JP2000254388A - Full automatic washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a full automatic washer selectively using a driving unit incorporating different motors with a low cost by selectively attaching an induction motor or a brushless DC motor for a rotary shaft projecting into a motor housing mounted on an external case of a reducing gear mechanism. SOLUTION: A driving unit 6 is constituted by vertically arranging a reducing gear mechanism, a claw clutch mechanism 47 and a reversible rotary motor in series, pivoting a driving shaft of a washer and dewatering tub 2 and a stirrer blade 4. The rotary motor is provided with a motor housing 43 with a downward opening mounted on the lower end surface of an external case 32b via an insulating member 41, and in the motor housing 43 the motor is constituted as a reversible rotary induction motor by fitting and fixing a stator 44 in which a stator winding 44b of a six-pole composition is wound around a stator iron core 44a. In the meantime, a brushless DC motor is constituted by fitting and fixing a stator of another composition made by winding a stator winding around a stator core in the motor housing 43.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic washing machine.

[0002]

2. Description of the Related Art In a fully automatic washing machine, a washing and dewatering tub is rotatably installed in an outer tub suspended and supported by an anti-vibration support device in an outer frame, and a stirring blade is provided at the bottom of the washing and dewatering tub. Is rotatably installed, and the washing and dewatering tub and the stirring blade are rotationally driven by a driving device attached to the outside of the bottom of the outer tub.

The driving device transmits the rotation of the electric motor to the stirring blade via a reduction gear mechanism and rotates the stirring blade forward and reverse at a low speed to drive the washing, or to drive the washing and dewatering tub via a clutch mechanism. Then, the washing and dewatering tub is rotated in one direction at a high speed to drive the dehydration.

[0004] Fully automatic washing machines are required to use various washing methods according to the laundry. In general, the washing water amount and the stirring force by the stirring blade are changed in accordance with the amount of cloth, the quality of the cloth, and the degree of dirt. Have to be able to. Recently, a centrifugal washing method in which the washing and spin-drying tub is rotated in one direction for washing is also proposed.

[0005]

SUMMARY OF THE INVENTION A fully automatic washing machine needs to provide a plurality of models having different functions in order to meet different demands of users. However, producing a plurality of models is generally more expensive than producing a single model.

Accordingly, one object of the present invention is to make it possible to produce a plurality of types of fully automatic washing machines relatively cheaply. Specifically, a fully automatic washing machine that uses a drive unit that incorporates a brushless DC motor and a fully automatic washing machine that uses a drive unit that incorporates an induction motor can be manufactured by sharing many parts and checkout equipment. To make it possible.

Further, the drive unit is configured to be unitized by arranging the reduction gear mechanism, the clutch mechanism, and the electric motor coaxially. However, if an induction motor is used as the electric motor, Since high dimensional accuracy is required for the air gap between the stator core and the rotor core, if the rotor shaft is firmly supported from both sides, the axial dimension will increase and the lower part of the outer tank It becomes difficult to install in space.

Another object of the present invention is to make a drive unit for driving the washing / dewatering tub and the stirring blades compact and unitary. Specifically, for example, by supporting the rotor core of the electric motor with high accuracy by an input shaft protruding from the reduction gear mechanism, it is possible to make the drive device incorporating the induction motor into a small unit. is there. Another object of the present invention is to reduce an increase in the axial size of the driving device by devising the configuration of the clutch mechanism.

[0009]

SUMMARY OF THE INVENTION The present invention provides a washing and dewatering tub rotatably provided in an outer tub, a stirring blade rotatably provided inside the bottom of the washing and dewatering tub, A driving device installed outside the bottom of the washing machine to drive the washing and dewatering tub and the stirring blades; and a support device for suspending and supporting the outer tub on a frame, wherein the driving device includes the washing and dewatering tub and the stirring device. In a fully automatic washing machine having a configuration in which a reduction gear mechanism, a clutch mechanism, and a reversible rotary electric motor are arranged in series in the vertical direction about the drive rotation axis of the wing, the reversible rotary electric motor is provided in an outer case of the reduction gear mechanism. An induction motor or a brushless DC motor is selectively mounted on the mounted motor housing and a rotating shaft projecting into the motor housing.

[0010] More specifically, the induction motor and the brushless DC motor are fitted in the motor housing with the stator cores of the stator having the same outer diameter.

In the induction motor and the brushless DC motor, the inner diameter of the stator core of the stator is made equal.

The clutch mechanism may include an annular electromagnetic coil disposed in the motor housing so as to surround an outer input shaft protruding into the motor housing, or may be wound around a stator core in the motor housing. An annular electromagnetic coil disposed in a space surrounded by end coils of the stator winding and disposed so as to surround an outer input shaft portion protruding into the electric motor housing. The slider, which is slidably engaged to apply a spring force to engage with the rotor, is attracted by the electromagnetic force of the electromagnetic coil to release the engagement.

The screw for mounting the motor housing on the outer case of the reduction gear mechanism is located inside the inner diameter of the stator core of the motor so that it can be tightened through the rotor installation space.

The rotating shaft is supported by a rolling bearing into which the outer ring is press-fitted, and the rotor of the electric motor is mounted in a cantilever state.

