JP2000254392A - Drum type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent connector housings of an insulation pedestal mounted on a stator in a washing tub equipped with an outer rotor type motor rotating a rotary tub on the rear part of the washing tub, from being pooled inside. SOLUTION: This washing machine is provided with an insulation pedestal 43 with connector housings 45, 46, so that openings of the connector housings 45, 46 point downward. Thereby, even if there happens dew ondensation on the inside of the connector housings 45, 46, pool formation can be prevented by discharging water through the openings of the connector housings 45, 46 downward, and dew generated in the part other than the insulation pedestal 43 can be also prevented from following in through the openings of the connector housings 45, 46.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type washing machine in which an outer rotor type motor provided at the back of a water tub is used as a rotary drive source for a rotary tub.

[0002]

2. Description of the Related Art Conventionally, in a drum type washing machine,
A water tank is elastically supported inside the outer case, and a rotary tank is rotatably arranged inside the water tank in a horizontal axis state.
Generally, a motor is provided outside and below the water tank, and the rotational power of the motor is transmitted to the rotary tank by a belt transmission mechanism, and the rotary tank is driven to rotate.

However, in this case, since the motor is provided outside and below the water tank, maintenance such as inspection and repair and replacement of the motor is difficult. In addition, in a situation where the washing machine is installed on the waterproof pan and used, when the drain port of the waterproof pan is clogged and the water level of the drain increases, there is a possibility that the motor may be flooded or splashed with water. Therefore, for example, measures such as an abnormal water level detection device and an electric safety device are required, and the cost is increased. On the other hand, in recent years, it has been considered that an outer rotor type motor is provided on the back of the water tank, and the rotary tank is driven to rotate by this.

According to this, since the motor is located at the back of the water tank, maintenance such as inspection and repair and replacement of the motor can be performed from the back of the outer box, thereby facilitating the maintenance. Also, in a situation where the washing machine is installed on the waterproof pan and used, when the drain port of the waterproof pan is clogged or the water level of the drain increases, the motor is not flooded and water is splashed. No countermeasures such as the above-mentioned abnormal water level detecting device and electric safety device for flooding and the like are required, and the cost can be reduced. Furthermore, in this case, since the motor is an outer rotor type, it is flat, so even if this is provided on the back of the water tank,
An increase in the overall depth can be suppressed.

[0005]

In a motor of a washing machine, a lead wire is connected by a connector from the viewpoint of wiring workability. For connection of this connector, a stator of the motor is provided with a connector housing to which a mating connector is coupled, and an insulating base having a conductive member located inside the connector housing. The members are connected.

This structure is the same even when an outer rotor type motor is provided on the back of the water tank. However, in the case where the outer rotor type motor is provided at the back of the water tank, in order to suppress an increase in the overall depth, the insulating base is
The connector housing is provided such that an opening of the connector housing is directed in a radial direction.

However, in the case where the insulating base is simply provided so that the opening of the connector housing is directed radially, the opening of the connector housing may be provided so as to be directed upward. In such a case, water is accumulated inside the connector housing and tracking occurs, resulting in a decrease in insulation.

In particular, since the insulating base is attached to the motor, the insulating base is susceptible to a rise in the temperature of the motor. Also, in parts other than the insulating base,
In a washing machine, water droplets are liable to be generated, and the water droplets may travel along other portions or directly fall on the connector housing portion and enter the inside thereof. As a result, as described above, water accumulates inside the connector housing, and there is a possibility that the insulation may be reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and therefore has as its object the provision of an outer-rotor type motor for rotating a rotary tub at the back of a water tub. An object of the present invention is to provide a drum type washing machine capable of ensuring good insulation without water remaining inside a connector housing of an insulating base.

[0010]

In order to achieve the above object, a drum type washing machine according to the present invention comprises, first, a water tank elastically supported inside an outer box, and an inside of the water tank. A rotary tub arranged rotatably in a substantially horizontal axis state, an outer rotor type motor provided on the back of the water tub and driving the rotary tub to rotate, provided on a stator of the motor,
A connector housing to which a mating connector is coupled; and an insulating base having a conductive member located inside the connector housing, the conductive member being connected to a conductive member of a mating connector inserted from an opening of the connector housing. The connector is characterized in that the insulating base is provided in such a manner that the opening of the connector housing is directed downward.

