KR0136212Y1 - Driving gear of a washing machine - Google Patents

Abstract

The present invention relates to a driving device for a washing machine, and when washing, power is reduced from the motor shaft (73) through the reduction gear body (75) to be transmitted to the washing shaft (77), and when dewatering, the outer tank (61). In the driving device of the washing machine in which power is transmitted from the motor shaft (73) to the washing shaft (77) and the dewatering shaft (93) to drive the washing and dewatering tank (65) disposed inside the washing shaft ( To maintain the rotational balance of the washing machine while generating power to rotate the pulsator 67 and the pulsator 67 having an air chamber 67a therein to move 77) upward. A motor 63 disposed on the center line of the laundry shaft 77, power switching means 69 disposed below the outer tub 61 so as to change a transmission path of power generated by the motor 63; In order to rotate the pulsator (67) and the washing and dehydrating tank (65) at a uniform speed during dehydration. And engaging means 71 disposed on the lower side of the pulsator 67. Since the structure is constituted as described above, the rotational balance of the outer tub is maintained, the vibration noise of the washing machine is reduced, the structure is simplified, and the manufacturing cost is reduced. .

Description

Drive of washing machine

1 is a longitudinal sectional view showing a washing machine to which a conventional driving device is applied.

FIG. 2 is a longitudinal sectional view showing a driving device of the washing machine of FIG.

3 is a longitudinal sectional view showing a driving device of a washing machine according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: body 61: outer shell

63: motor 65: washing and dehydration tank

67: pulsator 69: power switching means

71: engaging means 73: motor shaft

75: reduction gear body 77: washing shaft

83 case 93 deaxing

103: connector 105: first gripping member

107: second locking member 111: connecting rod

115: insertion member 117: receiving member

123: planetary gear 125: connector

127: connecting shaft member

The present invention relates to a driving device of a washing machine, and in particular, by disposing the motor in a straight line on the washing shaft to transmit power and at the same time switching power by buoyancy of the pulsator, maintaining the rotational balance of the outer tub to make the noise of vibration of the washing machine It relates to a driving device of a washing machine that reduces manufacturing costs by reducing the structure and simplifying the structure.

Conventionally, as shown in FIG. 1, the outer tub 3 is installed in the washing machine main body 1, and the bottom surface of the outer tub 3 receives the rotational force of the motor 5 through the belt 7 and washes. A drive device 13 for driving the dewatering tank 9 or the pulsator 11 is fixedly installed.

In other words, a washing and dehydration tank 9 for dewatering the laundry cloth by the centrifugal force generated by the driving of the motor 5 is installed in the dehydration shaft of the driving device 13 in the outer tank 3. The pulsator which washes by forming a water flow in the wash water stored in the washing-and-dewatering tank 9 while repeating forward or reverse rotation in accordance with the driving of the motor 5 in the washing-and-dehydrating tank 9. (11) is provided on the washing shaft of the drive device (13).

The outer tub 3 is suspended in a tension bar 17 via a damper 15 so as to support the outer tub 3 and reduce vibration of the outer tub 3.

And, the upper side of the washing machine main body 1 is connected to the water tap 21 through the hose 19 is provided with water supply means 23 for supplying the washing water into the washing and dehydration tank (9) The lower surface of the outer tub 3 is provided with drainage means 25 for discharging the wash water.

In the conventional washing machine configured as described above, when washing cloth is put into the washing and dehydrating tank 9 disposed in the outer tank 3 and washing conditions are selected on a control panel not shown, hot or cold water is supplied through the water supply means 23. It is supplied to the washing and dewatering tank (9), and then the rotational force according to the operation of the motor (5) is transmitted to the driving device (13) via the belt (7), and this rotational force is decelerated in the driving device (13). It is transmitted to the pulsator 11 to rotate the pulsator 11.

At this time, the pulsator 11 performs washing by forming water flow in the washing and dehydrating tank 9 while repeating forward and reverse rotation. After the washing is finished, the washing water is discharged according to the operation of the drainage means 25, and when water is supplied through the water supply means 23, rinsing is performed several times, and the washing and dehydrating tank 9 is operated at high speed. By rotating, dehydration is performed from the laundry cloth by centrifugal force to complete the washing.

As shown in FIG. 2, the driving apparatus of the conventional washing machine includes a driving washing shaft 29 having a poly 27 fixed at a lower end thereof to receive a rotational force through the belt 7 according to the driving of the motor 5. It is free to rotate, the outer peripheral surface of the drive washing shaft 29 is inserted into the drive coupling 31 and at the same time the upper side of the drive coupling 31, the first dehydration shaft 33 is not shown floating member Is interposed rotatably installed, the upper portion of the first dehydration shaft 33 is coupled to the connector 35, which serves as a brake drum is rotatably connected to the first dehydration shaft 33 integrally.