[0015]

FIG. 1 is a vertical sectional side view schematically showing the basic structure of a fully automatic washing machine according to the present invention. 1 is a frame body including an internal mechanism. 2 is a washing and dewatering tub,
The fluid balancer 3 is provided at the upper edge portion, and the stirring blade 4 is rotatably provided inside the bottom portion. Reference numeral 5 denotes an outer tub that rotatably contains the washing and dewatering tub 2, and a driving device 6 is attached to the outside of the bottom by a steel-made mounting base 7. Suspended by. The internal configuration of the driving device 6 will be described later.

Top cover 9 provided with clothing input opening 9a
Is fitted to the opening edge so as to cover the upper opening of the frame 1, and is attached to the frame 1 together with the front panel 10 and the back panel 11 by mounting screws (not shown).

A power switch 13, an input switch group 14, a display element group 15, and a water level signal corresponding to the water level in the outer tank 5 are generated in a front panel box 12 formed between the upper cover 9 and the front panel 10. Water level sensor 1
6 and a control unit 17 are built in.

A back panel box 18 formed between the upper cover 9 and the back panel 11 has a built-in electromagnetic valve 21 for supplying water to the faucet 19 and connecting the outlet to the water inlet 20. The water inlet 20 is formed so as to discharge water toward the opening of the washing and dewatering tub 2.

A clothing input opening 9a formed in the upper cover 9
Is opened and closed by a lid 22.

A drain port 5a formed at the bottom of the outer tank 5 is connected to a drain hose 24 via a drain solenoid valve 23, and the air trap 5b is connected to the water level sensor 16 via an air tube 25.

At the lower edge of the frame 1, a base 27 made of synthetic resin having legs 26 attached to the four corners is mounted.

FIG. 2 is a vertical sectional side view showing a specific configuration of the fully automatic washing machine, and a part of the configuration is shown in an expanded manner. Since this fully automatic washing machine has basically the same configuration as the fully automatic washing machine shown in FIG. 1, the same reference numerals as those corresponding to the components of the fully automatic washing machine shown in FIG. The same reference numerals are given and duplicate description is omitted.

3 to 15 show the internal structure of the driving device 6 in detail. FIG. 3 is a longitudinal sectional side view showing the entire driving device, and FIG. 4 is a longitudinal sectional side view of the driving rotary shaft system.

5 to 9 show a process of assembling the drive rotary shaft system. FIG. 5 is a longitudinal sectional side view showing a combined state of the outer output shaft portion and the inner output shaft portion, and FIG. FIG. 7 is a longitudinal sectional side view showing an output shaft portion obtained by combining a gear case with an output shaft portion obtained by combining a shaft portion and an inner output shaft portion.
FIG. 8 is a vertical sectional side view showing a combined processing state of a combination in which a gear case is combined with an output shaft portion. FIG. 8 is a vertical sectional side view showing an input shaft portion in which an outer input shaft portion and an inner input shaft portion are combined.
FIG. 4 is a vertical sectional side view showing a finish machining state of the drive rotary shaft system.

FIGS. 10 to 12 show the detailed structure of the rotor 45. FIG. 10A and 10B show a rotor core structure, in which FIG. 10A is a top view, FIG. 10B is a partially longitudinal side view, and FIG. 10C is a bottom view. FIG. 11 shows a structure in which a cage-type secondary conductor and a cooling blade are die-cast on a rotor core.
(A) is a top view, (b) is a partial vertical side view, and (c) is a bottom view. 12A and 12B are external views of the rotor, in which FIG. 12A is a top view, FIG. 12B is a longitudinal side view, and FIG. 12C is a bottom view.

FIGS. 13 to 15 show the detailed structure of the dog clutch mechanism 47. FIG. 13 is a partial longitudinal side view showing a state in which the meshing connection is released, FIG. 14 is a vertical side view showing a state in which the meshing connection is made, and FIG.
FIG. 7 is a cross-sectional view of a meshing engagement portion between a slider for locking an outer rotation shaft system 35 and an electromagnetic core.

The drive unit 6 has a structure in which a reduction gear mechanism, a meshing clutch mechanism, and a reversible rotary motor are arranged concentrically in a vertical direction with the drive rotation axes of the washing and dewatering tub 2 and the stirring blade 4 as axes. It is.

The reduction gear mechanism is driven by a double inner / outer structure by means of ball bearings 33a and 33b inside a split reduction mechanism outer case 32a and 32b attached to the mounting base 7 with the connecting flange together with the mounting flange 31. The shaft system 34 is supported.

As shown in detail in FIG. 4, the drive rotary shaft system 34 includes a hollow outer rotary shaft system 35 and an inner rotary shaft system 36 disposed in the hollow.

The outer rotating shaft system 35 is a rotating shaft system for directly transmitting the rotation of the electric motor to the washing and dewatering tub 2 to drive the washing and dewatering tub 2. The outer rotating shaft system 35 extends outside the outer case 32a and extends outside the outer case 32a. 5
An outer output shaft portion 35a for connecting the washing and spin-drying tub 2 to a tip end penetrating the outer case 32b and a serration 35b for engaging with a clutch mechanism formed on a cylindrical portion extending outside the outer case 32b, and a flange 35c at an inner end. Are formed, and a gear case portion 35e which is located in the middle of the outer input shaft portion 35d and accommodates the planetary gear reduction mechanism. Gear case 35e
An annular gear 35f constituting a part of the planetary gear reduction mechanism is fixed to the inner periphery of the gear.