According to this structure, even if dew forms inside the connector housing, the dew flows out from the mouth of the connector housing. In addition, water droplets generated in portions other than the insulating base can be prevented from flowing in from the mouth of the connector housing.

Second, the drum type washing machine of the present invention is characterized in that a water drain hole is formed in the connector housing of the insulating base. According to this, even if dew forms inside the connector housing, or if water enters from the outside,
They drain out of the connector housing through the drain holes.

Third, the drum-type washing machine of the present invention is characterized in that the insulating base is provided with a waterproof wall surrounding the connector housing. According to this structure, the waterproof wall prevents water droplets generated in portions other than the insulating base from reaching the connector housing portion.

Fourth, the drum type washing machine of the present invention is characterized in that the lead wire having the mating connector is wired so as to pass through a position below a connecting portion between the connector housing of the insulating base and the mating connector. Features. According to this structure, water droplets generated in a portion other than the insulating base travel along the lead wire and reach the connector housing portion, so that the lead wire passing through a position lower than a joint portion between the connector housing and the mating connector is connected. Prevented by the part.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. First, FIG. 3 shows the configuration of the entire drum type washing machine. The outer box 1 serving as an outer shell has a laundry entrance 2 at a substantially central portion of a front portion thereof and a laundry entrance 2 at a substantially central portion of a rear portion thereof. It has a working port 3. A door 4 is provided at the laundry entrance 2 so as to be openable and closable, and a back plate 5 is provided at the work opening 3 so as to be detachable.

A water tank 6 is provided inside the outer box 1 with a support plate 7.
And a plurality of sets of suspensions 8 such as four sets (only two sets are shown). The water tank 6 has a drum shape, and is arranged inside the outer box 1 in a horizontal axis shape in which the axial direction is forward and backward. The water tub 6 has a connection port 9 at a substantially central portion of the front end plate portion, and this is connected to the laundry entrance 2 of the outer box 1 by a bellows 10. On the other hand, a drain port (not shown) is formed at the bottom of the water tank 6, and a drain valve 11 is connected to the drain port.
A drain hose 12 is connected to 1.

A rotary tank 13 is provided inside the water tank 6. The rotary tub 13 has a drum shape smaller in diameter than the water tub 6, functions as a washing tub, functions as a dehydration tub, and further functions as a drying drum. Inside, like the water tank 6, it is rotatably arranged in a horizontal axis shape whose axial direction is forward and backward. In addition, a hole 14 for water passage and ventilation is formed in almost the entire area of the body of the rotary tank 13 (only a part is shown).

FIG. 4 shows the drive unit of the rotary tank 13 in detail. As is apparent from FIG. 4, for example, a rear end plate portion which is a rear wall of a plastic water tank 6 includes:
For example, a reinforcing plate 15 made of a metal such as stainless steel is attached and fixed by a plurality of bolts 16 (only some of which are shown).
Also, a plurality of rotating tank supports 17 also serving as a reinforcing plate made of a metal having a larger thickness are attached to the rear end plate portion, which is the rear wall of the rotating tank 13 made of metal such as stainless steel (FIG. 3). (Only one is shown).

Nearly the center of the rear end plate of the water tank 6 and the reinforcing plate 1
5, the housing insertion holes 19,
20 and a cylindrical bearing housing 2
1 from behind, and then the bearing housing 21
A plurality of mounting portions 21a (1
(Only the book is shown).

On the other hand, a rotary tank shaft 23 is fixed to the center of the rear end plate of the rotary tank 13 with a plurality of bolts 24 (only one part is shown) with the central part of the rotary tank support 17 interposed therebetween. I have. A cap 25 for covering each head of the bolt 24 is attached to the rotary tank shaft 23 with a screw 26 across the center of the rear end plate of the rotary tank 13.