The second dehydration shaft 37 is inserted and coupled to the upper side of the connector 35 so as to be freely rotated integrally with the connector 35, and the washing and dehydration tank is disposed on the upper portion of the second dehydration shaft 37. 9) is coupled to rotate freely integrally with the second dehydration shaft 37, the driven through the pulsator 11 coupled to the upper end via a bushing member (not shown) inside the second dehydration shaft 37 The washing shaft 39 is rotatably inserted.

On the other hand, inside the connector 35, the rotation of the drive washing shaft 29 is decelerated by a planetary gear (not shown) to be transmitted to the driven washing shaft 39.

In addition, the first dehydration shaft 33 is supported by a lower bearing 43 press-fitted into the lower case 41 so that the first dewatering shaft 33 is easily rotated in accordance with the rotation of the drive laundry shaft 29. The 37 is supported by the upper bearing 47 press-fitted in the upper case 45 so that it may rotate easily with the rotation of the said 1st dehydration shaft 33. As shown in FIG.

In addition, a brake lever may be provided on a middle outer circumferential surface of the connector 35 to prevent the washing and dewatering tank 9 from idling during washing and to brake the washing and dewatering tank 9 when the dehydration stops. The brake band 49 supported by 51 is arrange | positioned. Further, it is supported by the clutch boss 53 over the outer circumferential surface between the first dehydration shaft 33 and the drive coupling 31 to transmit the rotation of the drive laundry shaft 29 to the first dehydration shaft 33. The clutch spring 55 is disposed, and the clutch lever 53 is connected to the clutch boss 53 via the connecting member 57.

In the conventional driving device for a washing machine configured as described above, the brake lever 51 operates to wash the brake band 49 in a closed state, and the clutch lever 59 operates to release the clutch spring 55 in a loose state. Thus, the driving washing shaft 29 and the first dehydration shaft 33 are in a separated state.

Therefore, the rotational force by the motor 5 is decelerated in the planetary gear disposed in the connector 35 from the drive washing shaft 29 and transmitted to the driven washing shaft 39, and coupled to the upper end of the driven washing shaft 39. The washed pulsator 11 performs washing while being rotated forward and reverse. At this time, the washing and dewatering tank 9 is idling by the washing cloth and water flow, and this idling is prevented by the brake band 49.

However, at the time of dehydration, the brake lever 51 and the clutch lever 59 act in the opposite directions to the washing directions as described above, so that the brake band 49 is released and the clutch spring 55 is wound. The driving washing shaft 29 and the first dehydration shaft 33 is in a coupled state.

Therefore, the rotational force by the motor 5 is sequentially transmitted from the drive washing shaft 29 to the first dehydration shaft 33, the connector 35, and the second dehydration shaft 37, and the second dehydration shaft 37 is provided. Washing and dehydration tank (9) coupled to the outer peripheral surface of the rotating to perform dehydration. In the dehydration stop or power failure, the brake lever 51 is wound around the brake band 49 to stop the rotation of the washing / dehydration tank 9.

However, in the driving apparatus of the conventional washing machine configured as described above, since the rotational force of the motor 3 is transmitted to the drive washing shaft 29 through the belt 7, the motor is installed eccentrically on the bottom surface of the outer tub 3. (5) had a problem of causing vibration noise of the washing machine.

In addition, since the power is switched by the clutch and the rotation is restricted by the brake band, there is a problem in that the structure of the driving device is complicated.

Therefore, the present invention has been made to solve the above problems, the object of the present invention is to drive the washing machine to reduce the vibration noise of the washing machine by maintaining the rotation balance of the outer tank by transferring the power in a straight line to the washing shaft To provide a device.

Another object of the present invention is to provide a driving apparatus of a washing machine, by reducing the manufacturing cost by simplifying the structure by switching the power by the buoyancy of the pulsator.

The driving device of the washing machine according to the present invention made to achieve the above object is that the power is reduced from the motor shaft to the washing shaft through the reduction gear body to the washing shaft, and when dewatering, A driving apparatus for a washing machine in which power is transmitted from the motor shaft to a washing shaft and a dehydrating shaft to drive a dewatering tank, comprising: a pulsator having an air chamber therein for moving the washing shaft upward; A motor disposed on a center line of the laundry shaft to generate power to rotate and maintain a rotational balance of the washing machine, and a power switching means disposed below the outer tub to change a transmission path of power issued by the motor; And disposed at the lower side of the pulsator to rotate the pulsator and the washing and dehydrating tank at the same speed during dehydration. And engaging means.

