KR100213137B1 - Power transfer apparatus of a washing machine - Google Patents

Abstract

The present invention is characterized in that a hollow shaft 120 is provided and a washing shaft 110 coupled to a motor 20 for driving the rotary tub 12 and the rotary blades 13 is provided inside the dew condensation shaft 120 Respectively. A fixing member 140 having an internal tooth 141 is fixedly coupled to a lower surface of the water tub 11. A rotary member 150 having an external teeth 151 is coupled to the washing shaft 110. The dehydrating shafts 120 are formed integrally with the rotary shaft, and the connecting members 130 are coupled with the elevating and contracting members. The external member 132 is provided on the upper side of the connecting member 130 and the internal teeth 131 are provided on the lower surface thereof. The connecting member 130 is provided between the fixing member 140 and the rotary member 150. The elevating member 160 is provided integrally with the connecting member 130. The elevating member 160 has a protrusion 161 inserted into the elevating guide hole 171 formed at an outer side of the elevating member 160. A tiltable member 180 is provided to rotate the projection 161 to move the lifting member 160 up and down. The pivoting member 180 has a pivoting gear 181 on its inner surface on which the projection 161 is lifted and lowered and a pivoting bar 182 coupled to the pivoting gear 181 at one end and coupled to the drain motor 40 Is rotatably provided on the basis of a pivot shaft 183 provided in the middle, so that the pivotal gear 181 is rotated.

Description

Power transmission for washing machines

BACKGROUND OF THE INVENTION 1. Field of the Invention 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, in which each component is constituted by gears to improve operation accuracy and to easily transmit operating force from the outside.

1 is a view showing the internal structure of a general power transmission device mounted between a motor of a washing machine and a rotary tumbler and a rotary blade for switching power, decelerating the rotation speed and performing braking. As shown in the drawing, the upper end thereof is coupled to the rotary tub 1b of the washing machine, and the lower end thereof is hollowly provided with dehydrating shafts 2a, 2b and 2c extending downward so as to be exposed to the outside of the water tub 1a . The washing shafts 3a and 3b for transmitting the rotational force of the motor 9e to the rotary blades 1c are provided in the damping shafts 2a and 2b and 2c. The upper end of the damping shafts 3b is coupled to the rotary vane 1c and the lower ends are extended to expose below the dampening shafts 2a, 2b and 2c. A pulley 8 is provided at the lower end of the washing shafts 3a and 3b so that the rotational force of the motor 9e is transmitted to the washing shafts 3a and 3b through the belt 9f. At this time, the washing shafts 3a and 3b are separated from each other by the upper and lower parts and are connected to each other via the planetary gears 4, so that the rotational speed of the motor (9e in FIG.

A clutch spring 5a and a clutch lever 5c for adjusting the clutch springs 5a and 5b are fixed to a lower portion of the damping shafts 2a and 2b and 2c and a lower portion of the washing shafts 3a and 3b opposite to the damping shafts 2a and 2b, So that the washing shafts 3a and 3b and the dehydrating shafts 2a and 2b and 2c are engaged or separated by operating the clutch lever 5c.

The damping shafts 2a, 2b, and 2c are provided with a braking structure for suppressing idling of the rotating tub during washing and for sudden braking upon dewatering. The braking structure has a brake band 6a surrounding the dewaxing shafts 2b and a brake lever 6b for adjusting the brake band 6a so that the brake lever 6b cooperates with the clutch lever 5c. At this time, a one-way clutch bearing 7 is installed on the lower dehydrating shrinkage 2c of the brake band 6a to cooperate with the brake band 6a to prevent idling of the rotating tank 1b during washing.

The operation of the conventional power transmission apparatus constructed as described above is as follows. First, I will explain washing time. When no external force acts on the clutch lever 5c and the brake lever 6b, the clutch spring 5a is in a state in which the dewaxing shafts 2a, 2b, 2c and the washing shafts 3a, 3b are separated, The brake band 6a is pressed against the damping shafts 2a, 2b and 2c to brake the damping shafts 2a and 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 shaft 3a or 3b, is decelerated by the planetary gear 4 disposed in the middle, 1c. In the above-described method, the rotating rotary blade 1c performs a washing cycle while rotating in the forward and reverse directions along the rotating direction of the motor 9e. At this time, the rotating tub 1b is intended to rotate by the water flow formed by the rotating blades ac rotating in the normal and reverse directions and the laundry rotating along the rotating blades 1c. This causes the rotating shafts 2a, 2b, Way clutch bearing 7 and the brake band 6a.

