JP2001017779A - Fully automatic washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of part items to reduce the manufacturing cost by providing a speed reducing mechanism for decelerating the rotation of a motor comprising a gear case for housing reduction gears and an outside input shaft part fitted to the gear case, and partially caulking the circumferential end surface of the gear case to the outside input shaft part. SOLUTION: The drive unit 6 of this fully automatic washing machine is constituted by concentrically arranging a reduction gear mechanism, a claw clutch mechanism 47, and a reversible electric motor 44 in series around the drive rotating shaft of a wash and spin tub 2 and an agitator 4. The reduction gear comprises a drive rotating shaft system 32 of inside and outside double structure supported by bearings 33a, 33b on the inside of halved reduction gear outer cases 32a, 32b having connecting flanges mutually fitted and mounted on a mount base 7 by attaching screws 31. The outside output shaft part of the drive rotating shaft system 34 is integrally connected to a gear case 35 by caulking through a die by use of a press working machine to facilitate its manufacture.

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 conventional fully automatic washing machine, a motor for driving a stirring blade or a washing tub, a clutch for transmitting or not transmitting a rotational force of the motor to the washing tub, and a rotational force of the motor are reduced. Japanese Patent Application Laid-Open No. 7-227494 discloses a washing machine in which a deceleration mechanism for transmitting the pressure to a stirring blade is arranged on the same axis.

[0003] By arranging the motor, clutch, and reduction mechanism on the same axis, the rotational force of the motor can be transmitted to the washing tub without passing through the pulley, so that a large force can be transmitted to the washing tub. .

[0004]

SUMMARY OF THE INVENTION An object of one embodiment of the present invention is to reduce the number of parts and the manufacturing cost.

[0005]

According to one embodiment of the present invention, there is provided a frame, a washing tub provided in the frame, a stirring blade rotatably provided in the washing tub, and a washing tub. In a washing machine having a motor that rotationally drives the stirring blade and a reduction mechanism that reduces the rotation of the motor, the reduction mechanism includes a gear case in which a reduction gear is housed and an outer input shaft portion that is fitted to the gear case. And the fitting between the gear case and the outer input shaft portion is performed by caulking a part of the outer peripheral end surface of the gear case to the outer input shaft portion. One embodiment of the present invention is a frame, a washing tub provided in the frame, a stirring blade rotatably provided in the washing tub, and a motor for rotating the washing tub and the stirring blade. A washing machine having a speed reduction mechanism for reducing the rotation of the motor, the speed reduction mechanism has a gear case in which a reduction gear is housed, and an outer input shaft fitted to the gear case; The mating with the outer input shaft is
When the outer end of the outer input shaft is fitted to the step on the inner surface of the gear case, the outer end of the gear case is formed at an acute angle smaller than the inner circumference of the outer end. A part of the outer peripheral end surface of the gear case is caulked to the gear case by pressurizing the gear case.

[0006] One embodiment of the present invention comprises a frame, a washing tub provided in the frame, a stirring blade rotatably provided in the washing tub, and a rotary drive of the washing tub and the stirring blade. And a washing machine having a speed reduction mechanism for reducing the rotation of the motor, wherein the gear case in which the motor is housed has a convex opening at an upper part thereof, and the inner peripheral surface of the opening has the washing tub. A cylindrical outer output shaft portion for rotationally driving is fitted, and the fitting is performed by applying pressure to the inner circumferential surface of the outer output shaft portion in the opening inner circumferential surface direction. I do.

[0007] Preferably, an outer output shaft for rotationally driving the rotor is installed through a bearing inside the outer output shaft, and a push nut is attached to the inner output shaft so that the inner output shaft does not move upward. It is provided on the output shaft.

[0008] Preferably, the shaft diameter of the inner output shaft portion on the side where the push nut is inserted is reduced.

Preferably, both ends of the inner output shaft are provided with the same serration.

In another embodiment of the present invention, a frame, a washing tub provided in the frame, a stirring blade rotatably provided in the washing tub, and a washing tub and the stirring blade are provided. In a washing machine having a motor that is driven to rotate and a reduction mechanism that reduces the rotation of the motor, the reduction mechanism is fitted to a gear case in which a reduction gear unit including a plurality of reduction gears is housed and the gear case. The gear case is provided with serrations, and the reduction gear unit is provided with serrations for fitting to the serrations.