In addition, the power switching means is a connector slidably coupled to the outer circumferential surface of the dehydration shaft, the connector is coupled to the first gripping member fixed to the motor shaft so that the rotation of the motor shaft is transmitted to the dehydration shaft, and It is characterized in that the connector is coupled to the first locking member fixed to the lower side of the outer tub to restrain the rotation of the washing and dehydration tank.

The engaging means may include an insertion member fixed to the washing and dewatering tank, and an accommodation member fixed to the washing shaft to be coupled to the insertion member so that the pulsator and the washing and dewatering tank rotate at the same speed. .

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected about the part same as the part shown in FIG. 1, FIG. 2, and the overlapping description is abbreviate | omitted.

In the present invention, as shown in FIG. 3, an outer tub 61 is installed in the washing machine main body 1, and a motor 63 is disposed below the outer tub 61 to generate power. Inside the outer tub 61, a washing-and-dehydrating tank 65 is disposed to dehydrate the laundry cloth by centrifugal force generated by the driving of the motor 63. The washing-and-dehydrating tank 65 is disposed inside the washing tank. The pulsator 67 which wash | cleans by forming a water flow in the wash water stored in the washing | cleaning and dewatering tank 65, repeating forward rotation or reverse rotation according to the drive of 63 is arrange | positioned. At this time, the motor 63 is disposed on the center line of the outer tub 61 to maintain the rotational balance of the outer tub 61.

Under the outer tank 61, a power switching means 69 is disposed to change the transmission path of the power generated by the motor 63, and the pulsator 67 and the washing and dewatering tank 65 are dehydrated. Engaging means 71 are disposed below the pulsator 67 so as to rotate at the same speed.

The washing shaft 77 is disposed inside the motor shaft 73 of the motor 63 by the reduction gear body 75 to rotate the pulsator 67. In this case, the laundry shaft 77 is freed to rotate about the motor shaft 73 by the sliding bearings 79 and 81, and the reduction gear body 75 is disposed at the lower end of the laundry shaft 77. The outer side of the reduction gear body 75, the case 83 is coupled to the lower side of the motor 63 by a plurality of fastening members 85, the outer tub through which the washing shaft 77 passes The packing member 87 is disposed in the through hole of the 61 to prevent leakage.

The dehydration shaft 93 is provided on the bottom of the washing / dehydrating tank 65 by a plurality of fastening members 89 to receive power from the power switching means 69 to rotate the washing-and-dewatering tank 65. It is fixed. At this time, the dehydration shaft 93 is disposed on the outside of the washing shaft 77 freely rotated with respect to the washing shaft 77 by the sliding bearing (95. 97), the dehydration shaft 93 is A packing member 99 is disposed in the through hole of the washing and dewatering tank 65 to penetrate the water.

The pulsator 67 is fixed to the upper end of the washing shaft 77 by the fastening member 101, buoyancy is applied to move the washing shaft 77 upwards inside the pulsator 67. An air chamber 67a to increase is formed.

The power switching means 69 is a slidable connector 103 is serration coupled to the outer peripheral surface of the dehydration shaft 93, the connector 103 is coupled to the rotation of the motor shaft 73 is the dehydration shaft ( The first catching member 105 is fixed to the upper outer circumferential surface of the motor shaft 73 so as to be transmitted to 93, and the connector 103 is coupled so that the rotation of the washing / dehydrating tank 65 is restrained. The lower side of 61 has a structure in which the second engagement member 107 is fixed. At this time, the thrust bearing 109 is supported by the connecting rod 111 so as to be freely rotated with respect to the washing shaft 77 in the connector 103, and is in close contact with the connector 103. Inside the member 107, the rotation bearing 113 is fitted to the rotational support of the dehydration shaft 93.

The engagement means 71 has an insertion member 115 fixed inside the washing and dewatering tank 65, and is coupled to the inserting member 115 to allow the pulsator 67 and the washing and dewatering tank 65. The receiving member 117 has a structure fixed to the outer circumferential surface of the laundry shaft 77 so that it rotates at the same speed.

The motor shaft 73 is rotatably coupled to the main body of the motor 63 by bearings 119 and 121. In addition, teeth 73a are formed on the outer circumferential surface of the lower end of the motor shaft 73 so as to be geared to the reduction gear body 75.

