JPH04122291A - Drum type washing dryer - Google Patents

Abstract

PURPOSE:To drastically improve durability and secure the sufficient dehydration performance by adopting a brushless motor and adopting the gear reduction in the low speed revolution for washing. CONSTITUTION:A driving motor consists of a brushless motor 9, and a turning moment transmission means 8 consists of the driving shaft 4 of the brushless motor 9, output shaft 23 which is installed coaxially and in relatively turnable manner on the outer periphery of the driving shaft 4, belt pulley 5 fixed on the output shaft 23, belt 6 laid between a belt pulley 7 and a rotary drum 3, reduction gear mechanism 8 for decelerating the revolution power supplied from the driving shaft 4, motor clutch 17 for transmitting the deceleration revolution power supplied from the reduction gear mechanism 8 to the output shaft 23 only in washing and drying operation, and a centrifugal clutch 14 which is fixed on the driving shaft 4 and selectively transmits the turning power supplied from the driving shaft 4 to a belt pulley in dehydration operation. Accordingly, the motor replacement within the product life as the defect of the product having a commutator motor mounted and the noise generated by a brush in high speed revolution can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Application Field The present invention provides a method in which a drum serving as both a washing tub and a dehydrating tub is horizontally supported by a shaft, and the drum performs washing and drying at low rotation speeds and centrifugal dehydration. This relates to a drum-type washer/dryer that operates at high rotation speeds.

(b) Problems to be solved by conventional techniques and inventions In general, this type of drum-type washing machine performs washing, dehydration, and drying by changing the number of rotations of the drum. When using a slave motor to change the number of revolutions during washing, drying, and dehydration, the life of the commutator motor is short and the motor must be replaced within a short period of time. It is also possible to change the number of rotations by changing the number of poles of the induction motor, but in that case, the number of rotations during washing, drying, and dehydration would be limited, and it would not be possible to limit the number of rotations to the desired number. Both parties were unable to perform their tasks efficiently.

The present invention has been made in view of these points, and uses a brushless motor to improve the durability of the motor and allows the drum rotation speed during both washing and spin-drying to be set to a desired rotation speed.

By the way, by adopting a brushless motor, the blunt wear that can occur with commutator motors is eliminated.
While this greatly improves durability, current brushless motors are extremely expensive to produce high torque comparable to commutator motors. Since the maximum rotational speed is lower than that of a commutator motor, if the reduction ratio is increased and the motor is used at high torque, the dehydration rotational speed will be low and the dewatering performance will be insufficient.

Therefore, the present invention employs gear reduction during low-speed rotation for washing, allowing use with high torque, while at high-speed rotation for spin-drying, gear reduction is stopped using a motor switching clutch and a centrifugal clutch to ensure sufficient dewatering performance. The purpose of the present invention is to provide a drum-type washer/dryer that can be operated at high rotational speeds.

(c) Means and operation for solving the problems This invention comprises a main body case, a rotating drum that doubles as a washing tub and a dehydrating tank and is supported horizontally in the main body case, a drive motor, and a rotary drum that serves as a washing tub and a dehydration tank, and a rotary power transmission means for transmitting the rotary power of the brushless motor to the rotating drum, the drive motor is a brushless motor, and the rotary power transmission means is coaxial with the drive shaft of the brushless motor and can rotate relative to the outer periphery of the drive shaft. an output shaft provided on the output shaft, a belt pulley fixed to the output shaft, a belt suspended between the belt pulley and the rotating drum, and a reduction gear for decelerating the rotational power from the drive shaft. a motor clutch that transmits the deceleration rotational power from the deceleration rotation gear mechanism to the output shaft only during washing/drying operations, and a motor clutch that is fixed to the drive shaft and transmits the rotational power from the drive shaft to the belt pulley during the dehydration operation. This is a drum-type washer/dryer consisting of a centrifugal clutch that switches transmission.

That is, this invention uses a brushless motor (variable speed motor) as the drive motor for the rotating drum, and operates a reduction gear mechanism to generate high torque power by decelerating during washing and drying operations, while operating a centrifugal clutch during dehydration operations. High-speed rotational power can be directly transmitted to the rotating drum from the drive shaft of the brushless motor.