Preferably, the reduction gear unit is galvanized.

[0012]

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 tub. Also,
It is a washing and dewatering tub that doubles as a dehydration tub. A fluid balancer 3 is provided at the upper edge of the washing tub 2, and a stirring blade 4 is rotatably provided inside the bottom. 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 water supply solenoid valve 21 that connects the water inlet side to a faucet 19 and connects the water outlet side to a 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 tub 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 a synthetic resin having legs 26 attached at four corners is mounted.

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

FIG. 3 shows the internal structure of the driving device 6 in detail.

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

The reduction gear mechanism has a double inner / outer structure driven by ball bearings 33a, 33b inside a split speed reduction mechanism outer case 32a, 32b mounted on the mounting base 7 with the mounting flange together with the coupling flange. 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 spin-drying tub 2 to drive the washing and spin-drying 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 dewatering tub 2 is formed at a tip portion penetrating the outer case 32b, and a serration 35b for engaging with a clutch mechanism is formed on a cylindrical portion extending outside the outer case 32b, and a flange 35c is formed at an inner end. Outer input shaft part 3 formed with
5d and a gear case portion 35e which is located in the middle of the gear case and accommodates the planetary gear reduction mechanism. An annular gear 3 constituting a part of a planetary gear reduction mechanism is provided on the inner periphery of the gear case portion 35e.
5f is fixed.

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 it 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, in the gear case portion 35e, the rotating force which is supported by the carrier 36h fitted to the serration 36b of the inner output shaft portion 36c, meshes with the gears 35f, 36f, turns, and is reduced by the carrier 36h. It is provided with a planetary gear 36i for transmitting.

The ball bearings 40a and 40b are mounted inside the outer input shaft portion 35d in a press-fitted state with respect to the outer 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 described later, the inner input shaft portion 36g supports the rotor of the electric motor in a cantilever state.
As the bearing for supporting the inner input shaft portion 36g, ball bearings 40a and 40b, which are typical of rolling bearings suitable for supporting a large load in the radial direction with small loss, are used. However, roller bearings may be used. .

The drive rotary shaft system 34 is formed by cold pressing a steel plate in which the components of the outer rotary shaft system 35e are electroplated with zinc. By using a steel plate plated with zinc, rust can be prevented, and it can be manufactured at low cost without the need for extra post-treatment.

Next, an embodiment of the driving device 6 using an induction motor as the motor will be described.

(1) Assembling of the drive device Fitting of the inner output shaft 36c and the outer output shaft 35a First, as shown in FIG. 5, the inner output shaft 36c is fitted into the outer output shaft 35a to form a metal bearing. 38a, 38b, watertight with a seal 37, a grip retaining ring 39
The output shaft part which is temporarily held is constituted by. Here, a retaining member (so-called push nut) 39 is attached to prevent the inner output shaft portion 36c from coming off upward. The detachment member 39 is a steel annular member provided with a cut-and-raised portion on the inner peripheral side of the annular member in the direction opposite to the insertion direction of the retaining member, and the cut-and-raised portion prevents the shaft from coming off. Has become. By doing so, it is easy to fit into the shaft, and the shaft 36 can be prevented from coming off in the thrust direction.

Further, a serration 36b is cut below the inner output shaft portion 36c, and the outer diameter of the serration 36b is smaller than the outer diameter of the inner output shaft portion 36c. I have.

The outer output shaft 35a of the inner output shaft 36c
At first, as shown in FIG.
a from above the outer output shaft portion 35a.

A step 38 is provided on the outer peripheral portion of the metal bearing 38a.
a ₁ is formed, and a step 3 is formed on the inner peripheral side of the outer output shaft portion 35a.
5a ₁ are formed, and these steps 38a ₁ , 35
a ₁ causes the metal bearing 38a to move to the outer output shaft portion 35a.
It is supported rotatably in the direction of gravity inside.

Next, the metal bearing 38b is press-fitted from below the outer output shaft portion 35a. Metal bearing 38b is stopped at the outer output shaft inner peripheral stepped portion 35a _2, so as not go upward.

Next, the inner output shaft portion 36a is fitted into the metal bearing 38a from above the outer output shaft portion 35a. Thus, the metal bearing and the internal output shaft or the external output shaft are rotatably supported.