In this structure, a ball bearing 27, which is a bearing, is press-fitted from the rear into a front portion inside the bearing housing 21, and a rotary tank shaft 23 is inserted from inside into the ball bearing 27 from the front. Then, an outer collar 28 and an inner collar 29 are inserted into the bearing housing 21 (between the outer peripheral surface of the rotary tank shaft 23) from the rear, and a ball bearing 30 as a bearing is further press-fitted into the ball housing 27. , 30 held by the bearing housing 21 and the held ball bearings 27, 30
Thereby, the rotary tank shaft 23 is rotatably supported.

The housing insertion hole 19 of the water tank 6 is provided.
Between the bearing housing 21 and the bearing housing 21, a seal 31 for sealing the space between them and the peripheral surface of the rotary tank shaft 23 in a water-tight manner is previously sandwiched.

Now, as described above, the bearing housing 21 is attached, and the motor 32 is attached to the back of the water tank 6 that supports the rotary tank shaft 23. The motor 32 includes a rotor 3
Reference numeral 3 denotes an outer rotor type brushless motor which is positioned outside the stator 34 and rotates.
As shown in FIG. 5, the motor comprises a laminated iron core 35 and a winding 37 provided on the core 35 via a plastic bobbin 36, for example, over the entire circumference thereof. The stator 34, especially the laminated iron core 35, is mounted on the mounting portion 21 a of the bearing housing 21 by a plurality of bolts 38 (only one is shown).

The stator 34 includes a reinforcing plate 15 and a water tank 6.
The reinforcing plate 15, the water tank 6, and the bearing housing 21 are on the water tank 6 side, and therefore, the stator 34 is mounted on the water tank 6 side. Also, the stator 34
The ball bearing 30 on the side opposite to the water tank 6, which is a part of the ball bearings 27 and 30 that supports the rotary tank shaft 23, is located inside the stator 34 in the above state.

On the other hand, the rotor 33 is
9, a yoke 40 fixed to the outer peripheral side thereof, and a magnet 41 fixed to the inner peripheral side of the rotor housing 39 with one pole and one pole. Is fitted to the end of the rotating tank shaft 23 on the side opposite to the rotating tank 13 to engage by serration or the like;
It is mounted so as to rotate integrally with the nut 42 when tightened.

In this mounted state, the rotary tub shaft 23 also serves as the rotor shaft of the motor 32. Therefore, in this case, the rotary tub shaft 23 also serves as the rotor shaft of the motor 32. Further, an insulating base 43 is provided on the stator 34 of the motor 32. The insulating base 43 is specifically mounted at one position of the bobbin 36 on the side opposite to the rotor 33, and is made of, for example, plastic.
A rotation sensor 44, which is a detecting means for detecting the rotation of the sensor, is embedded. The rotation sensor 44 is, for example, composed of a Hall IC, for example.
By detecting each pole of the magnet 41, the rotation of the rotor 33 and, consequently, the rotation of the rotary tub 13 are detected.

As shown in FIG. 1, radially oriented connector housings 45 and 46 are integrally formed on the insulating base 43. Among them, the connector housing 45 is for supplying power to the stator 34, and the connector housing 46 is for taking out a detection signal of the rotation sensor 44. The connectors are to be mated.

FIG. 2 shows these connector housings 45,
46, a connector housing 45 is shown. As shown in FIG.
5 and 46 each have a rectangular cylindrical shape having a mouth portion 47 at a distal end portion, and a holding portion 48 for holding a mating connector is formed on each outer surface portion.

A conductive member 49 is provided inside each of the connector housings 45 and 46.
Then, the conductive member of the mating connector inserted from each opening 47 of the connector housings 45 and 46 is connected thereto. The proximal end of the conductive member 49 is connected to the terminal of the winding 37 on the connector housing 45 side, and the signal extraction unit of the rotation sensor 44 is connected on the connector housing 46 side.

Then, the entire insulating base 43 is mounted such that the opening portions 47 of the connector housings 45 and 46 are directed downward such as diagonally downward in FIG. 1 in the radial direction. ing. In this case, the mouth 47
May be directed downward from the horizontal, and may be directed directly downward (directly below). However, by pointing obliquely downward, there is an advantage that workability of wiring such as connection and disconnection of a mating connector can be improved, and that water splashing from below can hardly enter. Also, connector housing 4
Each of the mouth portions 47 of 5 and 46 protrudes outward from the outer peripheral surface of the rotor 33 which is the outermost peripheral portion of the motor 32.

