of the rotation gear 181 opposite to the projection 161 so that the projection 161 is inserted and coupled, and the groove 181b extends up and down so that the projection 161 is a rotation gear ( 181 to move up and down along the elevation guide hole 171 while integrally rotating. And the rotation bar 182 is installed so that both ends are rotated by the rotation shaft 183 fixed to the lower surface of the water tank 11, teeth (182a) which is bitten by the outer tooth of the rotation gear 181 at one end thereof. Is provided, the other side is coupled to the operation line 41 for linear reciprocating motion by the drain motor 40 and the drain valve (30). At this time, the other end of the rotation bar 182 is coupled to the link 42 interposed between the operation line 41 and the drain valve 30. That is, the operation line 41 is disposed in the direction perpendicular to the longitudinal direction of the rotation bar 182, the projection 182b is provided at the other end of the rotation bar 182 is provided in the coupling hole (42a) formed in the link 42 By inserting the both ends of the rotation bar 182 in the linear motion of the operation line 41 to rotate to the starting axis to the rotation shaft (183). At this time, the rotation shaft 183 is installed to be biased toward the operation line 41 in order to enlarge the rotation width of the rotation gear (181). The teeth 182a formed at one end of the rotation bar 1812 are extended in an arc shape close to a straight line to sufficiently rotate the rotation gear 181.

The straight reciprocating motion of the operation line will be described in detail with reference to FIGS. 7 and 8. The operation line 41 moves to the left side (Fig. 7) by pulling the drain motor 40 to open the drain valve 30, and when the force of the drain motor 40 is extinguished, the elastic restoring force of the drain valve 30 is retained. It reciprocates by moving to the right by. Referring to the drain valve 30 exhibiting an elastic restoring force, the drain valve 30 is installed at the bending portion of the drain hose 14 and has a bellows 31 for opening and closing the flow path and a spring provided inside the bellows 31. 32 and one end thereof are coupled to the inner surface of the bellows 31 and the other end includes an operating rod 33 is coupled to the link 42. That is, when the bellows 31 is compressed by the drain motor 40 to open the flow path, the spring 32 is also compressed to have elastic restoring force.

The operation of the power train configured as described above will be described together with the operation of the washing machine.

First, I will explain the washing administration. In the laundry administration, the connection member 130 is elevated and engaged with the fixing member 140, and the dehydration shaft 120 is separated from the laundry shaft 110. In this state, the motor 20 rotates the washing shaft 110 forward and backward at a rotation speed suitable for washing. The rotating wing 13 coupled to the forward and backward washing shaft 110 rotates forward and backward to form a water stream to perform a washing stroke. (Figure 4)

We will continue to explain the transition to dehydration administration. When the drain motor 40 operates to pull the operation line 41, the drain valve 30 connected to the operation line 41 is opened, and one side of the rotation bar 182 having the other end coupled to the link 42 is rotated by the rotation shaft ( 183), rotate counterclockwise (Fig. 7). As a result, one end of the rotation bar 182 is rotated clockwise so that the rotation gear 181 meshed with the teeth 182a formed at one end is rotated in the clockwise direction (Fig. 7). As the rotation gear 181 rotates clockwise, the projection 161 rotates in the same direction. As a result, the protrusion 161 is lowered along the inclined surface of the elevating guide hole 171 so that the elevating member 160 and the connecting member 130 which are interlocked with the protrusion 161 at the time of elevating are lowered and disposed below the rotating member 150. Is matched to. That is, the inner tooth of the connecting member 130 is engaged to the outside of the rotating member 150, the connecting member 130 is lowered along the groove 121 formed up and down on the dehydration shaft (120). And the protrusion 161 coupled to the non-elevating rotational gear 181 is elevated along the groove 181b formed up and down on the inner surface of the rotational gear 181. (Figure 4)

Dehydration operation is performed by rotating the motor 20 at a speed suitable for dehydration in the above state. That is, the rotational force of the motor 20 is transmitted to the rotary blade 13 and the rotating tub 12 through the laundry shaft 110 and the dehydration shaft 120 connected thereto so that they rotate at a high speed to generate centrifugal force, which causes water to be washed in the laundry. Centrifuge.