The retaining member 39 is inserted so that the inner peripheral side is convex downward. By doing so, it is possible to prevent the internal output shaft portion 36a from moving upward relative to the metal bearing 38b, and consequently the external output shaft portion 35a.
An attempt to move upward with respect to a can be prevented. That is, when the internal output shaft portion 36a attempts to move upward, the metal bearing 3
8b is moved upward, but the metal bearing 38
b is adapted not be moved upward by a step 35a ₂ of the outer output shaft portion 35a.

Next, the tray 38c and the seal 37 impregnated with oil are inserted and attached from above the outer output shaft 35a.

Both ends of the internal output shaft portion 36c are involute serrations 36a and 36b. The upper serration 36a is connected to the stirring blade 4, and the lower serration 36b is connected to the carrier 36h in the gear case 35e. You.

By making the diameters of the serrations 36a and 36b the same, the same header can be shared during cold forging, so that the productivity can be improved.

Outer output shaft 35a and gear case 35
Coupling with e This will be described with reference to FIGS.

First, the outer output shaft portion 35a assembled as described above is set on the dies 101 and 102 set on a press machine (not shown), and the gear case portion 35e is set thereon. . Dice 1 in this state
03 is set on the die 102. The die 103 is provided with a hole through the punch 104 at substantially the center.

The outer diameter D of the tip of the punch 104 is smaller than the inner diameter d of the outer output shaft portion 35a.
04 is pressed downward, so that the end of the outer output shaft portion 35a on the inner peripheral surface side is expanded so that the fitting portion between the outer output shaft portion 35a and the gear case portion 35e is metal-flow-coupled. I do.

According to this method, the pulling force and the coupling torque in the axial direction of the outer output shaft portion 35a and the gear case 35e can be improved.

Installation of Reduction Gear Unit 35h A method of attaching the reduction gear unit 35h, which is a reduction mechanism, to the serration 36b and the gear case will be described.

The reduction gear unit 35h has three planetary gears.
The built-in reduction gear unit has a reduction ratio of 6
To 7, preferably 6.85. Reduction gear unit 3
A serration 36j is cut on the outer peripheral lower end side of the annular gear 35f on the outer periphery of 5h, and serrations 3 are also formed on the inner periphery of the gear case 35e so as to match the serration 36j.
5 g are provided.

First, as shown in FIG. 9, the reduction gear unit 35h is mounted with the gear cases 35e mounted on the dies 101 and 102, as shown in FIG.
Is mounted in the gear case 35e.

The serration 36b below the inner output shaft portion 36c is inserted into the serration 36h provided on the carrier 36h on the planetary gear output side of the reduction gear unit 35h, and the planetary gear outer serration 36j is connected to the gear case inner serration. Insert into 35g. In this way, the reduction gear unit 35h can be easily converted to the gear case 35.
e.

In this manner, the outer periphery of the reduction gear unit 35h is serrated and connected to the inner periphery of the gear case, and the reduction gear unit 35h and the gear case 35e rotate integrally with each other in the circumferential direction.

Further, each planetary gear 36 is mounted on the carrier 36h.
The center axis of i is rotatably inserted, and the rotational force from the inner input shaft portion 36g is transmitted to each planetary gear 36i to rotate it. The rotational force of the planetary gear 36i is reduced by the reduction gear unit 35.
Although transmitted to the inner periphery of h, the reduction gear unit 35h is serrated and coupled to the gear case 35e so that it does not move relatively, so that the center axis of the planetary gear 36i rotates about the internal output shaft portion 36g. .

Therefore, the carrier 36h into which the planetary gear 36i is inserted also rotates about the inner output shaft portion 36c, and the inner output shaft portion 3 is rotated via the serration coupling portion 36b.
6c is transmitted.

The inner input shaft 36g and the outer input shaft 3
Attachment of 5d A method of attaching the inner input shaft portion 36g and the outer input shaft portion 35d will be described with reference to FIGS.

FIG. 8 is an assembly view of the inner and outer input shafts in which the inner input shaft 36g is rotatably supported by the outer input shaft 35d by ball bearings 40a and 40b.

With the reduction gear unit 35h inserted (in FIG. 7), the inner and outer input shafts shown in FIG. 8 are installed as shown in FIG.

