JPS6025996B2 - Motor-directly connected washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a washing machine of a type in which a rope azusa wing for washing laundry by washing the laundry and a rotor of a motor for rotating the rope azusa wing are directly connected. It is an object of the present invention to provide a highly reliable drive device that does not require a complicated mechanism using a washing machine, is free from mechanical wear, has low operating noise, and has fewer dimensional restrictions when installed in a washing machine.

Conventionally, in almost all Hinayo-style washing machines, the rotational motion of the electric motor in a fixed direction is converted into the reciprocating motion of the fly wing using a mechanism using gears and clutches, but the production cost is high and They generate noise, cause wear and mechanical failure, and are not always reliable.

The present invention solves the above problems, and its specific configuration will be described in detail based on one embodiment.

FIG. 1 shows a broken sectional view of a washing machine, in which 1 is an outer frame, 2 is an outer tub, and 3 is a washing tub and dewatering tub. Reference numeral 4 denotes a Hinayo wing that holds the laundry in the washing tub, and 5 indicates a clutch mechanism that switches the rotating shafts of the Azusa wing 4 and the washing tub 3 between fixed and rotatable, and which controls the rotation of the motor rotor 6b. Connected to the shaft.

6a, 6a are stators of the motor 6, which are fixed to the outer tank 2.

At least one rotor 6b and at least one stator 6a, 6a' are provided. Magnets 7a and 7b are provided on the rotor 6b, and have different polarities at angles corresponding to the rotation angle of the key azusa blade 4, and are provided in positions facing the reed switch 8 (self-holding type). .

9 is a solenoid that operates the drain valve/clutch mechanism, and is a vibration isolation mechanism suspended from the outer frame 1.
are connected.

FIGS. 2 and 3 show detailed views of the electric motor. The stators 6a and 6a' of the electric motor have windings arranged around an iron core made of arcuate and strip-shaped grooved steel plates, and have multiple fixed poles. is forming.

The opposing end surfaces of the stators 6a and 6a' are in the same D-circular relationship, and there is a magnetic gap between both stators. Rotor 6
b has a cylindrical shape with its green periphery raised up, the side surface of the cylindrical part is made of a non-magnetic conductive material such as aluminum, and there is a narrow slit-shaped opening 6c extending in the axial direction.
have. 7a and 7b indicate magnets fixed at a constant angle on the same circumference of the rotor disk portion.

Figure 4 specifically shows the circuit configuration, where 11 is an alternating current, 12 is a water supply valve, 13 is a timer motor, and 14 is a water supply valve.
1 is a water level switch; 15a and 15b are gate-controlled semiconductor switch elements for controlling the rotational direction of the motor 6;
6 is a capacitor for starting and operating the motor 6; 17 is the gate-controlled semiconductor switching device 15a, 15b;
This shows the current limiting resistor for gate control.

The mode switch 8 is a self-holding type of unipolar dual role type. The contacts T and T5 are cam contacts whose opening and closing are controlled by the timer motor 13, and a program chart showing the opening and closing states thereof is shown in FIG.

To explain the specific operation, when the timer is set and the cam contact T is closed, the timer motor 13 is activated and the contact of the water level switch 14 is closed to the NC side.

Next, the cam contact T3 closes and the water supply valve I2 operates to start water supply, and when the water is supplied to a certain level, the water level switch 1
Contact No. 4 is switched and the NO side is closed. At this time, the water supply is stopped, and then the cam contact closes to start washing. Here, the magnets 7a and 7 are placed in the position shown in FIG.
If there is a reed switch 8 in the circuit diagram of Figure 4,
The contact is closed to the a side. Therefore, the gate-controlled semiconductor switching element 15b becomes conductive, and the winding of the motor 6 is energized. The stator windings are energized by alternating current to effectively create a moving magnetic field that moves along the length of the stator. This moving magnetic field causes eddy currents to swing in the conductive portions of the rotor, which create a countermagnetic field that interacts with the moving magnetic field, producing a torque that moves the rotor 6b counterclockwise. In this way, the rotor 6b rotates counterclockwise,
At the same time, the Junazusa wing 4 rotates. Due to the rotation of the rotor 6b,
When the magnet 7b (for example, S pole) passes near the reed switch 8, the contact of the reed switch 8 is switched to the b side and closed, and in order to maintain this state, a gate-controlled semiconductor switch 15a is suitable. The rotor 6b immediately rotates clockwise and the reed switches 7a and 7
When the magnet 7a passes near the reed switch 8 after rotating through the angle set by b, the contact of the reed switch 8 is closed again to the a side and maintains this state.
The gate-controlled semiconductor switching element 115b is turned on, rotates counterclockwise again from the outside of the motor, performs forward and reverse rotation at a set angle, and repeats the above operations.
When the washing process is completed, the cam contact T3 is opened, and when the cam contact L is closed, the drain valve operates and the water in the tank is drained. When the water drain is completed, the contact of the water level switch 14 is switched to the NC side. When the drainage process is completed, the cam contact T2 is opened.