An inner rotating shaft system 36 provided inside the outer rotating shaft system 35 is a rotating shaft system for reducing the rotation of the electric motor and transmitting the reduced rotation to the stirring blades 4 to drive the stirring blades 4. A seal 37 and metal bearings 38a, 3 are provided in the shaft portion 35a.
8b and a retaining ring (push nut) 39 provided in a watertight and retaining state.
A mounting screw 36a is formed at the outer end portion of the washing / dewatering tub 2 protruding from the tip end of the a and into which the stirring blade 4 is mounted, and protrudes into the gear case portion 35e from the inner end to be coupled with the planetary gear reduction mechanism. An inner output shaft portion 36c having a serration 36b formed in a portion thereof, and an outer portion which is supported by ball bearings 40a and 40b inside the outer input shaft portion 35d, and extends in a cantilever state from the outer end of the outer input shaft portion 35d. An inner input shaft portion 36 in which a motor rotor fitting portion 36d and a set screw 36e are formed at an end portion, and a sun gear 36f is formed at an inner end portion extending into the gear case portion 35e.
g and a carrier 36h fitted in the serration 36b of the inner output shaft portion 36c in the gear case portion 35e.
And a planetary gear 36i that is rotatably engaged with the gears 35f and 36f and transmits the reduced rotational force to the carrier 36h.

The ball bearings 40a and 40b are mounted inside the outer input shaft portion 35d in a press fit state with respect to the inner input shaft portion 35d in order to support the inner input shaft portion 36g serving as the rotor shaft of the motor with high precision. As will be described later, the inner input shaft portion 36g supports the rotor of the induction motor in a cantilever state. Therefore, the bearing supporting the inner input shaft portion 36g has a small loss and a large radial load. Although ball bearings 40a and 40b, which are typical rolling bearings suitable for supporting the roller bearings, are used, roller bearings may be used instead.

The drive rotary shaft system 34 is formed by cold pressing a steel plate on which the components of the outer rotary shaft system 35 are zinc-electroplated. First, as shown in FIG. 5, the inner output shaft portion 36c is fitted into the outer output shaft portion 35a and supported by metal bearings 38a and 38b.
To form an output shaft portion temporarily held by the grip retaining ring 39. Next, as shown in FIG. 6, the gear case 35e is fitted to the inner end of the outer output shaft 35a and temporarily assembled.

As shown in FIG. 7, the temporary assembly having the gear case 35e fitted to the outer output shaft 35a is mounted on a die 101, 102,
The outer output shaft portion 35a and the gear case portion 35e are supported by being surrounded by 103 and pressed by the punch 104 so that the grip retaining ring 39 is pushed in and the end of the outer output shaft portion 35a is expanded. Parts are joined by metal flow.

On the other hand, as shown in FIG. 8, the input shaft is provided with ball bearings 40a, 40b inside the outer input shaft 35d.
And the inner input shaft portion 36g is assembled.

Then, as shown in FIG. 9, the dies 101 and 102 are set in a press working machine by metal flow connecting the fitting portion between the outer output shaft portion 35a and the gear case portion 35e.
A carrier 36h is fitted to a serration 36b projecting into a gear case 35e of the subassembly supported to be surrounded by the carrier 36h.
i, the ring gear 35f is fitted, and the input shaft is turned upside down so as to cover the opening edge of the gear case 35e with the flange 35c. From above, the opening of the gear case 35e is fitted. The input shaft portion is connected to the gear case portion 35e by pushing in a punch 105 having an annular cutting blade 105a which is cut in an end and bent inward so as to embrace the outer peripheral edge of the flange 35c.

In the motor, a plurality of motor housings 43, which are mounted in an insulated state by mounting screws 42 with an insulating member 41 interposed at the lower end surface of the outer case 32b, are opened downward, and a plurality of stators 44 are fitted from the open ends. Is fixed so as to be sandwiched between the notch projection 43a and the bent claw 43b. Specifically, the stator 44 is formed by winding a six-pole stator winding 44b around a stator core 44a so as to constitute a reversible rotary induction motor, and
a is fitted into the motor housing 43 and fixed,
Thereafter, the electric motor housing 43 is connected to the outer case 32b.
Attach to the lower end face of. The rotor 45 assembled to the stator 44 includes a rotor fitting portion 3 formed on the inner input shaft portion 36g.
6d and a set nut 4 screwed into a set screw 36e
Fix with 6.

[0038] The rotor 45, first, as shown in FIG. 10, laminated outer core 45a ₁ and the inner core 45a ₂ as rotor core 45a. Outer core 45a ₁ and inner core 45
a ₂ is a gap 45 for forming an insulating resin layer therebetween.
and dimensioned so as to generate a _3. The outer iron core 45a ₁
Slot 4 for die-casting a cage type secondary conductor on the outer peripheral edge
Comprising a 5a _4, laminated to the skew condition to suppress torque variation. Inner core 45a ₂ includes a rotary shaft fitting hole 45a ₅ fitting the rotor fitting application section 36d is formed at an end portion of the inner input shaft portion 36g in the center, four straight round hole 45a ₆ therearound Prepare and stack in a straight state.