In this state, the die 105 is moved to the die 102
And press it. The lower side of the die 105 has a ring-shaped protrusion 105a, and has a sharp end 105a that becomes sharper toward the lower side.

The sharp end portion 105a is formed in a ring-like projection 105.
a is gently inclined toward the inside, and conversely, steeply inclined toward the outside.

As will be described later, the flange 35c is swaged to the gear case 35e at the gentle slope.

A gear case caulking portion 35i is provided below the sharp end portion 105a. When the sharp end portion 105a is pressed against the gear case caulking portion 35i, the gear case caulking portion 35i is torn so that the gear is rotated as shown in FIG. The inner and outer input shaft portions can be attached to the gear case portion 35e by bending the case caulking portion 35i inward and caulking.

By doing so, it is possible to join by pressing without the need for screwing or the like, and the manufacturing cost can be reduced.

The gear case 35e is made of a steel plate plated with zinc. As a result, rusting can be prevented, and it can be manufactured at low cost without the need for extra post-processing.

As shown in FIG. 3, the electric motor has a motor housing 43 mounted in an insulated state with mounting screws 42 with an insulating member 41 interposed at the lower end surface of the outer case 32b, and has a downward opening. 44 is fitted and fixed so as to be sandwiched between a plurality of cut-out projections 43a and bending claws 43b. Specifically, the stator 44
In order to constitute a reversible rotation induction motor, the stator core 44
a, a 6-pole stator winding 44b is wound therearound, and the outer peripheral surface of the stator core 44a is fitted and fixed in the motor housing 43, and then the motor housing 43 is attached to the outer case 32.
b. The rotor 45 assembled to the stator 44 is fitted to a rotor fitting portion 36d formed on the inner input shaft portion 36g, and is fixed by a lock nut 46 screwed to a set screw 36e.

[0060] 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 4
5a ₂ is a gap 4 for forming an insulating resin layer therebetween.
And dimensioned to generate 5a _3. Outer iron core 45a ₁
Is provided with a slot 45a ₄ for die casting a cage secondary conductor on its outer periphery, it is laminated to a skew condition to suppress torque variation. Rotor fitted wearing parts 36d inner core 45a ₂ is formed at an end portion of the inner input shaft portion 36g at the center
A rotary shaft fitting hole 45a ₅ fitting the, with four straight round hole 45a ₆ therearound, laminated to a straight state.

[0061] rotary shaft fitting hole 45a ₅ is a square shape (can be other polygons), has the function of detent at that portion.

[0062] 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. Thus, it is possible to make the insulation between the inner core 45a ₂ and the outer core 45a _1.

[0063] In addition, the outer core 45a ₁ and the inner core 45a
_The stack thickness of ₂ reduces the dimensional difference by making the number of laminated cores the same, and suppresses the occurrence of burrs during subsequent die casting and 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 45 c _1, the recess 45 c ₃ meshing to engage 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
To form

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.

Next, details of the clutch mechanism will be described with reference to FIGS.

The reference numeral 47 designates the outer rotating shaft system 35 connected to the rotor 45 of the electric motor by meshing engagement, and transmits the rotating force of the rotor 45 to the outer rotating shaft system 35 to rotate or engage the outer rotating shaft system 35. The outer rotation shaft system 35 is unlocked and locked so as not to rotate.

The rotation or stop of the external input shaft portion is performed by a sliding portion including a serration 35b, a slider 47c, a meshing projection 47f, and an adsorber 47e. In this sliding portion, the serration 35b, the slider 47c, and the engagement projection 47f are made of resin, and the adsorber 47e is made of metal. The inside of the slider 47c and the outer periphery of the external input shaft portion 35d are connected by serrations.
Can be moved up and down with respect to the external input shaft 35d. Therefore, it is necessary to provide an opening on the side of the motor housing 43 for passing a joint necessary for driving the clutch up and down by moving the coupling and the like up and down by a driving device outside the motor housing 43. Therefore, it is possible to prevent a decrease in reliability or the like due to water infiltration into the motor housing 43.

For connecting the resin and the metal, holes (not shown) are partially provided at four places (every 90 °) around the adsorber 47e.
When the serration 35b, the adsorber 47e, and the engagement projection 47f are formed of resin, they can be integrally formed by being melted in the hole of the slider 47c. By doing this,
Since the serration 35b is not metal-formed, the sliding portion can be manufactured at low cost. Also, the engagement projection 47
f has a slope in the circumferential direction, so that the force can be reliably transmitted during dehydration.