(d) Embodiment FIG. 1 schematically shows the structure of a drum-type washer/dryer according to an embodiment of the present invention, and the schematic structure will first be explained. ■ is an exterior body as a main body case, 2 is a water tank, 3 is a rotating drum that also serves as a washing tub and a dehydration tank, 4, 4a and 4b are drum shafts that support the rotating drum 3, 5
8 is a drum pulley that is fixed to the drum shaft 4 and transmits the rotation of the boot via the belt 6, and 8 is a brushless motor (
A transmission mechanism assembly serves as a rotary power transmission means for varying the rotation speed of the variable speed motor) 9, and IO is a drain valve that drains the washing liquid or tin liquid in the water 11F2.

FIG. 2 shows a cross section of the variable speed mechanism assembly 8 during washing, and 11 is a motor shaft of the motor 9, which has a sun gear 12 that meshes with a planetary gear 13, and a weight 14 of the centrifugal clutch mechanism. The clutch arm 15 rotates periodically through the clutch arm 15. A planetary gear support 16 supports the planetary gear 13 and is fitted with the motor clutch 17. Reference numeral 18 denotes an internal gear that meshes with the planetary gear 13 and is fixed by an outer box 19. The control plate I'd of the motor clutch 17 is in a state where it has been pulled out from the roller 17b by the signal motor 20.

The weight 14 of the centrifugal clutch mechanism is attached to the motor shaft II.
Since the rotation speed of the pulley 7 is low (less than 60 orpm), the clutch spring 22 pulling inward pulls the pulley 7.
has not been in contact with. In addition, especially in Fig. 6, 14a
is the lining.

FIG. 3 is an explanatory diagram of the operation of the motor clutch during washing,
The roller (or roller) 17b is integrated with the cage 17C.
The spring is pressed so as to bite between the inclined surface of the outer ring 172L and the output shaft 23.

The driving force is transmitted to the output shaft 23 by the rollers 17b when the outer ring 17a is rotated counterclockwise, and by the rollers 17b' when the outer ring 17a is rotated clockwise. With the above configuration, the rotation of the motor 9 is decelerated by the planetary gear and the belt, that is, the planetary gear support 16, the motor clutch 17, the output shaft 23,
The drum 3 is rotated at a predetermined speed using the belt pulley 7 and the belt 6.
tell.

Figure 4 shows a cross-section of the variable speed mechanism assembly during dewatering.The control plate 17d of the clutch motor is inserted between the roller 17b and the output shaft 23 by the signal motor 20 and is in the L state. , the rotation of the planetary gear support 16 and the output shaft 2
Rotation 3 is free. Since the clutch weight 14 rotates at a high speed with the motor shaft 11 rotating at a speed of 60 rpm or more, the centrifugal force of the clutch weight 14 is greater than the clutch spring 22 pulling inward, and the clutch weight 14 comes into pressure contact with the pulley 7. Therefore, the rotation of the motor 9 is freed from deceleration by the planetary gear and is only decelerated by the belt, thereby transmitting a predetermined dewatering rotation to the drum 3.

FIG. 5 shows a cross-sectional view of the operation of the motor clutch during dewatering. A state in which the signal motor 20 rotates freely between the outer ring 17a and the output shaft 23 by pushing the control plate 17d (via the roller push plate if inserted) is shown.

In the figure, the guide bin portion of the control plate 17d is shaped to allow the roller 17b to rotate freely in only one direction, but it is also possible to allow the roller 17b to rotate freely in both directions.

In addition, in the drum-type washing machine with the above configuration, the drum rotation speed during washing is 50 rpm, and the drum load torque is 9.
cm, drum rotation speed when starting dehydration is 80 rpm, drum load torque 150Ky・Cff1, drum rotation speed during dehydration is looorpm, drum load torque 30Kg・co
It turned out that driving was smoother when set to +.

