KR0126078B1 - Direct driving apparatus of a washing machine - Google Patents

Abstract

A direct drive for producing a lighter washer by minimizing the power transmission device is provided. In a typical washer, the main-shaft(4) of the pulsator(2) is in the spin-shaft(3) of the washing tub(1). A brake drum(5) is added to the spin-shaft(3) as a control unit. Under this, a rachet(6a), on whose peripheral plate a fixing tool(7) is hooked, is formed as a clutch unit. A spring clutch(6), inside of which a spring band(8) and a bloc(9) are formed, is added. Under this, a linear gear(10), planetary gear(11), and inside gear(12) are formed as the differential reduction gear. The linear gear(10) is installed on the shaft(16) of the motor(15), which is in-line with the main-shaft(4), the inside gear(12) is fixed on the housing(14), and the upper carrier(13) of the planetary gear(11) is added to the lower part of the main-shaft(4) so that the main-shaft(4) and the shaft(16) of the motor(15) are in-line to form a shaft. An inverter(17) is connected to the motor(15). This device enables a reduction in the size of the motor since there will be no power loss at low rpm due to the direct drive by the reduction gear. Additionally, since a pulley and a belt are not used, there will be no noise and vibration will be reduced.

Description

Direct drive of fully automatic washing machine

1 is a main cross-sectional view of the washing machine in which the present invention is installed.

2 is an enlarged cross-sectional view of the main portion of the present invention.

3 is a plan view illustrating a differential reduction gear unit of the present invention.

4 is an exploded perspective view illustrating the clutch unit of the present invention.

* Description of the symbols for the main parts of the drawings *

3: spin axis 4: main axis

5: brake drum 6: spring clutch

7: hanging strip 8: spring band

10: sun gear 11: planetary gear

12: internal gear 13: carrier

15 motor 17 inverter

In the present invention, in the automatic washing machine, a shaft of a motor controlled by an inverter (Inverter) and a shaft of a pulsator are formed in a linear one-axis structure, but the motor is integrally equipped with a differential gear drive on the top. It consists of a geared motor type, and the clutch assembly and brake assembly are arranged on top of each other, so that the power loss can be smoothly changed according to washing and dehydration operation even when the power of the motor is directly transmitted. The present invention relates to an invention in which a small motor of low power can be used, but also to reduce the eccentricity of the center of gravity and to minimize the power transmission device to reduce the weight of the washing machine.

In general, the automatic washing machine has a high torque at low speed (about 150 RPM and a torque: 250 kg-cm), which is a driving condition required for washing, and a low torque (about 750 RPM, 30 kg-cm, at a high speed, which is required for dehydration). In order to simultaneously satisfy the above conditions, there is a need for an apparatus for appropriately switching the above two driving conditions according to washing and dehydrating operations.

In order to satisfy this problem, the conventional washing machine has a two-axis structure, and the power source of the motor is transferred to another shaft provided with a reduction gear device by a pulley or a belt. High torque was satisfied, and when dewatering, a slight deceleration with a pulley or a belt was performed without using the reduction gear device to satisfy the high / low torque dehydration driving requirement.

Therefore, the washing machine of the two-axis structure is separate from the power transmission device by the belt and pulley and the motor driving source for power switching during washing and dehydration in order to have a load torque difference and rotation aberration during washing (including rinsing) and dehydration. There is a problem that the complexity and hypertrophy and the center of gravity of the washing machine are eccentric due to the complicated reduction gear device formed by the shaft, the clutch device, the mechanical brake device, the anti-rotation device of the washing tank and the like.

In other words, in order to switch the load difference during washing and dehydration, the conventional fully automatic washing machine has formed a transmission shaft separately from the motor shaft of the prime mover. Since the eccentricity of the power drive source and the installation state of the whole device are asymmetric, the center of gravity of the washing machine cannot but be eccentric, so that a separate weight must be installed to solve this problem, and the weight of the washing machine becomes more heavy than necessary, especially according to the input power frequency. Synchronous induction motors and DC motors have extreme limitations in generating high power loss and low speed / high torque in the low speed (rpm) band.To compensate for this, increase and apply the number of poles of the motor The power supply frequency needs to be lowered, which also limits efficiency and high torque output. There is a problem that the size of the motor should be larger than necessary compared to the output.