[0071] mating projection 47f external input shaft portion 35d and the inner input shaft portion 36d when the state of being engaged in the recess 45 c ₃ meshes at the top of the rotor 45 is rotated together with the rotor 45. The recess 45 c ₃ meshes can directly transmit the force of the rotor 45 by providing directly on top of the rotor 45, thereby improving the efficiency. Further, when the meshing projections 47f are not I recess 45 c ₃ and meshing engagement, the rotational force of the rotor 45 is not transmitted to the external input shaft portion 35d, it is transmitted to the inner input shaft portion 36d.

A hole (not shown) is provided in an upper portion of the rotor that meshes with the clutch plate, and the hole is formed in the resin. In this way, the force can be transmitted directly. The operation of the clutch mechanism will be described in detail with reference to FIGS.

When the electromagnetic coil 47a is not energized, the slider 47c is pressed downward by the spring 47d. When the rotor 45 rotates in this state,
The external input shaft 35d and the inner input shaft 36d rotate together, and the stirring blade 4 and the washing and dewatering tub 2 rotate at the same rotation speed.

Next, when the electromagnetic coil is energized, the slider 47 is energized.
The c moves upward by the electromagnetic force against the spring force of the spring 47d and is attracted to the lower part of the electromagnetic core 47b. By doing so, the stirring blade 4 can be rotated without rotating the washing and dewatering tub 2.

Here, when the electromagnetic coil is energized, a DC voltage of 100 V is applied when the slider 47c is first drawn to the lower part of the electromagnetic core 47b (at the time of attraction). In the state where suction is being performed at the lower portion of 47b (at the time of holding), electricity is supplied to 24V. By doing so, it is not necessary to use useless electric power, and it is possible to prevent a rise in the temperature of the electromagnetic core 47b and suppress a decrease in the attraction force.

Next, the lower portion of the electromagnetic core 47b and the adsorber 47e
The details of the joining portion with will be described with reference to FIG. FIG. 15 shows a state in which the convex portion of the adsorber 47e is engaged with the concave portion below the electromagnetic core 47b.

The side wall 47e ₂ (?) Of the convex portion of the adsorber 47e has an inclined portion that is inclined inward as going downward, and the inclination angle is 1 ° to 2 ° with respect to the vertical.

[0078] In addition, has an inclined portion inclined inwardly as also electromagnetic core 47b ₁ bottom recess going downward, the inclination angle has become 1 ° to 2 ° to the vertical.

[0079] In this manner, the convex portion and the electromagnetic core 47b ₁ bottom of recess Kyuchakuko 47e are inclined respectively, both inclined portion can be reliably mate when meshed, the force of the rotor 45 Can be transmitted and the adsorber 47e
When a rotational force is applied, the adsorbent can be prevented from falling off even when 24 V is applied during holding due to the inclination angle.

Therefore, in order to achieve the same effect, the inclination angle is not limited to 1-2 °.

Next, regarding the electromagnetic core portion, FIG. 3 and FIG.
It will be described in detail with reference to FIG.

FIG. 3 is a drive unit when an induction motor is used, and FIG. 13 is an enlarged view of a clutch part.

The electromagnetic core has an electromagnetic coil 47a, an electromagnetic core 47b, and a claw 47f. As shown in FIG. 13, the electromagnetic core portion has a rectangular donut-shaped electromagnetic coil having a rectangular cross section, and is held by a part of an electromagnetic iron core formed of a steel plate. Are bent so as to rise vertically (two places) vertically. Further, a mounting screw 4 above the electromagnetic core portion for connecting to the outer case of the reduction mechanism via the motor housing.
2 has six screw holes evenly formed around it. An insulating member 41 formed of resin (engineer such as PBT or PPS) is formed along an opening above the motor housing 43.

The electromagnetic core is attached to the outer case of the speed reduction mechanism via the insulating member 41. Also, nail 47f
Can penetrate, for example, an insulating member and press-fit into the speed reduction mechanism outer case 32b to reduce transmission of torque to the screw portion.

Next, the details of the motor housing 43 and the cover 48 will be described with reference to FIG.
This will be described with reference to FIG.

The motor housing and the cover 48 are shared so that both the DC brushless motor and the induction motor can be used in a combined state.