The reduction gear body 75 has a plurality of planetary gears (123) bite to the teeth (73a) of the motor shaft (73), the connector to transfer the rotational movement of the planetary gear (123) to the washing shaft (77) ( One end portion 125 is serration-coupled to a lower end portion of the washing shaft 77, and the other end portion thereof is connected to a central portion of the planetary gear 123 by a connecting shaft member 127. At this time, the reduction gear body 75 is accommodated in the case 83, the cover 129 is a plurality of fastening members 131 in the opening of the upper portion of the case 83 to protect the reduction gear body 75. It is fixed by.

The support member 133 is fixed to the bottom surface of the outer tub 61 so as to install a motor 63 generating power transmitted to the reduction gear body 75. At this time, the motor 63 is a plurality of fastening member 135 is inserted into the flange (63a) formed on the outer peripheral surface is fixed to the support member 133.

A through hole is formed in the middle portion of the washing shaft 77 so that the connecting rod 111 is inserted, and a serration tooth is formed at the lower end of the washing shaft 77 to be serration coupled to the connector 125. have.

The slide bearings 79 and 81 are fitted on the inner circumferential surface of the motor shaft 73 and loosely fitted on the outer circumferential surface of the washing shaft 77 so that the washing shaft 77 is easily rotated and moved up and down.

The case 83 has a substantially deep basin shape, and a flange 83a is formed at an upper end thereof to easily fix the case 83 to the motor 63, and an inner circumferential surface of the case 83 to be bitten by the planetary gear 123. Teeth 83b are formed, and at the bottom thereof, a through hole 83c is formed in communication with the outside air so that atmospheric pressure pushes the washing shaft 77.

A flange 93a is formed at an upper end of the dehydration shaft 93 to easily couple the dehydration shaft 93 to the bottom of the washing / dehydration tank 65, and an outer circumferential surface of the lower end of the dehydration shaft 93. The serration teeth are formed to be coupled to the serration on the inner circumferential surface of the connector 103.

The slide bearings 95 and 97 are fitted on the inner circumferential surface of the dehydration shaft 93 and loosely fitted on the outer circumferential surface of the washing shaft 77 so that the washing shaft 77 is easily rotated and moved.

A plurality of protrusions 103a are formed at the lower end of the connector 103 to be inserted into the first engagement member 105, and a plurality of protrusions 103a are inserted at the upper end of the connector 103 to be inserted into the second engagement member 107. Protruding portion 103b is formed.

Concave portions 105a and 107a are formed on the upper surface of the first catching member 105 and the lower surface of the second catching member 107 so that the protrusions 103a and 103b of the connector 103 are respectively inserted. At this time, the first gripping member 105 is forcibly fitted on the outer circumferential surface of the upper portion of the motor shaft 73.

The connecting rod 111 is inserted into a through hole formed in the laundry shaft 77 to support the thrust bearing 109.

The insertion member 115 is fixed to the inner bottom of the washing and dehydration tank (65). In this case, a plurality of protrusions 115a are formed on the upper surface of the insertion member 115 to be inserted into the accommodation member 117.

The receiving member 117 is forcibly fitted to the outer circumferential surface of the laundry shaft 77. At this time, a plurality of recesses 117a are formed on the bottom of the receiving member 117 so that the protrusion 115a of the inserting member 115 is inserted.

A plurality of reinforcing ribs 133a are formed on the outer surface of the support member 133 to reinforce the support member 133.

In the driving operation of the washing machine according to an embodiment of the present invention configured as described above, when water is filled in the washing and dehydrating tank 65, the air chamber 67a formed in the pulsator 67 The pulsator 67 in which buoyancy is increased is moved upward. At this time, the moving force of the pulsator 67 is increased by the atmospheric pressure acting on the lower surface of the washing shaft 77 through the through hole 83c of the case 83.

Therefore, as shown in FIG. 3, the connector 103 of the power switching means 69 moves upward by riding the serration of the dehydration shaft 93, so that the protrusion 103a of the connector 103 is formed in the first direction. Separated from the concave portion 105a of the gripping member 105, the protrusion 103b of the connector 103 is inserted into the concave portion 107a of the second gripping member 107, and of the engaging means 71 The recessed part 117a of the receiving member 117 is separated from the protrusion 115a of the insertion member 115. The lower end of the washing shaft 77 is coupled to the connector 125 of the reduction gear body 75.

Next, the motor 63 is operated by the control of a control means (not shown), and the rotational force by the motor 63 is decelerated in the reduction gear body 75 coupled to the lower shaft of the motor shaft 73 to wash the shaft. Transmitted to (77), the pulsator 67 coupled to the upper end of the washing shaft 77 performs the washing while the forward or reverse rotation.