When the washing stroke is completed and applied to the drain motor 40 and the power is cut off, the operation line 41 and the link 42 move to the right side (FIG. 7) by the elastic restoring force of the spring 33 of the drain valve 30. . As a result, the pivoting bar 182, the pivoting gear 181, and the elevating member 160 and the connecting gear 130 are rotated or lifted in the opposite direction to the transition to the dehydration stroke so that the connecting gear 130 is fixed to the fixed member 150. Make sure they are engaged.

As described above in detail, the power transmission device for a washing machine according to the present invention suppresses idling of the rotating tub by washing by engaging the gears, so that idling can be reliably prevented and friction noise can be reduced when idling is suppressed. There is an advantage. In addition, since the structure for preventing idling of the rotating tank and switching the transmission path of the motor rotational force is made by three gears, the manufacturing cost can be reduced.

In addition, since the external operation force for switching of the power transmission device is supplied using the gear coupling, the operation force is accurately and smoothly transmitted. And the aspect and assembly of a component can be improved.

Claims (7)

The upper end is coupled to the rotary tub 12 of the washing machine, the lower end of the hollow dewatering shaft 120 extending to the lower portion of the water tank 11 of the washing machine, It is provided in the dehydration shaft 120, the upper end is coupled to the rotary blade 13 of the washing machine, the lower end is coupled to the motor 20 for driving the rotary tub 12 and the rotary blade 13. Laundry shaft (110), Fixing member 140 fixed to the water tank 11, The dehydration shaft 120 and the rotation to the dehydration shaft 120 is integrally provided as a lifting material is coupled to the fixing member 140 or coupled to the laundry shaft 110 according to the lifting position 130 ), Lifting member 160 for lifting the connection member 130, Lifting guide member 170 having a lifting guide hole 171 is provided to be inclined to be elevated in accordance with the rotation direction is inserted into the projection 161 provided on the outer surface of the lifting member 160, A rotation gear 181 to which the protrusion 161 of the elevating member 160 is coupled as an elevating material; One end thereof is engaged with the rotating gear 181 and the other end is connected to the drain motor 40 of the washing machine, the power transmission device for a washing machine, characterized in that it comprises a rotating bar 182 for rotating the rotating gear 181. . The method of claim 1, The rotating gear 181 opposite to the protrusion 161 is provided with a groove 181b extending up and down, and the protrusion 161 is inserted and coupled so that the rotation is integrated, but the lifting and lowering is free. Power train. The method according to claim 1 or 2, The rotation bar 182 is provided so that both ends are rotated on the basis of the rotation shaft 183 provided in the middle, the other end of the operation line 41 for linear movement by the drain motor 40 and the drain valve 30 of the washing machine. Is coupled to the power transmission device for a washing machine, characterized in that provided to rotate along the reciprocating motion of the operation line (41). The method of claim 3, A link 42 is coupled to the operation line 41, and the other end of the rotation bar 182 is rotatably coupled to the link 42. The power transmission device for a washing machine. The method of claim 3, The rotating gear 181 is provided with an outer tooth 181a, and one end of the rotating bar 182 is provided with teeth 182a engaged with the outer tooth 181a by a predetermined width. Device. Projection (161), which provides power switching power by lifting while rotating; Rotating gear 181 is coupled to the protrusion 161 is free to lift but the rotation is integral, And a rotation bar (182) engaged with the rotation gear (181) and provided to rotate the rotation gear (181). The method of claim 6, The pivoting bar 182 is provided so that both ends rotate in opposite directions starting from the pivoting shaft 183 provided in the middle, and teeth 182a meshed with the outer tooth 181a of the pivoting gear 181 at one end thereof. Power transmission device for a washing machine, characterized in that provided.