In addition, in the conventional fully automatic washing machine, since the driving method of the motor is driven by triacs, the washing power is easily graded by controlling the energization time of the power applied to a constant motor power (for example, standard washing high and low). In addition, it is possible to control the power within a certain range, but this is due to the limitation of the rotational speed due to the synchronization of the induction motor due to the frequency of the applied power and the number of poles of the motor. There is a limit in the setting of the grading of washing ability, according to the control of the time to cause the water flow by a single water flow. As it performs dehydration function, it does not damage the laundry at constant rotation speed (water flow) regardless of the type and quantity of laundry. If there is something.

According to the present invention, the main shaft of the motor and the main shaft of the pulsator are interlocked to form a single-axis structure in a vertical line, so that the belt can smoothly switch power during washing and dehydration by the direct power of the motor without using poly, and the rotation speed of the motor is In order to solve the above problems or shortcomings by variously adjusting by the inverter as described in detail by the accompanying drawings as follows.

In the main shaft 4 of the pulsator 2 provided in the spin shaft 3 of the washing tank 1, the brake drum 5 is arranged as a braking portion on the spin shaft 3, and as a clutch portion under the spin shaft 3. On the outer circumferential surface, a ratchet 6a on which the hanging strip 7 is hung is formed, and a spring clutch 6 having a spring band 8 and a block 9 is formed therein, and a sun gear 10 as a differential reduction gear part at the bottom thereof. ), The planetary gear 11 and the inner gear 12, the sun gear 10 is installed on the shaft 16 of the motor 15 located in line with the main shaft 4 and the inner gear 12 is a housing ( 14, the upper carrier 13 of the planetary gear 11 is laid down on the lower end of the main shaft 4, and the main shaft 4 and the shaft 16 of the motor 15 are formed in a single shaft structure. In the drawings, reference numeral 18 is a bracket, 19 is a reservoir, 20 is a one-way clutch needle bearing, and 21 is a brake band. It said (6c) is a stopping groove formed in the groove (6b) of the spring clutch (8a) is a projection of the spring band (8).

The process of operating the present invention of such a configuration is first transferred to the shaft 16 when the motor 15 is driven after a suitable amount of water is filled in the washing tank 1 by the automatic program input when performing the washing process The power source is transmitted to the sun gear 10 of the differential reduction gear unit, and at this time, the power source reduced by about 1/5 to the carrier 13 by the engagement ratio of the sun gear 10 and the planetary gear 11 is programmed accordingly. As the inverter 17 rotates the motor 15 intermittently left and right, the pulsator 2 rotates at low speed and high torque to the left and right to rotate the laundry, and at the same time, rotates the laundry required for washing. It is generated and washed.

Then, when the main shaft 4 for rotating the pulsator 2 receives the decelerated power source and is in the forward direction (clockwise when viewed from the upper surface of the washing tank 1), the block 9 fitted to the main shaft 4 is a spring band 8. ), But at this time, the lug (7) hanging on the ratchet (6a) grasps the spring clutch (6), so that the projection (8a) of the spring band (8) fitted in the inner groove (6b) of the spring clutch Since it prevents tightening of the spring band 8, the power is not transmitted to the spin shaft 3 of the washing tub 1 which is in contact with the upper side of the spring band 8, and the main shaft 4 and the pulsator 2 arranged thereon are not driven. Only rotates smoothly.

In addition, when the main shaft 4 is turned left, the spring band 8 is actuated in the direction of release, so that the bore is widened so that the rotational force of the block 9 is not transmitted. Only the main shaft 4 and the pulsator 2 are turned left.