In addition, when set with this specification, the variable speed width is 20 (100
0150). If the variable speed range used for the brushless motor is set to 4, taking into consideration the motor price, the gear shift will be 5 (2
0/4). Due to the torque characteristics of the motor used, the reduction ratio of drum rotation to pulley rotation is 1/1.5.
It was set to With the above settings, the motor rotation speed during washing is 375 rpm (gear reduction 115, belt reduction 1
/1.5) 600 rpm at start of dehydration (gear reduction 115
, belt deceleration 1/1.5) during spin-drying becomes 1500 rpm (belt deceleration 1/1.5), and the motor load torque is 40 to 9 cffI (300 x gear reduction 115 x
Belt deceleration 1/1.5) 20 when starting dehydration?・am(
150x gear reduction 115x belt reduction L/1.5) 20Kg・c+* (30c@X belt reduction 1/15) when dewatering
).

From the above motor rotation, it can be seen that the motor rotation speed at which the centrifugal clutch operates should be set at 600 rpm or more and 1500 rpm or less. At that time, it is necessary to switch the clutch using the signal motor to free the output shaft from gear rotation.

The configuration of the drum type washer/dryer is summarized as follows.

The structure consists of a variable-speed motor and a speed reducer with a certain reduction ratio to switch the centrifugal clutch. It consists of an internal gear that meshes with the gear, a planetary gear support that supports the planetary gear, and a clutch that connects or disconnects the planetary gear support and the output shaft. A signal motor is installed outside the gear box, and the operation of the signal motor switches the clutch, and the planetary gear support and output shaft are switched between fixed and free. The output shaft is a hollow shaft to which a pulley is fixed, and when it is fixed by a signal motor, it transmits deceleration rotation to the pulley. Since the motor shaft is fixed to the clutch arm that holds the weight of the centrifugal clutch, when the rotation required for switching the centrifugal clutch is reached and the output shaft becomes free, the motor shaft will release the lining that is glued to the weight. It is friction welded through and transmits rotation at the same speed as the motor to the pulley.

With the above configuration, this drum-type washer/dryer can transmit the motor rotation to the drum at a slow and slow speed during washing, and at a directly connected high speed during spin-drying.

(E) Effects of the Invention According to the present invention, it is possible to eliminate the problem of replacing the motor within the product life, which was a drawback of conventional products equipped with a commutator motor, or
Each is freed from noise generated by brushes during high-speed rotation. Also, unlike products equipped with induction motors, there is no drop in dewatering performance.

As described above, the present invention provides an inexpensive motor for driving a drum of a drum-type washing machine while employing a brushless motor.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration explanatory diagram showing one embodiment of the present invention, and FIG.
Figure 3 is a cross-sectional view explaining the operation of the variable speed mechanism during washing, Figure 3 is a diagram explaining the operation of the motor clutch during washing, Figure 4 is a view equivalent to Figure 2 when the variable speed mechanism is dewatered, and Figure 5 is the illustration of the motor clutch. 3 is a view corresponding to FIG. 3 during dewatering, FIG. 6 is a front view of the centrifugal clutch, and FIG. 7 is a perspective view illustrating the relationship structure and operation between the motor clutch and the planetary gear support. 1...Exterior body (main body case), 3...Rotating drum, 5...Drum pulley, 6
...Belt, 7...-Pulley, 8...
・Transmission mechanism assembly (rotational power transmission means) 9...Brainless motor. Figure 1 Figure 6 Figure 7 (a) (C) 7h

Claims (1)

[Claims] 1. A main body case, a rotating drum that doubles as a washing tub and a dehydration tank and is horizontally supported within the main body case, and a drive motor;
A rotary power transmitting means for transmitting the rotary power of the drive motor to the rotating drum, the drive motor being a brushless motor, and the rotary power transmitting means being coaxial with the drive shaft of the brushless motor and the outer periphery of the drive shaft. An output shaft provided to be relatively rotatable, a belt pulley fixed to the output shaft, a belt suspended between the belt pulley and the rotating drum, and a deceleration device for decelerating the rotational power from the drive shaft. The gear mechanism and the deceleration rotational power from this deceleration rotation gear mechanism are used for washing and washing.
A motor clutch that transmits power to the output shaft only during drying operation,
A drum-type washer/dryer comprising a centrifugal clutch fixed to the drive shaft and selectively transmitting rotational power from the drive shaft to a belt pulley during dewatering operation.