Next, the washing process and the same operation of the machine are performed in the rinsing process, and water supply, rinsing, and drainage processes are performed. During the dewatering process, the water level switch 14 has a contact on the NC side, cam contacts T2 and T4 close, and the motor 6 rotates in only one direction regardless of the gate-controlled semiconductor switching element.
By the operation of the clutch mechanism 5, the dehydration tank 3 becomes rotatable and dehydration is started.

When the dewatering process is completed, the cam contact T is opened and the washing process is completed.

A series of washing is carried out as described above. In the example,
Although the case where the stators 6a and 6b are a pair has been described, in order to improve the torque and balance the weight of the washing machine,
For example, in the case of two pairs, they may be arranged on both sides symmetrical to the rotation axis, and in the case of three pairs, they may be arranged at positions at an angle of 120 degrees with respect to the rotation axis. The washing machine of the present invention has the following excellent effects.

'1} By making the rotor cylindrical, the stator installation station can be placed near the side of the outer tank, so the torque generated in the rotor is proportional to the product of the distance between the rotating shaft and the rotor. , the torque can be increased.

'21 By making the stator core into an arcuate strip, it is easier to manufacture than a wound core type core, and windings can be easily inserted, making it possible to manufacture a product at a lower price.

By making the '3' rotor cylindrical, a clutch mechanism can be installed at the center of the rotor, and a stator can be installed at the outer periphery of the rotor, allowing effective use of the space at the bottom of the outer tub of the washing machine. , the overall height of the washing machine can be kept low. [4] Since the stator and rotor are installed with a gap in the vertical direction, the generated heat is efficiently dissipated, making it possible to suppress the temperature rise of the motor.

When a plurality of pairs of '5' stators are provided, they are installed at symmetrical positions with respect to the rotation axis to equalize the weight, thereby suppressing vibration during dewatering and at the same time improving torque.

[Brief explanation of drawings]

Fig. 1 is a cutaway cross-sectional view of a washing machine showing an embodiment of the present invention, Fig. 2 is a plan view of the electric motor section, Fig. 3 is a side view of the electric section, Fig. 4 is a circuit configuration diagram, and Fig. 5 is a program chart diagram of a cam contact in a circuit configuration. 3...Washing tub and dewatering tank, 4...Takaazusa Tsubasa, 5...Clutch mechanism, 6...Motor, 6a, 6a'... ···stator. Scales Figure 1 Figure 2 Figure 3 Figure Dimensions of Mountain Mackerel

Claims (1)

[Scope of Claims] 1. At least one pair of stators in which the rotating shafts of the washing tub/dehydration tub and the stirring blade are coaxially provided, and a rotor is connected to the rotating shaft via a clutch mechanism; The rotor has a cylindrical shape with a hollow part made of a non-magnetic conductive material, and is connected to the rotating shaft and includes the clutch mechanism in the hollow part, and the stator has an arcuate shape. It has a rectangular shape and consists of a grooved iron core and a plurality of poles, and the facing surfaces of the two stators and the rotor are in a concentric relationship, and a magnetic gap is formed between the two stators facing the rotor. , a motor-directly coupled washing machine in which the rotor is arranged to pass between the gaps. 2. The motor-directly coupled washing machine according to claim 1, wherein a plurality of pairs of the stators are provided at positions symmetrical to the rotation axis.