The washing machine of the present embodiment detects the amount of laundry, the amount of dry laundry, or the amount of imbalance based on the detection result of the rotation sensor 44. Control device 5 for controlling operation based on
0 (see FIG. 3) is provided on the front upper portion of the outer box 1. Further, the washing machine of the present embodiment not only performs washing and dehydration of the laundry, but also performs drying. Although not shown, for example, a blowing device, a dehumidifying device, a heater, and the like for the drying are provided. It has a drying function part.

Next, the operation of the above configuration will be described. When the laundry is washed, dehydrated, or dried, the motor 32 is energized by the windings 37 to rotate the rotor 33.
Is rotated, and the rotation of the rotor 33 is directly transmitted from the rotary tank shaft 23 to the rotary tank 13 so that the rotary tank 13 is rotated.
Is driven to rotate.

As described above, the motor 32 for driving the rotary tub 13 to rotate is provided on the back of the water tub 6 in the case of the above configuration. According to this, maintenance such as inspection and repair and replacement of the motor 32 can be performed from the back of the outer box 1 which can be easily reached by an operator, so that maintenance can be easily performed.
Also, in a situation where the washing machine is installed and used on a waterproof pan (not shown) and the drainage port of the waterproof pan is clogged and the water level of the drain increases, the motor 32 provided on the back of the water tank 6 is also used.
Since there is no flooding and no splashing, no countermeasures such as an abnormal water level detection device and an electrical safety device for the flooding are required, and the cost can be reduced.

Further, in this case, since the motor 32 is of an outer rotor type and is flat, even if it is provided at the back of the water tank 6, an increase in the overall depth can be suppressed.

For connecting the lead wire to the motor 32, the mating connector is connected to the connector housings 45 and 46, and the conductive member of the mating connector inserted from each opening 47 of the connector housings 45 and 46 is connected to the conductive member 49. By doing so, the workability of wiring can be improved.

In this case, the insulating base 43 having the connector housings 45 and 46 is a feature of the provision of the outer rotor type motor 32 at the back of the water tank 6 in order to suppress an increase in the overall depth. Is provided in a state where the opening 47 of the connector housings 45 and 46 is directed in the radial direction, but is provided in a state where the opening 47 is directed downward in the radial direction.

In this embodiment, even if dew is formed inside the connector housings 45 and 46 due to a change in the temperature of the motor 32, the dew drops from the opening 47 of the connector housings 45 and 46 downward. Will be leaked. Further, even if water droplets generated in portions other than the insulating base 43 are transmitted to other portions or directly fall on the connector housings 45 and 46, the mouth portions of the connector housings 45 and 46 pointing downward. There is no inflow from 47. Thus, water does not accumulate inside the connector housings 45 and 46, and good insulation can be ensured.

In the case of the above configuration, the motor 32
Has a structure in which the rotor 33 is directly connected to the rotary tub 13 via the rotary tub shaft 23, and drives the rotary tub 13 to rotate, and does not require a belt transmission mechanism unlike the conventional one. Therefore, the drive device can be simplified accordingly, and cost reduction can be achieved. In addition, the assembly of parts such as the driving pulley, the belt and the driven pulley of the belt transmission mechanism is not required, and simplification of assembly can be achieved. At the same time, individual vibrations due to the components of the belt transmission mechanism are not generated, and further,
Oscillation due to slippage of the belt during high-speed rotation does not occur, so that it is possible to achieve a reduction in operation vibration and noise.

6 to 8 show the second to fourth embodiments of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals and the description will be made. Omitted, and only different parts will be described.

[Second Embodiment] In a second embodiment shown in FIG. 6, connector housings 45 and 46 of an insulating base 43 are provided.
A drain hole 61 is formed in the connector housing 45 (represented by the connector housing 45). In this case, the insulating base 4
3 is mounted in a state in which the opening 47 of the connector housings 45 and 46 is directed in a direction other than downward, that is, upward (directly above), obliquely upward, or a lateral direction (directly upward in the illustrated example). In this state, the drain hole 61 is formed on one side wall of the connector housings 45 and 46 so as to be continuous with the lowermost portion of the connector housings 45 and 46 in this state.