[0039] The rotation shaft fitting hole 4 of the inner core 45a ₂
5a _5, for the accuracy ensuring the detent of the inner core 45a _2, forming about 80% of the lamination thickness into a perfect circular shape, and the remaining approximately 20
% Is formed in a square hole shape. The outer peripheral surface of the inner peripheral surface of the outer core 45a ₁ and the inner core 45a _2, by a combination of the uneven surfaces, so that the detent when bound by injecting an insulating resin layer in the gap 45a ₃ I do. Also,
Lamination thickness of the outer core 45a ₁ and the inner core 45a ₂ is to reduce the dimensional difference by a core of laminated sheets to the same, so as to suppress the burr generation during subsequent die casting or molding.

The rotor core 45a thus configured
As shown in FIG. 11, an aluminum die-cast 45b relative to the outer core 45a _1, cage secondary conductor 45
The b ₁ and the cooling blade 45b _2, 45b ₃ integrally molded.

Next, as shown in FIG. 12, insulating resin is applied to the gap 45a ₃ between the outer core 45a ₁ and the inner core 45a ₂ .
It injected to form a rotating magnet receiving portion 45 c ₂ for rotation detecting sensor stretched on the end surface of the lower to form the insulating resin layer 45 c ₁ that binds both to receive the rotating magnet 4
A permanent magnet 45d is fitted to 5c _2. Further, the insulating resin layer 45c ₁ is uneven portion 45c meshing for meshing the slider of the dog clutch mechanism will be described later to the end surface stretched on the end face of the upper rotor iron core 45a / releasably engaged
Form ₃ .

The rotor 45 constructed in this manner is provided with a motor rotor fitting portion 36d formed on the inner input shaft portion 36g.
And fixed to the motor rotor fitting portion 36d by tightening the lock nut 46. Round hole 45a ₆ of the rotor 45,
It is used to prevent rotation in this tightening operation.

As shown in detail in FIGS. 13 to 15, a part of the meshing clutch mechanism 47 is an outer rotating shaft system 35.
Is coupled to the rotor 45 of the electric motor by meshing engagement to transmit the rotational force of the rotor 45 to the outer rotating shaft system 35 to rotate the shaft, or to release the meshing engagement to rotate the outer rotating shaft system 3.
5 is locked so as not to rotate.

In order to reduce the overall size of the driving device 6 in the axial direction, the meshing clutch mechanism 47 includes an annular electromagnetic iron core 47b including an annular electromagnetic coil 47a inside the motor housing 43 by the mounting screw 42. The outer input shaft 35d is installed in the inner space surrounded by the end coil of the stator winding 44b. Slidably engaged slider 47c of the insulating resin was serration 35b formed on the outer input shaft portion 35d in the axial direction is engaged with the concave-convex portion 45 c ₃ meshing of the rotor 45 by a coil spring 47d The slider 47c is depressed against the pressing force of the coil spring 47d by the electromagnetic force of the electromagnetic coil 47a.
The meshing is released by raising the
Adsorb to 7b and stop.

The slider 47c is provided integrally with the resin molded Kyuchakuko 47e made of iron sucking by the electromagnetic core 47b, the engagement projection 47f engages with fitted into the engagement concave-convex portion 45 c ₃ by resin molding It is formed integrally.

The slider 47e of the slider 47c is connected to the electromagnetic core 4
As shown in detail in FIG. 15, in order to lock the slider 47c and prevent it from rotating when attracted to the magnetic core 4b,
The suction surface of 7b to form a radial engagement grooves 47b ₁ of the plurality of, in Kyuchakuko 47e to form the locking groove 47b radial stopping projections 47e ₁ of the plurality of which fits into the _1. Engaging grooves 47b ₁ is formed to the side wall surface to lock the locking projections 47e ₁ widens at an inclination of 1-2 degrees to the back direction, stopping projections 47
e _1, by abutting sides are formed so as to extend at an inclination of 1-2 degrees in the distal direction, the meshing engagement retaining component force in the direction when engaged occurs on the side wall surface of the locking groove 47b ₁ To do it.

The lower end of the motor housing 43 is
8 is fitted and covered. Then, a rotation detecting element (magnetic sensing element) 49 of the rotation detecting sensor is attached to the cover 48,
The rotation detecting element 49 is connected to the permanent magnet 45 of the rotor 45.
It is installed facing the rotation orbit of d.

In such a drive device 6, the mounting base 7 is mounted on the outside of the bottom of the outer tub 5 by the mounting screw 50. The outside of the driving device 6 is covered with an outer cover 51 attached together with the driving device 6 by the mounting screw 50.

FIG. 16 is a block diagram showing the electrical configuration of this fully automatic washing machine.

The control unit 17 is composed mainly of a microcomputer 17a, and a power supply circuit 17b
, A zero-cross signal generation circuit 17c, and a reset circuit 1
7d, a power supply relay 17e, a feed water solenoid valve 21, a drain solenoid valve 23, and a semiconductor AC switching element (FLS) group or a diode group for controlling power supply to an electromagnetic coil 47a of a clutch mechanism and a stator winding 44b of a motor. , An oscillator circuit 17g for generating a clock signal, and a buzzer 17h.

The power supply circuit 17b generates a low-voltage DC voltage for the control circuit, the zero-cross signal generation circuit 17c generates a reference signal for controlling the semiconductor switching elements, and the reset circuit 17d operates when the microcomputer is turned on. A reset signal for resetting the microcomputer 17a to a predetermined initial state is generated, and the transmission circuit 17g generates a clock signal for operating the microcomputer 17a.