In the present invention, the washing tank 1 is subjected to the force to rotate in the same direction by the load of the rotational flow generated as the laundry is reversed and reversed in the washing tank 1 during the washing administration, in particular, during the rotation of the pulsator 2. In order to effectively rub the washing tank 1 and the laundry, the rotation of the washing tank 1 should be suppressed. When the washing tank 1 is in the forward direction (clockwise when viewed from the upper surface of the washing tank), the brake drum 5 of the brake unit is braked to suppress it, and in the reverse direction (counterclockwise when viewed from the upper surface of the washing tank), the one-way clutch and the knee These bearings 20 to brake the rotation of the washing tank to perform the washing function effectively.

When the dehydration stroke is performed after the washing stroke by the inputted program, the brake of the brake drum 5 is released, and the spring clutch 6 is released from the ratchet 6a by the ruler 7. The tightening force is lost.

In this state, when the main shaft 4 is rotated in the direction in which the spring band 8 is tightened (clockwise when viewed from the upper surface of the washing tub 1) by the driving of the motor 15, the block 9 and the spring band 8 ), The block 9 causes the spring band 8 to be tightened by the friction force between the two, so that the spin shaft 3, which is powered by the strong pressing force of the spring band 8, moves together with the main shaft 4 in the same direction. Rotate

However, in this case, the washing tank 1 and the pulsator 2 need to be driven at high speed and low torque in order to dehydrate the present invention. According to the present invention, the differential reduction gear unit is installed in a single shaft structure between the motor 15 and the main shaft 4. Because of the driving method, only the power of the motor 15 is reduced to about 1/5 according to the ratio between the gears of the sun gear 10 and the planetary gear 11 of the differential reduction gear unit.

However, at this time, the present invention can drive the motor 15 at a high rotational speed that cannot be obtained by a general commercial power supply by applying a high frequency (about 200 Hz) by an inverter, so that the rotational force of the motor 15 is reduced to 1/5. Even if it is correspondingly to increase the rotational force of the motor 15 can be smoothly provided a high / low torque rotational force required for dehydration.

In addition, the washing tank assembly of the washing machine rotating at a high speed by the dehydration stroke is braked by the friction between the brake band 21 and the brake drum 5 wound around the outer diameter side of the brake drum 5.

As described above, the present invention has a single shaft structure in which the differential reduction gear unit, the clutch unit, and the brake unit, which are required for power switching during washing and dehydration, are installed on the main shaft 4 and the shaft 16 of the motor 15 installed in a straight line. Since the power of (15) is transmitted directly, there is almost no power loss even at low speed rotation of the main shaft (4) for the washing process, thereby reducing the power consumption, and the rotation direction and power of the motor (15) by the inverter (17). It can be controlled more extensively, and the power can be changed smoothly, and according to the type and quantity of laundry, the water flow type, the grade of washing ability, the rotational power during dehydration can be used more precisely and widely. It is.

In addition, the differential reduction gear, clutch and braking parts required for power switching are installed in a single-axis structure, so the center of gravity of the washing machine is not eccentric, so it is not balanced by unnecessary weight bodies as in the prior art. Therefore, there is no power loss at low speed, so the motor size can be reduced, and there is also an effect of reducing noise and vibration by not using a pulley or a belt.

Claims (1)

In the main shaft 4 of the pulsator 2 is provided inside the spin shaft 3 of the washing tank 1, a brake drum 5 for braking is fitted to the spin shaft 3 protruding to the bottom surface of the water storage tank 19. Then, a ratchet 6a is installed on the outer circumferential surface and a spring clutch 6 having a spring band 8 and a block 9 installed therein is inserted into the lower portion of the brake drum 5, but the spring band 8 is a spin shaft ( 3) The outer circumferential surface is inserted into a fold, and the block 9 is installed into the main shaft (4) to fold in contact with, the lower portion of the inner gear 12, a plurality of planetary gears 11 and the sun gear (connected to the carrier 13) 10, the differential reduction gear unit is installed, and the upper carrier 13 is connected to the main shaft 4, and the sun gear 10 is fitted with the shaft 16 of the motor 15 so that the main shaft 4 and the motor shaft 16 are connected. Direct drive device for a fully automatic washing machine characterized in that to form a straight one-axis structure.