The brake lever 5b and the clutch lever 5c are simultaneously pulled at the time of dewatering so that the clutch spring 5a couples the dewaxing shafts 2a, 2b and 2c and the washing shafts 3a and 3b The brake lever 6b separates the brake band 6a from the damping shafts 2a, 2b and 2c. In this state, the rotational force of the motor 9e is simultaneously transmitted to the rotary vane 1c and the rotary vane 1b through the washing shafts 3a and 3b and the damping shafts 2a and 2b and 2c, . As a result, centrifugal force is applied to the laundry in the inside of the rotating tub 1b to centrifuge the laundry in the laundry.

On the other hand, during the dewatering process, the pulling force exerted on the brake lever 6b is extinguished so that the brake band 6a whose position has been changed is pressed against the dewable shafts 2a, 2b, 2b) 2c so that the rotary tub 1b is quickly braked. At this time, the clutch spring 5a is interlocked to separate the washing shafts 3a, 3b from the dewatering shafts 2a, 2b, 2c.

Then, as shown in Fig. 2, the clutch lever 5c is connected to the drain motor 8a. That is, an operating line 9c is provided between the drain motor 9a and the drain valve 9b, and the operating line 9c and the drain valve 9b are connected via a link 9d. The free end of the clutch lever 5c is rotatably engaged with the link 9d so that the drain valve 9b and the clutch lever 5c are interlocked with each other.

As can be seen from the above, the conventional power transmission apparatus has a complicated structure by incorporating a planetary gear so as to vary the rotational speed due to a difference in the required rotational speed between the washing stroke and the dehydration stroke. This poses a problem in that the manufacturing is difficult and the manufacturing cost is high.

In addition, the band type brake for sudden braking at the time of idling and dewatering of the rotating tub has a problem that friction noise is generated during operation. In particular, the band type brake has a strong braking force but has a weak braking force in the opposite direction, so that there is a problem that it is difficult to effectively suppress the idling of the rotating jets to be rotated in the forward and reverse directions. By adding a one-way clutch bearing to solve this problem, the assembling process was more difficult and the manufacturing cost was further increased.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a power transmission device for a washing machine capable of effectively suppressing idling of a rotary tub during washing.

It is another object of the present invention to provide a power transmission device for a washing machine which can accurately and easily transmit operation force externally transmitted.

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

2 is a bottom view of a conventional water tank.

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

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

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

Fig. 5 shows the washing time, and Fig. 6 shows the dehydrating time.

7 is a top view of a rotary member provided with a power transmission device according to the present invention, with the upper part thereof cut away.

8 is a sectional view of the drain valve.

Description of the Related Art [0002]

110: washing shaft 120: dehydrating shaft 130: connecting member 131:

132: external teeth 140: fixing member 150: rotary member 160:

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

181: Rotating gear 182: Rotating bar

In order to achieve the above object, a power transmission of a washing machine according to the present invention is characterized in that the upper end thereof is coupled to a rotary tub of the washing machine, and the lower end thereof is a hollow dehydrator shaft extending to a lower portion of a water tank of the washing machine, And a lower end fixed to the rotary shaft and a motor for driving the rotary blades, a fixing member fixed to the water tank, and the dehydrating shafts and the rotating shafts are integrally formed with the dehydrating shafts, And a protrusion provided on an outer surface of the elevating member is inserted into the elevating member to be elevated and lowered according to a rotating direction of the connecting member, An elevating guide member having an elevating guide hole provided so as to incline as much as possible, a rotating gear to which the projection of the elevating member is coupled as a lift member, And a rotating bar coupled to the rotating gear and the other end connected to a drain motor of the washing machine to rotate the rotating gear.

And a turning bar which is engaged with the turning gear so as to rotate the turning gear so as to rotate integrally with the turning bar, .