At this time, the washing and dehydration tank 65 is connected to the outer tub 61 through the dehydration shaft 93, the connector 103 and the second locking member 107 in order to restrict the rotation, It does not run idle because it is free from the effects of the cloth and water streams.

Next, at the time of dehydration administration, when cold water is discharged inside the washing-and-dehydration tank 65, the pulsator 67 moves downward by the weight of the washing cloth and the weight of the spreader 67. FIG.

Therefore, as shown in FIG. 4, the connector 103 of the power switching means 69 moves downward by taking the serration of the dehydration shaft 93, and the protrusion 103a of the connector 103 is removed. 1 is inserted into the recessed portion 105a of the engagement member 105, the protrusion 103b of the connector 103 is separated from the recessed portion 107a of the second engagement member 107, and the engagement means 71 The recessed portion 117a of the receiving member 117 is extrapolated to the protrusion 115a of the insertion member 115. Then, the lower end of the washing shaft 77 is separated from the connector 125 of the reduction gear body 75.

Next, the motor 63 is operated by the control of a control means (not shown), and the rotational force by the motor 63 is fixed to the upper side of the motor shaft 73 by the first gripping member 105 and the connector ( 103, the rotational force transmitted to the washing and dewatering tank 65 in sequence through the dehydration shaft 93, the insertion member 115 of the engaging means 71 Since the laundry shaft 77 is rotated by being transferred to the receiving member 117, the washing / dehydrating tank 65 and the pulsator 67 rotate at the same speed to dehydrate the laundry cloth.

Therefore, the power transmission path simply changes without a separate operation means, and the structure of the driving device is simplified.

As described above, the driving device of the washing machine according to the present invention arranges the motor in a straight line on the washing shaft to transmit power and at the same time, by switching the power by buoyancy of the pulsator, maintaining the rotation balance of the outer tub to make the noise of vibration of the washing machine. It is a very practical design to reduce manufacturing costs by reducing the cost and simplifying the structure.

Claims (3)

The lower part of the washing and dehydration tank is equipped with an air chamber 67a inside the bottom of the washing and dehydrating tank 65, and the pulsator 67, which is buoyant by the washing water at the time of washing and rises on the water surface, is mounted on the upper part. The washing shaft 77 is selectively engaged with the reduction gear body 75 having a plurality of planetary gears 123 to variably control the rotation speed with the plurality of planetary gears 123, and the washing shaft 77 ) And a dehydration shaft (93) integrally mounted on the bottom of the washing and dewatering tank (65) having a hollow motor shaft (73) for accommodating therein and extending through the outer tub (61). And a power switching means (69) installed between the dehydration shaft (93) and the motor shaft (73) to selectively interrupt power transmission therebetween during washing and dehydration, and the washing shaft (77) and washing and Installed between the dehydration tank (65) to selectively control the rotation between them during washing and dehydration It consists of a bite means 71: During washing, the power switching means 69 short-circuits the connection between the motor shaft 73 and the dehydration shaft 93 as the pulsator 67 rises. ) Is rotated through the reduction gear body 75 and then transferred to the washing shaft 77 so that only the pulsator 67 in the washing and dewatering tank 65 is rotated, and the pulsator 67 is dehydrated. As the engagement means 71 connects between the washing shaft 77 and the washing and dehydrating tank 65, the power switching means 69 connects between the motor shaft 73 and the dehydrating shaft 93. Rotation of the motor shaft 73 is directly transmitted to the washing and dewatering tank 65 and the washing shaft 77 through the power switching means 69, the dehydrating shaft 93, and the engaging means 71 to rotate them at high speed. Drive of the washing machine, characterized in that configured to. The connector 103 according to claim 1, wherein the power switching means (69) is splined to the bottom outer surface of the dehydration shaft (93), and has a connector (103) mounted thereon with upper and lower protrusions (103a, 103b), respectively. The first engaging member 105 and the projection of the connector 103 are integrally coupled to the upper end of the motor shaft 73 by having a concave inlet 105a selectively connected to the projection 103a of the 103 when dewatering. Driving device for a washing machine, characterized in that the second engaging member (107) integrally coupled on the bottom surface of the outer tub 61 having a concave inlet (107a) selectively connected to the washing (103b) when washing. According to claim 1, wherein the engaging means 71 is a protruding insert member 115 fixed to the upper surface of the washing and dewatering tank 65, and the indentation portion which is connected to the insertion member 115 when dewatering ( Driving device for a washing machine comprising a receiving member (117) integrally mounted on the washing shaft (77) with a 117a.