This is because, in the induction motor, it is necessary to increase the thickness and the like of the stator 44 as compared with the DC brushless motor having the same rotational force. Parts can be shared, and manufacturing costs can be reduced.

The flange 43e on the outer periphery of the motor housing 43 and the flange 4 on the outer periphery of the lower cover 48
8a is fixed by three screws, and the motor housing 43 and the cover 48 are connected.

An opening (not shown) is provided in the upper central portion of the transmitter housing 43 so that the outer case 32b for the reduction mechanism can be inserted. An insulating member 41 for insulating the outer case from the reduction mechanism is provided in the opening. It is installed integrally with the motor housing 43 by installation outsert molding. The insulating member 41 is made of a resin such as PBT or PPS,
It is mounted so as to cover the inner periphery of the opening X and to be higher than the upper surface of the motor housing 43.

Further, a ventilation hole 43c is formed in the upper part of the motor housing 43 and on the outer periphery of the insulating member 41 in the circumferential direction.
Eight are provided at 5 ° intervals. A ventilation hole 47 opened downward is formed above the outer peripheral side wall of the motor housing 43.
7 to 8 are provided at 45 ° intervals so that b does not overlap with the circumferential position of the ventilation hole 43c. These ventilation holes 43c and 47b function to release heat generated from the motor. Further, the ventilation hole 47b is opened downward to prevent water from entering.

When the stators 44 and 52 of the brushless DC motor or the induction motor are pressed into the motor housing 43, the stator 4
The cut-out protrusion 43a so that the press-fit holes 4 and 52 are not pressed too much.
Are provided in eight places in the circumferential direction.

A folding claw 43b is located at a position corresponding to the position where the cut-out projection 43a is located at the lower portion of the outer periphery of the motor housing 43. After the stators 44 and 52 are inserted into the motor housing, the bending claw 43b is moved inward. The bending supports the stators 44 and 52 to prevent the stator 44 (stator) from falling off due to vibration or the like. However, since the motor housing is shared by the brushless DC motor and the induction motor, in the case of the brushless DC motor, the dimension of the axial direction of the stator core 52a and the dimension of the stator core 44a of the induction motor in the above-described embodiment are changed. In order to compensate for the difference, insert the spacing member 53 or
3b is moved by moving the bending position.

As shown in FIG. 3, the bent claw 43b has a part formed inside the claw in a concave shape. By doing so, the bending claw 43b can be easily bent inward, and no distortion occurs in the stator 44 at the time of bending, so that the corners of the ends of the stators 44 and 52 that come into contact with the bending claw 43b are not damaged. can do. If there is no concave portion inside the nail, the ends of the stators 44 and 52 that come into contact with the bent nail 43b are damaged due to the strain generated when the nail is bent inward, rust occurs, and the dimensions are not stable due to the strain. This is because there are times.

A connector opening (not shown) is provided on the outer periphery of the housing 43 for arranging a conducting wire for energizing the electromagnetic coil.

The outer case 32b of the speed reduction mechanism is fitted into the opening of the insulating member 41 provided on the upper part of the motor housing 43, and is fixed to the motor housing 43 by the mounting screw.

Here, the protrusion 47f is provided on the upper side of the insulating member 41.
Are provided at an interval of 120 °. Further, two concave portions are provided on the lower surface of the speed reduction mechanism outer case 32b at positions corresponding to the two projections. In this way, the outer case 32b of the speed reduction mechanism can be easily positioned when the case 32b is attached to the motor housing 43, and the rotation of the case 32b can be prevented. By doing so, it is possible to prevent displacement during transport and to prevent erroneous assembly.

The inner peripheral surface of the lower end portion of the motor housing 43 has a tapered or stepped sloping shape so that the stators 44 and 52 can be easily inserted, and has a slightly larger inner diameter. By doing so, the stators 44 and 52 can be inserted without being deformed, and it is possible to prevent the stators 44 and 52 from being press-fitted while being bent.

In FIG. 3, the ball bearing 33b is press-fitted into the lower portion of the outer case 32b of the speed reduction mechanism. However, since the outer case 32b of the speed reduction mechanism in this portion is bent upward, it is difficult for water to enter. In other words, the part that becomes a squeeze at the time of press-fitting is below the upper end surface of the ball bearing 33b for press-fitting. Therefore, the ball bearing 33b does not rust.