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

3 is a view showing an internal configuration of a washing machine employing the power transmission device according to the present invention. As shown in the figure, a water tank 11 is provided inside the body case 10. [ The rotary tub 12 is rotatably installed inside the water tub 11 and the rotary blades 13 are rotatably installed on the inner bottom surface of the rotary tub 12. A motor 20 for driving the rotary tub 12 and the rotary vane 13 is installed at the center of the lower outer surface of the water tub 11. The motor 20 rotates forward and reverse, A model capable of braking the jaws 12 and the rotary blades 13 is installed. A power transmission device 100 is provided between the motor 20 and these rotating bodies so that the rotational force of the motor 20 is selectively transmitted to the rotary vane 13 or the rotary vane 13 and the rotary vane 12 Thereby suppressing idling of the rotary tub 12 during washing. A drainage hose 14 for draining washing water is connected to one side of the lower surface of the water tub 11. The free end of the drainage lumen 14 extends to the outside of the main body case 10, 30 are interposed.

4, 5, and 6, the upper end of the power transmission apparatus 100 for a washing machine according to the present invention is coupled to the rotary tub 12, and the lower end thereof is connected to a hollow And the lower end of the washing shaft 110 is connected to the motor 20 and the dehydrating shaft 120 is connected to the motor shaft 120. [ A connection member 130 for coupling or separating the washing shaft 110 and a fixing member 140 for fixing the dewaxing shaft 120 to suppress idle rotation of the rotary tub 12.

The dehydrating shafts 120 are installed vertically through the water tub 11 so that the upper and lower ends of the de shrinking shafts 120 protrude inward and outward from the water tub 11 and the upper ends thereof are integrally coupled to the rotary tub 12. At this time, a reinforcing plate 191 is coupled to the portion where the dehydrating shafts 120 are penetrated to reinforce a portion to which the dehydrating shafts 120 are coupled, and a dehydrating shake 120 is formed between the reinforcing plate 191 and the dehydrating shafts 120 120 are rotatably supported. The upper end of the washing shaft 110 installed inside the dew condenser 120 is coupled to the rotary vane 13 and the lower end is extended to be coupled to the motor 20 and serially coupled to the rotary vane 13 at the upper end .

The lower end of the washing shaft 110 is extended to be exposed to the outside of the dew condensation shaft 120. The rotary member 150 is installed to rotate integrally with the washing shaft 110, A connecting member 130 coupled to the fixing member 140 at the time of lifting and coupled with the rotating member 150 at the time of lifting is attached to the dewaxing shaft 120 between the damping shafts 120, (Not shown). That is, the rotary member 150 is installed to rotate integrally with the washing shaft 110 in the form of a gear having the external teeth 151 formed therein, the internal teeth 141 are provided on the central portion of the fixing member 140, An external tooth 132 and an internal tooth 131 are formed on the upper and lower sides of the rotary member 150 to engage with the fixing member 140 at the time of lifting and engage with the rotary member 150 at the time of lowering. On the other hand, on the lower outer side of the dew condensation shaft 120 opposed to the connecting member 130, three grooves 121 extending upward and downward are equally spaced apart. On the inner side surface of the opposing connecting member 130, The protrusion 133 inserted into the protrusion 121 is provided to allow the connection member 130 to slide and move up and down while integrally rotating the protrusion 120 with the protrusion 120. The connecting member 130 moves up the dewaxing shaft 120 and is coupled to the fixing member 140 to fix or lower the dewaxing shaft 120 so that the dewaxing shaft 120 is coupled to the rotating member 150, So as to rotate integrally with the shaft 110.

And a structure for lifting and lowering the connecting member 130 is provided. That is, the elevating member 160 is installed so as to be raised and lowered integrally with the connecting member 130 and rotated. That is, the elevating member 160 provided in a ring shape is coupled to the connecting member 130 through the bearing 93 so that the elevating member 160 and the connecting member 130 are integrally provided do. At this time, a plurality of protruding protrusions 162 are formed on the lower inner side surface of the lifting member 160 to support the bearing 93 to be inserted therein, and a plurality of upwardly extending locking protrusions 163 And supports the bearing 93 on the upper side of the connecting member 130, thereby coupling the bearing 93 to the inside of the elevating member 160.