The drive circuit 17f includes a stator winding 4 of the electric motor.
4b, two semiconductor AC switching elements (FLS) 17f ₁ , 17f ₁ for reversible rotation control.
and f _2, comprising a FLS17f ₃ and the diode bridge 17f ₄ for DC braking. FLS17f ₁ is a semiconductor ac switching elements in the forward rotational power feeding control, FLS17f ₂
Is a semiconductor AC switching element for controlling reverse rotation power supply. Regarding the power supply control to the electromagnetic coil 47a,
A phase control FLS17f ₆ for controlling the magnitude of the diode bridge 17f ₅ and the driving current for applying a direct drive current suitable for generating a large electromagnetic force.
The electromagnetic coil drive current is set to a large current in the initial stage of attracting the adsorber 47e because a large electromagnetic force is required, and is controlled so as to reduce the current after the attraction to reduce heat generation.

The microcomputer 17a receives input signals from the power switch 13, the input switch group 14, the water level sensor 16 and the rotation detecting element 49 in accordance with a control processing program installed in advance, and displays the display element group 15 and the power relay. 17e, the drive circuit 17f, and the buzzer 17h.

When the power switch 13 is turned on, the microcomputer 17a of the control unit 17
The power supply relay 17e is turned on to enter a standby state.

Then, when the start of washing is instructed from the input switch group 14, the washing / dewatering mode set by the input switch group 14 is confirmed, and the washing / dehydrating process of the set washing / dewatering mode is started.

FIG. 17 shows a control process executed by the microcomputer 17a in the basic washing / dewatering mode.

Step 1701 The electromagnetic water supply valve 21 is opened to supply water into the outer tank 5 to a predetermined water level. This predetermined water level is a water level suitable for detecting the amount of cloth in the next step.
It monitors and monitors the water level detection signal output from.

Step 1702: The amount of the cloth is detected. This cloth amount detection is performed based on the magnitude of the resistance of the laundry when the stirring blade 4 is rotated, as in the related art. For this purpose, the slider 47c is pulled up against the coil spring 47d by urging the electromagnetic coil 47a of the meshing clutch mechanism 47 to electromagnetically attract the adsorber 47e, and the meshing projection 47f of the slider 47c is moved by the electric motor. It separated from the concave-convex portion 45 c ₃ meshing of the rotor 45 adsorbs Kyuchakuko 47e electromagnetic core 47b, 47e
By engaging with 147b1, the outer rotation shaft system 35 (the washing and dewatering tub 2) is locked so as to suppress the rotation. In this state, the stator coil 44b of the electric motor is energized to rotate the rotor 45, and the planetary gear 36
After decelerating through i, the rotation is transmitted to the inner output shaft portion 36c to rotate the stirring blade 4. Then, the inertial rotation speed when the driving is stopped is detected based on a signal from the rotation detection element 49, and the cloth amount is detected based on the attenuation characteristic. By performing this detection process while changing the water level, it is possible to detect the cloth.

Step 1703 The washing water level is determined in accordance with the amount of cloth and the quality of the cloth, and water is supplied up to the washing water level. Step 1704 A washing step is executed according to the cloth amount and the cloth quality. This washing step is performed by rotating the agitating blade 4 in the normal and reverse directions, and by washing the washing and dewatering tub 2 in the normal and reverse directions.
Can be selectively executed by continuously rotating in one direction.

The washing method in which the stirring blade 4 is rotated forward and backward is as follows.
For example, it is suitable for washing laundry such as cotton underwear and socks with strong agitation. Further, the washing method in which the washing and dewatering tub 2 is rotated in the normal and reverse directions is suitable, for example, for washing large laundry such as sheets and bath towels so as to reduce entanglement and uneven washing. The washing method in which the washing and dewatering tub 2 is continuously rotated in one direction is suitable for washing laundry such as dry mark clothing so as not to lose its shape.

In order to wash the stirring blade 4 in the normal or reverse direction, the electromagnetic coil 47a of the meshing clutch mechanism 47 is urged to lift the slider 47c to disengage the slider 47c from the rotor 45. by engaging the locking projections 47e ₁ in the locking groove 47b ₁ to the washing and dewatering tank 2 and prevented from rotating the outer input shaft portion 35d in a stationary state by adsorbing Kyuchakuko 47e electromagnetic core 47b, rotor The rotation is transmitted to the stirring blade 4 via the inner input shaft portion 36g, the planetary gear 36i, and the inner output shaft portion 36c by urging the stator coil 44 to rotate the rotor 45 forward and backward.

The method of washing by rotating the washing and dewatering tub 2 forward and backward is performed by deenergizing the electromagnetic coil 47a of the meshing clutch mechanism 47 and pushing down the slider 47c by the coil spring 47d to engage the meshing projection 47f of the slider 47c. The rotor 45
By so meshing uneven portion 45 c ₃ fitted to engage in the connected state with the rotor 45, biases the stator coil 44b to rotate forward and backward the rotor 45 of the electric motor,
This rotation is applied to the outer input shaft 35d, the gear case 35e,
This is performed by transmitting to the washing and dewatering tub 2 via the outer output shaft portion 35a. At this time, since the planetary gear mechanism loses the speed reduction function, the stirring blade 4 rotates integrally with the washing and dewatering tub 2 in synchronism.