Further, a hole is provided in the lower part of the flange portion 43e in the circumferential direction, so that it is possible to prevent the accumulation of dew water.

(2) Control Method FIG. 16 is a block diagram showing an electric configuration of the fully automatic washing machine.

The control unit 17 is composed mainly of a microcomputer 17a.
, 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 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.

[0104] FLS17f ₁ is a semiconductor ac switching elements in the forward rotational power feeding control, FLS17f ₂ is a semiconductor ac switching element of the reverse rotation feeding control. With respect to 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 Prepare. 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 fetches 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 incorporated in advance, and 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.

When the start of washing is instructed from the input switch group 14, the washing / dehydrating mode set by the input switch group 14 is confirmed, and the washing / dehydrating process of the set washing / dehydrating 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 to 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. disconnected from engagement recess 45 c ₃ of the rotor 45 adsorbs Kyuchakuko 47e electromagnetic core 47b, 47
By engaging with e ₁ and 47b ₁ , 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 according to the amount of cloth and the quality of the cloth, and water is supplied up to this 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 the washing method in which the stirring blade 4 is rotated forward and backward, 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 so that the stator coil 45 rotates forward and reverse.

The washing method for rotating the washing / dehydrating 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 thereby form the meshing projection 47f of the slider 47c. The rotor 45
₃ is engaged with and engaged with the rotor 45, and the stator coil 44b is urged so as to rotate the rotor 45 of the electric motor in the forward and reverse directions. 35d, the gear case 35e, and the outer output shaft 35a to transmit to the washing and dewatering tub 2. 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.

The washing method in which the washing and spin-drying tub 2 is continuously rotated in one direction is performed by setting the water level to a low level and continuously rotating the electric motor in one direction in the connected state in which the meshing clutch mechanism 47 is meshed. As the stator coil 44
This is realized by energizing b.

The selection of the three types of 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 A 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 dewatering and 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 wash and dewater the water. 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 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 stirring blade 4 and the washing and dewatering tub 2 are kept stationary, the drainage electromagnetic valve 23 is opened, the washing water in the outer tub 5 is drained, 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 The dehydration step is executed. 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.

(3) Embodiment of Brushless DC Motor FIG. 18 shows a driving device 6 using a brushless DC motor.
It is a longitudinal side view which shows embodiment. This embodiment is
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 is shared by the rotor of the induction motor and the rotor of the brushless DC motor. 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 according to this embodiment, the stator 52 is connected to the stator core 52a by the stator winding 52b.
And the stator core 52a is fitted into the motor housing 43 to form the cut-out projection 43a and the bent claw 43.
b so as to be clamped. The spacing member 53 is
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 is compensated for.

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 engagement concave portion 54d into which the engagement protrusion 47f formed in 7d is fitted is resin-molded integrally with the mounting boss 54c on the upper surface of the mounting boss 54c. Mounting boss 54
c 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 the inner core side fastening end has the rotor core 5
4a is exposed, and a metal ring 54e is buried in the clamped end on the outer end side.

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 formed so as to protrude outside the stator winding 52b, and the magnetic pole detecting element 55 is provided so as to oppose the rotation orbit of this protruding portion, so that the rotor 54 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
Since the configuration is such that the drive current flowing through each phase of 52b is controlled,
Detailed description is omitted.

In the fully automatic washing machine using the 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, as described above, the electric 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 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 driving rotary 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. The driving device 6 includes a washing and spin-drying tub 2 and a stirring blade 4 at the upper end of the driving rotary shaft system 34.
The ball bearings 33a and 33b that support the drive rotary shaft system 34 are
It is necessary to install them at as large an interval as possible in the axial direction. Therefore, the ball bearings 33a, 33b
Are arranged in the axial direction corresponding to the axial spacing of the ball bearings 33a, 33b.

From these size distributions, the axial dimension of the electric motor, including the meshing clutch mechanism 47, is about 90 mm. In order to suppress the axial dimension of the induction motor while maintaining the required output characteristics (about 250 W), 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 coils of the stator windings 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 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 sandwiching the stator core 44a is 34 mm in the axial direction from the mounting surface of the motor housing 43.