An elevation guide member 170 for guiding elevation of the elevation member 160 is provided on the outer side of the elevation member 160. An elevation guide hole 171 is formed in the elevation guide member 170 so that the projection 161 protruding outward from the outer side of the elevation member 160 is inserted and slidably moved. The elevating member 160 and the connecting member 130 are raised and lowered by causing the protrusion 161, which is inclined to the left and right, to move up and down along the inclined surface.

4, 5, 6 and 7, the pivoting member 180 is provided to rotate the lifting member 160 to move the connecting member 130 up and down. And is operated by a drain valve (30) having elasticity restoring force and a drain motor (40) for opening the drain valve (30). An operation line 41 is provided between the drain valve 30 and the drain motor 40 to connect the operation line 41 and the drain valve 30. A link 42 is interposed between the operation line 41 and the drain valve 30. The tiltable member 180 is coupled to the link 42 and interlocked with the drain valve 30 so that the external operating force is transmitted to the power transmission device 100.

The pivoting member 180 is disposed on the outer periphery of the elevation guide member 170 so that the free end of the projection 161 passing through the elevation guide hole 171 is coupled to the inner side surface of the pivoting member 180 And one end of the rotation gear 181 is engaged with the rotation gear 181 and the other end of the rotation gear 181 is connected to the operation line 41 to reciprocate the rotation gear 181 And a pivot bar 182 for pivoting. A groove 181b is formed in the inner surface of the turning gear 181 opposite to the projection 161 so that the projection 161 is inserted and engaged. The groove 181b extends vertically, 181 so as to move up and down along the elevation guide hole 171. The rotary bar 182 is provided so as to be rotated at both ends by a rotary shaft 183 fixed to the lower surface of the water tub 11. The rotary bar 182 is provided at one end thereof with a tooth 182a, And the other end is coupled to the operating rod 41 which reciprocates linearly 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. The operation rod 41 is disposed in a direction perpendicular to the longitudinal direction of the pivot bar 182 and the other end of the pivot bar 182 is provided with a protrusion 182b to be engaged with a coupling hole 42a formed in the link 42 So that both ends of the pivot bar 182 are rotated with the pivot shaft 183 as a starting point when the operating rod 41 is linearly moved. At this time, the pivot shaft 183 is biased toward the operating rod 41 in order to enlarge the pivotal width of the pivotal gear 181. The teeth 182a formed at one end of the pivot bar 1812 are extended in a circular arc shape close to a straight line so that the pivotal gear 181 can be rotated sufficiently.

The linear reciprocating movement of the operating line will be described in detail with reference to FIGS. 7 and 8. FIG. 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 And moves reciprocally by moving to the right. The drain valve 30 is provided at a bending portion of the drainage hose 14 and includes a bellows 31 for opening and closing the flow path and a spring (not shown) provided inside the bellows 31 32 and one end of which is coupled to the inner surface of the bellows 31 and the other end extends to be 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 an elastic restoring force.

The operation of the thus constructed power transmission apparatus will be described together with the operation of the washing machine.

First, I will explain the laundry administration. In the washing cycle, the connecting member 130 is lifted and engaged with the fixing member 140, and the dewaxing shaft 120 is separated from the washing shaft 110. In this state, the motor 20 rotates the washing shaft 110 in the forward and reverse directions at a rotational speed suitable for washing. The rotary blade 13 coupled to the washing shaft 110 rotating in the forward and reverse directions rotates in the forward and reverse directions to form a water flow, thereby performing a washing cycle. (Figure 4)

Next, the switching to the dehydration process will be described. The drain valve 30 connected to the operating rod 41 is opened and one side of the pivot bar 182 coupled to the link 42 is connected to the pivot shaft 183) in the counterclockwise direction (Fig. 7). As a result, one end of the rotation bar 182 is clockwise rotated, and the rotation gear 181 engaged with the rotation shaft 182a formed at one end is rotated clockwise (FIG. 7). The turning gear 181 rotates in the clockwise direction and rotates the projection 161 in the same direction. As a result, the projection 161 descends along the inclined surface of the elevation guide hole 171, so that the elevation member 160, which is interlocked with the projection 161 when moving up and down, and the rotary member 150, Respectively. That is, the inner teeth of the connecting member 130 are engaged with the outer side of the rotary member 150, and the connecting member 130 descends along the groove 121 formed on the dehydrating shaft 120. The protrusion 161 coupled to the rotating gear 181 that is not moved up and down moves up and down along the groove 181b formed on the inner surface of the rotating gear 181 in the vertical direction. (Figure 4)