When the washing and dewatering tub 2 is continuously rotated in one direction, the motor is continuously rotated in one direction when the water level is set low and the meshing clutch mechanism 47 is engaged. As the stator coil 44
This is realized by energizing b.

The selection of these three washing methods is determined by the microcomputer 17a according to the amount of cloth and the type of cloth or the washing mode set by the input switch group 14, and the electromagnetic coil 47a of the meshing clutch mechanism 47 is set. This is performed by controlling the engaged / disengaged state of the meshing clutch mechanism 47. If necessary, a washing method combining these can be used.

Step 1705 The rinsing step is performed. This rinsing step is preferably performed in combination with shower dehydration rinsing and pool rinsing. How to combine, first perform a shower dehydration rinse,
After that, it is advisable to perform a pool rinse.

In the shower dehydration rinsing, the drainage electromagnetic valve 23 is opened to drain the water, the stirring blade 4 and the washing and dewatering tub 2 are rotated at a high speed to perform the dewatering operation, and the water supply electromagnetic valve 21 is opened to perform the washing and dewatering. This is performed by pouring water into the water tank 2.

In this case, in the dehydration in which the washing and dewatering tub 2 is rotated at a high speed, the meshing clutch mechanism 47 deenergizes the electromagnetic coil 47a in the same manner as in the above-described washing method in which the washing and dewatering tub 2 is rotated. This is realized by connecting the slider 47d to the rotor 45 of the electric motor and rotating the electric motor at a high speed in a predetermined direction.

In the reservoir rinsing, the agitating blade 4 and the washing and dewatering tub 2 are kept stationary, the drainage solenoid valve 23 is opened to drain the washing water in the outer tub 5, and the washing and dewatering tub 2 is rotated at a high speed to dehydrate. Then, the drainage electromagnetic valve 23 is closed and the water supply electromagnetic valve 21 is opened to pour water into the washing and dewatering tub 2 to store rinsing water in the outer tub 5 and rotate the stirring blade 4 or the washing and dewatering tub 2. The operation of stirring the laundry is repeated.

Step 1706 A dehydration step is performed. This dehydration step is performed in the same manner as the dehydration in the rinsing step described above.

In each of these steps, the microcomputer 17a displays the set state and the process progress state by controlling the display element group 15, and sounds a buzzer 17h when an abnormality occurs or when washing is completed. To do.

FIG. 18 is a longitudinal sectional side view showing an embodiment of the driving device 6 using a brushless DC motor. In this embodiment, the stator core of the induction motor and the stator core of the brushless DC motor are shared so as to be selectively fitted to one motor housing, and the inner input shaft portion is connected to the rotor of the induction motor and the brushless DC motor. Therefore, the feature of this embodiment with respect to the above-described embodiment lies in the configuration of the electric motor. Therefore, the description of the same components as those in the above-described embodiment will not be repeated.

In the brushless DC motor of this embodiment, the stator 52 is mounted on the stator core 52a by the stator winding 52.
b, and the stator core 52a is fitted into the electric motor housing 43 to form the cut-out projection 43a and the bent claw 4
3b. Spacing member 53
Supplements the difference between the axial dimension of the stator core 52a and the dimension of the stator core 44a of the induction motor in the above-described embodiment.

The rotor 54 includes a rotor core (yoke) 54.
A permanent magnet magnetic pole 54b is attached to the outer circumference of the motor shaft a, and the motor rotor fitting portion 36g on the inner input shaft portion 36g is attached by a mounting boss 54c made of insulating resin integrally formed with the permanent magnet magnetic pole 54b.
Attach to d. Slider 4 of meshing clutch mechanism 47
The mating projections and recesses 54d into which the mating projections 47f formed in 7d are fitted are resin-molded integrally with the mounting boss 54c on the upper surface of the mounting boss 54c. Mounting boss 5
4c is formed in such a size that it can be fitted and attached to the motor rotor fitting portion 36d in the same manner as the rotor 45 of the induction motor, and a rotor core 54a is provided at the inner end side of the clamping end. The metal ring 54e is buried at the outer end side of the clamped end.

The rotor mounting boss 54c can be formed to be short by using a dedicated inner input shaft having a short motor rotor fitting portion.

Further, the permanent magnet magnetic pole 54b is configured to protrude outside the stator winding 52b, and the magnetic pole detecting element 55 is provided so as to face the rotation orbit of the protruding portion, thereby enabling the rotor 54 to protrude. It is configured to detect the rotational position of. The magnetic pole detection element 55 is attached to the cover 48.

As is generally well known, the brushless DC motor detects the relative position of the magnetic pole 54b of the rotor 54 with respect to each phase of the stator winding 52b and flows the current through each phase of the stator winding 52b. Since the driving current is controlled, detailed description is omitted.

In the fully automatic washing machine using this brushless DC motor, the drive circuit 17f includes a rectifier circuit for a DC power supply for the motor and an inverter circuit for PAM controlling the current of each phase of the stator winding 52b. Is provided.

Even if such a driving device 6 is used, a fully automatic washing machine similar to the above-described embodiment can be realized. In addition, since the brushless DC motor can perform various rotation controls, it is possible to perform a more detailed washing step and dewatering step.

