JPS60225592A - Drum type washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Technical Field) The present invention is directed to two types of drum-type washing machines equipped with a dehydrating function:
It is something that

(Prior art) In general, this type of drum-type washing machine performs washing and dehydration by changing the rotation speed of the rotating drum, but conventionally a single motor is used, and only minute changes of this motor are performed. If you try to change the rotation speed of the rotating drum using This meant that both parties were unable to carry out their work efficiently.

(Purpose) The present invention has been made in view of the above points, and employs a motor pole number conversion system to enable the rotation speed of the rotating drum during washing and dehydration to be set to a desired rotation speed. It is.

(Embodiment) FIGS. 1(a) and 1(b) schematically show the structure of a drum-type washer/dryer in an embodiment of the present invention, and first, the schematic structure will be explained. 1 is the outer casing, 2 is the dehydration tank, 3
4 is a porous rotating drum, 4 is a hollow drum shaft that supports the rotating drum 3, 5 is a pulsator shaft that is rotatably penetrated and supported by the drum shaft 4, and 6 is fixed to the pulsator shaft 5 within the rotating drum 3. A pulsator, 7 a water supply valve for controlling the water supply to the dehydration tank 2, 8 a drainage box provided at the bottom of the dehydration tank 2, 9 a drainage hose connected to the box 8 with a drainage valve 10 inserted therein, and 11 a drying valve. 12 is a blower fan that converts the drying air into warm air by the heater 11 and sends it into the dehydration receiving tank 2; 13 is a driving source for the rotating drum 3, the pulsator 6, and the blower fan 12; The motor that rotates, 14 is the motor tab =
9.15 is a drum pulley provided on the drum shaft 4, 16 is a belt provided between both pulleys 14.15, and 17 is a drum shaft 4.
This is a planetary gear device interposed between the inner surface of the side drum pulley I5 and the pulsator shaft 5.

FIG. 2 is a diagram for explaining the power transmission path of the motor. In FIG. 2, the power of the motor 13 is transmitted to the motor pulley 14 via a reduction gear device 18 and a clutch device 19, which will be described in detail later, and further transmitted to the rotating drum 3 via a belt 16, a drum pulley 15, and a drum shaft 4. Ru. Further, during washing, the rotation of the rotating drum 3, that is, the rotation of the drum shaft 4, is accelerated by the planetary gear device 17 and transmitted to the pulsator shaft 5, so that the pulsator 6 rotates at a higher speed than the rotating drum 3. The planetary gear device 17 has a sun gear fixed to the pulsator shaft 5 and an internal gear fixed to the inner surface of the drum pulley 15, respectively, and the carrier supporting the planet gear is prevented from rotating during washing by a clutch 20. Therefore, when the rotation of the carrier is blocked during washing, the rotation of the drum shaft 4 is accelerated by the internal gear, planet gear, and sun gear and transmitted to the pulsator shaft 5. Incidentally, during dehydration other than washing or drying, the clutch 20 is disconnected from the carrier, leaving the pulsator 6 in a free state. In FIG. 2, 21 is a clutch for transmitting the power of the motor 13 to the blower fan 12 during drying.

Next, FIG. 3 is a diagram showing the configuration of a reduction gear device and a clutch device, which are the main parts of the present invention. In FIG. 3, the speed reduction device 18 is constructed by combining two sets of planetary gear devices, and the first planetary gear device is connected to the motor shaft 13a of the motor 13.
It consists of a sun gear 22 provided on the inner surface of a cylindrical gear box 23, an internal gear 24 provided on the inner surface of a cylindrical gear box 23, a plurality of planet gears 25, and a carrier 26 that supports the gears 25. The second planetary gear device includes a sun gear 27 integrally provided with a carrier 26, an internal gear 28 provided on the inner surface of the gear box 23, a plurality of planet gears 29, and a carrier 30 supporting the gears 29.

The motor pulley 14 is rotatably attached to the motor shaft +3a, and a clutch device 19 is interposed between it and the motor shaft 13a. This clutch device 19 is a first centrifugal clutch 3
1 and a second centrifugal clutch 32.