The dewatering stroke is performed by rotating the motor 20 at a speed suitable for dewatering in the above state. That is, the rotational force of the motor 20 is transmitted to the rotary vane 13 and the rotary tub 12 through the washing shaft 110 and the dewaxing shaft 120 connected thereto, thereby rotating them at a high speed to generate centrifugal force, Is centrifuged.

When the washing operation is completed and the power is shut off by the drain motor 40, the operation line 41 and the link 42 are moved to the right side (Fig. 7) by the elastic restoring force of the drain valve 30 spring 33 . As a result, the rotation bar 182, the rotating gear 181, the elevating member 160 and the connecting gear 130 are rotated or elevated in the opposite direction to the switching to the dewatering stroke, .

INDUSTRIAL APPLICABILITY As described in detail above, the power transmission apparatus for a washing machine according to the present invention is capable of reliably preventing idling by suppressing idling of a rotating drum by engagement of gears during washing, There is an advantage. In addition, since the structure for preventing the idle rotation of the rotating tub and the transmission path of the motor rotating force is made by three gears, the manufacturing cost can be reduced.

Further, since the external operating force for switching the power transmission device is supplied using the gear engagement, the operating force is accurately and smoothly transmitted. It is also possible to improve the operability and assemblability of the component parts.

Claims (7)

The upper end of which is coupled to the rotary tub 12 of the washing machine and the lower end of which is connected to the hollow dehydrating shafts 120 extending to the lower portion of the water tub 11 of the washing machine, The upper end of the rotary shaft 13 is coupled to the rotary shaft 12 of the washing machine and the lower end thereof is coupled to the motor 20 for driving the rotary shaft 12 and the rotary blade 13. The washing shafts 110, A fixing member 140 fixed to the water tub 11, The dewaxing shafts 120 are integrally formed with the dewaxing shafts 120 so that the dewaxing shafts 120 are integrally formed with the connecting members 130 ), A lifting member 160 for lifting and lowering the connecting member 130, An elevation guide member 170 having an elevation guide hole 171 inclined so that a projection 161 provided on an outer side surface of the elevation member 160 is inserted and elevated in a rotating direction, A rotating gear 181 to which the protrusion 161 of the elevating member 160 is lifted and coupled, And a rotating bar (182) coupled to the rotating gear (181) at one end and connected to a drain motor (40) of the washing machine at the other end to rotate the rotating gear (181) . The method according to claim 1, A groove 181b extending upward and downward is provided in the turning gear 181 facing the projection 161 so that the projection 161 is inserted and coupled so as to rotate integrally but to be freely lifted and lowered. Power transmission device. 3. The method according to claim 1 or 2, The rotary bar 182 is rotatably supported at both ends by a pivot shaft 183 provided at the center of the rotary bar 182. The other end of the rotary bar 182 is provided with an operating rod 41 for linear movement by the drain motor 40 and the drain valve 30 of the washing machine. And is rotatable along a reciprocating motion of the operating rod (41). The method of claim 3, Wherein 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 method of claim 3, Wherein an external teeth 181a is provided on the rotating gear 181 and a tooth 182a engaged with the external teeth 181a is provided at one end of the rotating bar 182 with a constant width. Device. A protrusion 161 for moving up and down to provide a power switching force while rotating, A rotation gear 181 which is free to move up and down by the projection 161 and to be integrated with the rotation, And a turning bar (182) engaged with the turning gear (181) to rotate the turning gear (181). The method according to claim 6, The rotary bar 182 is provided so as to rotate in opposite directions with its pivotal shaft 183 at its both ends in the opposite direction and has one end 182a engaged with the external teeth 181a of the rotary gear 181 And a power transmission mechanism for the washing machine.