By the way, the motor housing 4
In order to selectively incorporate the induction motor or the brushless motor by sharing the third and inner input shaft portions 36g, the dimensions of the outer shell and the fitting portion of the stator and the rotor constituting them must be considered. The outer dimensions for obtaining the same output are generally larger for an induction motor. Therefore, the stator 44 and the rotor 45 of the induction motor will be examined.

The driving device 6 having the configuration in which the planetary reduction gear mechanism, the meshing clutch mechanism, and the electric motor are arranged concentrically in series in the vertical direction with the drive rotation shaft system 34 as the axis center takes into consideration the entire configuration of the fully automatic washing machine. Then, it is necessary to configure the outer tub 5 so that the amount of protrusion downward from the surface of the outer tub 5 attached to the bottom surface is within 160 mm. And this drive device 6
Since the washing and spin-drying tub 2 and the stirring blade 4 are mounted and supported on the upper end of the drive rotary shaft system 34, the ball bearings 33a and 33b supporting the drive rotary shaft system 34 are provided.
Need to be installed at as large an interval as possible in the axial direction. Therefore, the ball bearings 33a, 33
The outer case 32a, 32b in which the 3b is installed has an axial dimension corresponding to the axial interval between the ball bearings 33a, 33b.

From these size distributions, the axial dimension of the motor is 90 mm including the meshing clutch mechanism 47.
About. The induction motor has the required output characteristics (250 W
Degree) while suppressing the axial dimension.
The diameters of the stator 44 and the rotor 45 may be increased.
However, the core 44 of the stator 44 and the rotor 45
If a and 45a are formed by stamping and stacking iron plates, iron cores 44a and 45a having a large diameter become expensive.

Therefore, in this embodiment, the meshing clutch mechanism 47 utilizes the space surrounded by the end coil of the stator winding 44b of the induction motor to utilize the outer input shaft portion 3.
The outer diameter of the stator core 44a is reduced by 160 m by relaxing the axial dimension of the meshing clutch mechanism 47 by devising it so as to surround the 5d.
m, the inner diameter dimension was 98 mm, and the axial dimension was 25 mm.

The inner diameter of the stator core 44a is
When the motor housing 43 is mounted on the lower end surface of the outer case 32b with the mounting screw 42 in a state where the motor housing 43 is fitted to the motor housing 43, the abutment reference surface of the centering jig is provided. It is possible to provide a screwing tool insertion space by being positioned inside the dimension.

Along with this, the position of the cut-out projection 43a provided on the motor housing 43 for holding the stator core 44a is 34 mm in the axial direction from the mounting surface of the motor housing 43.

In a brushless DC motor mounted in place of such an induction motor, the outer dimensions and inner diameter of a stator core 52a constituting the stator 52 are made equal to the stator core 44a of the induction motor, and the axial dimension is reduced. Make it small. Further, the rotor 54 is provided with such a stator core 52a.
Is formed so as to have an outer diameter shape corresponding to the stator 52 configured using

Further, in order to selectively incorporate the induction motor or the brushless motor as described above by sharing the production equipment, in particular, the stator 44 of the induction motor or the motor housing 43 to which the brushless motor 52 is fitted is attached. When mounting the outer case 32b centered on the lower end surface of the outer case 32b with the screws 42, the stator cores 44a, 52
The centering can be performed by abutting the jig on the inner diameter surface of a.
Moreover, since the mounting screw 42 is located inside the inner diameter, the tool can be inserted and tightened in a centered state.

[0087]

According to the present invention, the motor housing for mounting the stator of the motor is configured to be shared by the stator of the induction motor and the stator of the brushless DC motor. Two types of fully automatic washing machines including a washing machine and a drive device using a brushless DC motor can be produced relatively inexpensively.

Further, the drive device of the present invention has a structure in which the inner input shaft for mounting the rotor of the electric motor is mounted inside the outer input shaft with an outer ring press-fit type rolling bearing to support the rotor in a cantilever manner. In addition, the mounting accuracy of the inner input shaft is improved, and a drive device using an induction motor can be realized at low cost.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing an embodiment of a basic configuration of a fully automatic washing machine of the present invention.

FIG. 2 is a longitudinal sectional side view showing a specific configuration of the fully automatic washing machine of the present invention, and a part of the side view is expanded.

FIG. 3 is a longitudinal sectional side view showing the entire driving device in the fully automatic washing machine of the present invention.

FIG. 4 is a vertical sectional side view of a drive rotating shaft system in the drive device for a fully automatic washing machine according to the present invention.

FIG. 5 is a vertical sectional side view showing a combined state of an outer output shaft portion and an inner output shaft portion in the drive device for a fully automatic washing machine of the present invention.

FIG. 6 is a vertical sectional side view showing an output shaft portion in which a gear case is combined with an output shaft portion in which an outer output shaft portion and an inner output shaft portion are combined in the drive device for a fully automatic washing machine of the present invention.

FIG. 7 is a longitudinal sectional side view showing a combined state of a combination in which a gear case is combined with an output shaft portion in the drive device of the fully automatic washing machine of the present invention.

FIG. 8 is a longitudinal sectional side view showing an input shaft unit in which an outer input shaft unit and an inner input shaft unit are combined in the drive device for a fully automatic washing machine of the present invention.