The first centrifugal clutch 31 is a movable body 33 that is supported by the motor shaft 18a and rotates together with the shaft +3a to move outward in response to centrifugal force, and pulls the movable body 33 inward against the centrifugal force. Spring 34 and motor pulley 1
The movable body 33 transmits the rotation of the motor shaft +3a to the motor pulley 14 through frictional or uneven engagement with the inner surface of the clutch drum 35. The second centrifugal clutch 32 also includes a clutch drum 36 integrally coupled to the carrier 30;
The movable body 37 is supported by the motor pulley 14 and moves outward in response to centrifugal force, and the spring 38 presses the movable body 37 against the outer surface of the clutch drum 36. Alternatively, the rotation of the motor shaft 13 is transmitted to the motor pulley 14 by engaging the concave and convex portions.

In the above configuration, when the motor 13 is rotated at a low speed by changing the number of poles during washing, the rotation of the motor shaft 18a is decelerated by the speed reduction device 18 and transmitted to the clutch drum 36, which connects the second centrifugal clutch 32 in the power transmission state. The signal is transmitted to the motor pulley 14 via the motor pulley 14. At this time, centrifugal force is acting on the movable body 37, but the spring 38
Since the spring pressure of the second centrifugal clutch 32 is larger, the movable body 37 and the clutch drum 36 of the second centrifugal clutch 32 are in an engaged state and the power transmission state is maintained. On the other hand, the first centrifugal clutch 31
Although centrifugal force is acting on the movable body 33, the spring 3
Since the spring pressure of No. 4 is greater, the movable body 33 does not engage with the clutch drum 35 and is disconnected. The rotational force of the motor 13 is transmitted to the rotating drum 3 via the reduction gear device 18, the second centrifugal clutch 32, the motor pulley 14, the belt 16, the drum pulley 15, and the drum shaft 4, and the drum 3 rotates at a low speed. By appropriately selecting the reduction ratio of the reduction gear device 18, it is possible to rotate at a desired rotation speed, for example, 50 rpm.

Next, when the motor I3 is rotated at high speed during dehydration, the second centrifugal clutch 32 is first disengaged while the rotation speed is rising, and then the first centrifugal clutch 31 enters the power transmission state, and the steady rotation speed is reached. At that point, the rotational force of the motor 13 is transferred to the motor pulley 1 via the first centrifugal clutch 31.
4. That is, when the centrifugal force acting on the movable body 37 becomes greater than the spring pressure of the spring 38, the movable body 37
is separated from the clutch drum 36 and the centrifugal force acting on the other movable body 33 becomes greater than the spring pressure of the spring 34, at which point the movable body 33 engages with the clutch drum 35. The rotating drum 3 includes a first centrifugal clutch 311, a motor pulley 14, a belt 16, a drum pulley 15, and a drum shaft 4.
Rotational force is transmitted through the desired rotational speed, e.g. 800
It rotates at a high speed of about rpm.

(Effects) As described above, according to the present invention, by adopting the ultra-fine conversion method of the motor, the rotation speed of the rotating drum during washing and dehydration can be set to the desired rotation speed, and both operations can be performed. This is a very good idea as it can be executed efficiently.

[Brief explanation of drawings]

1(a) and 1(b) are a front sectional view and a side sectional view showing a schematic configuration of a drum-type washer/dryer according to an embodiment of the present invention, FIG. 2 is an explanatory view showing the power transmission path of the same, and FIG. The figure is a cross-sectional configuration diagram of the main parts of the same. 3: Rotating drum, 13: Motor, 14: Motor pulley,
16: Belt, 18: Reduction device, ]9: Clutch device,
31: First centrifugal clutch, 32: Second centrifugal clutch.

Claims (1)

[Claims] 1. A motor that rotates at high or low speed by changing the number of poles,
A first centrifugal clutch is provided on the motor shaft of the motor and enters a power transmission state when the motor rotates at high speed; a motor pulley which is rotatably provided on the motor shaft of the motor and to which power is transmitted by the first centrifugal clutch when the motor rotates at high speed and by the second centrifugal clutch when the motor rotates at low speed; A drum-type washing machine characterized by comprising a rotating drum connected by a belt.