In the brushless DC motor mounted in place of such an induction motor, the outer dimensions and inner diameter of the 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

In order to selectively incorporate the induction motor or the brushless motor as described above using the production equipment in common, a motor housing 43 in which the stator 44 of the induction motor or the brushless motor 52 is fitted is mounted. 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.

[0140]

According to one embodiment of the present invention, a frame, a washing tub provided in the frame, a stirring blade rotatably provided in the washing tub, and the washing tub and the stirring blade are provided. In a washing machine having a rotation driving motor and a reduction mechanism for reducing the rotation of the motor, the reduction mechanism has a gear case in which a reduction gear is stored and an outer input shaft portion fitted to the gear case, The fitting between the gear case and the outer input shaft portion is performed by caulking a part of an outer peripheral end surface of the gear case to the outer input shaft portion.

According to this structure, the clutch is assembled coaxially, and the rotational force of the motor is transmitted and not transmitted by the electromagnetic force, so that a highly reliable washing machine can be manufactured 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 from the front page (72) Inventor Tamotsu Kamori 1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture Inside the Taga Headquarters, Hitachi, Ltd.Electrical Equipment Division (72) Inventor Hiroshi Osugi Hitachi, Higashi City, Ibaraki Prefecture 1-1-1 Tagacho Hitachi, Ltd.Electrical Equipment Division, Taga Headquarters F-term (reference) 3B155 AA10 BB05 BB19 CA06 CB06 HB02 HB03 HB14 HB19 HB27 HB29 HB33 MA01 MA02 MA06

Claims (8)

[Claims] 1. A frame, a washing tub disposed inside the frame,
In a washing machine having a stirring blade rotatably provided in the washing tub, a motor for driving the washing tub and the stirring blade to rotate, and a reduction mechanism for reducing the rotation of the motor, the reduction gear is a reduction gear. A gear case in which the gear case is accommodated, and an outer input shaft portion fitted to the gear case. A washing machine characterized in that the washing is performed by caulking the shaft. 2. A frame, and a washing tub disposed inside the frame,
In a washing machine having a stirring blade rotatably provided in the washing tub, a motor for driving the washing tub and the stirring blade to rotate, and a reduction mechanism for reducing the rotation of the motor, the reduction gear is a reduction gear. And a gear case in which the gear case is housed and an outer input shaft portion fitted to the gear case. The fitting of the gear case and the outer input shaft portion is performed by a step portion on the inner peripheral surface of the gear case. The outer peripheral surface of the gear case is pressed by pressing an outer peripheral end surface of the gear case with an acute-angled member having a diameter larger than the inner periphery of the outer peripheral end surface and smaller than the outer periphery in a state where the outer peripheral end of the outer input shaft portion is fitted. A washing machine characterized in that a part of an end face is swaged to the gear case. 3. A frame, and a washing tub disposed inside the frame,
In a washing machine having a stirring blade rotatably provided in the washing tub, a motor for rotating the washing tub and the stirring blade, and a speed reduction mechanism for reducing the rotation of the motor, the motor is housed. The upper portion of the gear case has a convex opening, and a cylindrical outer output shaft portion for rotating and driving the washing tub is fitted on the inner peripheral surface of the opening. A washing machine wherein pressure is applied to an inner peripheral surface of an outer output shaft in a direction of the inner peripheral surface of the opening. 4. The washing machine according to claim 3, wherein an outer output shaft for rotating and driving the rotor is installed inside the outer output shaft via a bearing, and the inner output shaft is moved upward. A washing machine wherein a push nut is provided on the inner output shaft so as not to move. 5. The washing machine according to claim 4, wherein a shaft diameter of the inner output shaft portion on a side where the push nut is inserted is reduced. 6. The washing machine according to claim 5, wherein the same serrations are provided at both ends of the inner output shaft. 7. A frame, and a washing tub disposed inside the frame,
A stirring blade rotatably provided in the washing tub, a motor that rotationally drives the washing tub and the stirring blade, and a washing machine having a speed reduction mechanism that reduces the rotation of the motor, wherein the speed reduction mechanism includes a plurality of A gear case accommodating a reduction gear unit composed of a reduction gear; and an outer input shaft portion fitted to the gear case, wherein a serration is provided on an inner peripheral surface of the gear case, and the reduction gear unit is provided. A washing machine provided with a serration for fitting to the serration. 8. The washing machine according to claim 7, wherein said reduction gear unit is galvanized.