FIG. 9 is a vertical sectional side view showing a finish processing state of a drive rotating shaft system in the drive device of the fully automatic washing machine of the present invention.

FIG. 10 shows a rotor core structure of an electric motor in a drive device of a fully automatic washing machine of the present invention, wherein (a) is a top view,
(B) is a partially longitudinal side view, and (c) is a bottom view.

FIG. 11 shows a structure in which a cage-type secondary conductor and cooling blades are die-cast in a rotor core of an electric motor in a drive device of a fully automatic washing machine of the present invention, wherein (a) is a top view,
(B) is a partially longitudinal side view, and (c) is a bottom view.

FIGS. 12A and 12B are external views of a rotor of an electric motor in a driving device for a fully automatic washing machine according to the present invention, wherein FIG. 12A is a top view and FIG.
Is a longitudinal side view, and (c) is a bottom view.

FIG. 13 is a partial longitudinal side view showing a state in which the meshing coupling of the meshing clutch mechanism in the drive device of the fully automatic washing machine of the present invention is released.

FIG. 14 is a longitudinal sectional side view showing a meshing connection state of a meshing clutch mechanism in the drive device of the fully automatic washing machine of the present invention.

FIG. 15 is a cross-sectional view of a meshing engagement portion between a slider for locking an outer rotating shaft system of a meshing clutch mechanism and a magnetic iron core in the driving device for a fully automatic washing machine of the present invention.

FIG. 16 is a block diagram showing an electric configuration of the fully automatic washing machine of the present invention.

FIG. 17 is a control processing flowchart executed by the microcomputer in a basic washing and dehydrating mode in the fully automatic washing machine of the present invention.

FIG. 18 is a vertical sectional side view of a driving device using a brushless DC motor in the fully automatic washing machine of the present invention.

[Explanation of symbols]

2 ... Washing and dewatering tub, 4 ... Stirring blade, 5 ... Outer tub, 6 ... Driver, 31 ... Mounting base, 32a, 32b ... Deceleration mechanism outer case, 34 ... Drive rotation shaft system, 35 ... Outer rotation shaft system,
36: inner rotating shaft system, 40a, 40b: ball bearing, 42: mounting screw, 43: motor housing, 4
4 ... stator, 44 a ... stator core, 45 ... rotor, 47
... meshing clutch mechanism, 47a ... electromagnetic coil, 47b
... Electromagnetic core, 47c ... Slider, 47d ... Coil spring, 4
7e: adsorber, 47f: meshing projection.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tamotsu Kamori 1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture Inside the Electrification Equipment Division of Hitachi, Ltd. 1-chome F-term in Hitachi, Ltd.Electrical Equipment Division (Reference) 3B155 AA10 BB05 CA05 CA07 CA16 CB06 CB32 CB33 HB02 HB03 HB09 HB14 HB17 HB19 HB28 HB29 MA01 MA02 MA06 MA09

Claims (7)

[Claims] 1. A washing and dewatering tub rotatably provided in an outer tub, a stirring blade rotatably provided inside a bottom of the washing and dewatering tub, and a washing and dehydrating tub installed outside the bottom of the outer tub. A drive device for driving the washing and dewatering tub and the stirring blades, and a support device for suspending and supporting the outer tub on a frame, wherein the drive device
In a fully automatic washing machine having a configuration in which a reduction gear mechanism, a clutch mechanism, and a reversible rotary electric motor are arranged in series in a vertical direction about a drive rotation axis of a washing and spin-drying tub and a stirring blade, the reversible rotary electric motor comprises A fully automatic washing machine comprising an electric motor housing attached to an outer case of a gear mechanism and an induction motor or a brushless DC motor selectively attached to a rotating shaft projecting into the electric motor housing. 2. The fully automatic washing machine according to claim 1, wherein the induction motor and the brushless DC motor are fitted in the motor housing with the stator cores of the stator having the same outer diameter. . 3. The fully automatic washing machine according to claim 2, wherein the induction motor and the brushless DC motor have the same stator core diameter. 4. The clutch mechanism according to claim 1, wherein the clutch mechanism includes an annular electromagnetic coil disposed in the motor housing so as to surround an outer input shaft protruding into the motor housing. The slider, which is slidably engaged with the input shaft portion in the axial direction and has a spring force to engage with the rotor, is attracted by the electromagnetic force of the electromagnetic coil to release the engagement. A fully automatic washing machine characterized in that: 5. The electric motor according to claim 1, wherein the clutch mechanism is located in a space surrounded by end coils of a stator winding wound on a stator core in the electric motor housing. An annular electromagnetic coil arranged so as to surround an outer input shaft portion protruding into the housing, wherein the outer input shaft portion is axially slidably engaged with the outer input shaft portion to apply a spring force to engage with the rotor. A fully automatic washing machine wherein the operated slider is attracted by an electromagnetic force of an electromagnetic coil to release the engagement. 6. The method according to claim 1, wherein the mounting screw of the motor housing to the outer case of the reduction gear mechanism is:
A fully automatic washing machine characterized in that it is located inside an inner diameter of a stator core of an electric motor and can be tightened through a rotor installation space. 7. The fully automatic washing machine according to claim 1, wherein the rotating shaft is supported by a rolling bearing into which an outer ring is press-fitted, and a rotor of the electric motor is mounted in a cantilever state.