According to this, the connector housing 4
Even if dew forms inside 5, 46
Alternatively, even when the falling water enters, they flow out of the connector housings 45 and 46 through the drain holes 61. Therefore, also in this case, the connector housings 45, 4
Water does not accumulate inside 6, and good insulation can be ensured.

[Third Embodiment] In a third embodiment shown in FIG. 7, connector housings 45 and 4 are mounted on an insulating base 43.
A waterproof wall 71 surrounding 6 (represented by the connector housing 45) is provided. Further, in this case, the insulating base 43 is mounted so that the opening 47 of the connector housings 45 and 46 is directed downward, but may be mounted in a state where it is directed in a direction other than downward.

According to this structure, the water generated in portions other than the insulating base 43 and traveling down the stator 34 and descending to the connector housings 45 and 46 is prevented by the waterproof wall 71, and the water is prevented from flowing. It does not enter the housings 45 and 46. Therefore, also in this case, water does not accumulate inside the connector housings 45 and 46, and good insulation can be ensured.

In this case, the connector housing 4
And the mating connector 72 connected to the connector members 5 and 46 and the conductive members 4 inserted through the respective openings 47 of the connector housings 45 and 46.
9 also shows a conductive member 73 of a mating connector 72 connected to the connector housing 9 and a lead wire 74 having the mating connector 72 at the distal end.
5 and 46 and the mating connector 72 also have a length that surrounds the joining portion, so that water generated and transmitted or descended at portions other than the insulating base 43 reaches the joining portion. I try not to do anything. When the opening portions 47 of the connector housings 45 and 46 are provided so as to be directed in a direction other than the above-described direction, the connector housing 4
5 and 46 may be provided with the above-mentioned drain holes 61.

[Fourth Embodiment] In the fourth embodiment shown in FIG. 8, the lead wire 74 having the mating connector 71 described above is used.
Are wired through a position below the joint between the connector housings 45 and 46 of the insulating base 43 and the mating connector 71. In this case, in detail, the required number of lead wires 74 are bound by the binding body 81, and the lead wires 74 in this state are fixed to the outer box 1 by the holding band 82, and the intermediate portion 74a of the lead wire 74 It passes through a position below the joint portion between the connector housings 45 and 46 of the base 43 and the mating connector 71.

According to this structure, water generated in a portion other than the insulating base 43 reaches the connector housings 45 and 46 along the lead wire 74 including the binding body 81.
The connector housings 45 and 46 and the mating connector 72
Is prevented by the middle portion 74a of the lead wire 74 passing through a position below the connection portion with the connector housing 45, and does not enter the connector housings 45 and 46. Therefore, also in this case, water does not accumulate inside the connector housings 45 and 46, and good insulation can be ensured.

In this case, the insulating base 43 is
Although the opening 47 of the connector housings 45 and 46 is mounted so as to be directed downward, it may be mounted so that it is directed in a direction other than downward. In this case, the connector housings 45 and 46 may be provided with the water drain holes 61 described above.
Further, the above-described waterproof wall 71 may be provided around the connector housings 45 and 46.

In addition, the present invention is not limited to the embodiment described above and shown in the drawings.
In addition, the rotary tank 13 may be supported at an angle of a little more than the horizontal horizontal axis, and it is sufficient that the rotary tank 13 is provided almost in the horizontal axis state. Further, the drying function does not necessarily have to be provided.

[0049]

The present invention is as described above.
The following effects are obtained. According to the drum-type washing machine of the present invention, the outer rotor type motor for rotatingly driving the rotary tub is provided at the back of the water tub, and condensation is formed inside the connector housing of the insulating base provided on the stator. However, since the dew leaks downward from the opening of the connector housing, and water droplets generated in portions other than the insulating base can be prevented from flowing in from the opening of the connector housing, the dew falls inside the connector housing. There is no accumulation of water, and good insulation can be ensured.

According to the drum-type washing machine of the second aspect, even if dew condensation occurs inside the connector housing or water intrudes from the outside, they flow out of the connector housing through the drain holes. Similarly, water does not accumulate inside the connector housing, and good insulation can be ensured. According to the drum-type washing machine of the third aspect, since the waterproof wall prevents water droplets generated in portions other than the insulating base from reaching the connector housing portion, water does not accumulate inside the connector housing. In addition, good insulation can be ensured.

According to the drum-type washing machine of the fourth aspect, water droplets generated in a portion other than the insulating base travel along the lead wire to reach the connector housing portion. Since it is prevented by the part of the lead wire passing through the lower position, water does not accumulate inside the connector housing, so that good insulation can be ensured.

[Brief description of the drawings]

FIG. 1 is a rear view of a stator portion of a motor including a main portion, showing a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part.

FIG. 3 is an overall cutaway side view.

FIG. 4 is an enlarged vertical sectional side view of a motor portion.

FIG. 5 is an exploded perspective view of the motor alone.

FIG. 6 is a view corresponding to FIG. 2 showing a second embodiment of the present invention.

FIG. 7 is a longitudinal sectional rear view of a main part showing a third embodiment of the present invention.

FIG. 8 is a view corresponding to FIG. 1, showing a fourth embodiment of the present invention;

[Explanation of symbols]

1 is an outer box, 6 is a water tank, 13 is a rotating tank, 32 is a motor, 3
3 is a rotor, 34 is a stator, 43 is an insulating base, 45,
46 is a connector housing, 47 is a mouth, 49 is a conductive member, 61 is a drain hole, 71 is a waterproof wall, 72 is a mating connector, 73 is a conductive member, 74 is a lead wire, and 74a is a middle part of the lead wire.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinichiro Kawabata 991, Anata-cho, Seto-shi, Aichi Prefecture Inside the Ashi Plant, Higashishiba Co., Ltd. In-plant (72) Inventor Kiyomi Sasano 991, Anata-cho, Seto-shi, Aichi F-term in Higashishiba Aichi Factory (reference) 3B155 BA13 BA27 CA02 HB09 HC02 MA01 MA02

Claims (4)

[Claims] 1. A water tank elastically supported and disposed inside an outer box; a rotation tank disposed rotatably in a substantially horizontal axis state inside the water tank; and a rotation tank provided on the back of the water tank. An outer rotor type motor for rotating the rotary tub; a connector housing provided on a stator of the motor and coupled with a mating connector; and a conductive member located inside the connector housing. And an insulating base to which the conductive member of the mating connector inserted from the mouth of the connector housing is connected, wherein the insulating base is provided in a state where the mouth of the connector housing is directed downward. Drum type washing machine. 2. A water tank elastically disposed inside the outer box, a rotating tank disposed rotatably in a substantially horizontal axis state inside the water tank, and a rotating tank provided on the back of the water tank. An outer rotor type motor for rotating the rotary tub; a connector housing provided on a stator of the motor and coupled with a mating connector; and a conductive member located inside the connector housing. A water-draining hole formed in the connector housing of the insulating base. 3. A water tank elastically supported inside the outer case, a rotating tank rotatably arranged substantially horizontally on the inside of the water tank, and provided on the back of the water tank. An outer rotor type motor for rotating the rotary tub; a connector housing provided on a stator of the motor and coupled with a mating connector; and a conductive member located inside the connector housing. And an insulating base to which a conductive member of a mating connector is connected, and a waterproof wall surrounding the connector housing is provided on the insulating base. 4. A water tank disposed in the outer case so as to be elastically supported, a rotation tank disposed in the water tank so as to be rotatable substantially in a horizontal axis state, and provided on the back of the water tank. An outer rotor type motor for rotating the rotary tub; a connector housing provided on a stator of the motor and coupled with a mating connector; and a conductive member located inside the connector housing. An insulating base to which the conductive member of the mating connector is connected, and a lead wire having the mating connector, wherein the lead wire is located at a position lower than a coupling portion between the connector housing of the insulating base and the mating connector. A drum-type washing machine characterized by wiring.