JP2000279692A - Dehydration combined washing machine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To simplify a structure for transmitting rotation from a motor to a rotary tank and a stirring body, and to reduce the height of a mechanism for switching between them. SOLUTION: A stirring shaft 27 for rotating a stirring body is provided in a hollow tank shaft 24 for rotating a rotary tank. Stirring shaft 2
7 is connected to the boss 36 of the rotor 31. A serration 42 and a serration 43 are provided on the outer periphery of the lower end of the tank shaft 24 and the outer periphery of the upper end of the boss 36, respectively.
It has a cylindrical shape having an upper inner serration portion 40 and a lower inner serration portion 41 engaged with the inner peripheral portion thereof, and a clutch 37 for connecting and disconnecting the tank shaft 24 and the boss portion 36 is vertically movable. To be provided. An elevating mechanism for moving the clutch 37 up and down and a co-rotation preventing device 39 are provided.
The permanent magnet 62 and the magnetic sensor 63 constitute a clutch position detecting means 61. The outer diameter L1 of the boss portion 36 is configured to be larger than the outer diameter L2 of the tank shaft 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spin-drying washing machine in which a rotation transmitting mechanism from a motor to a rotary tub and a stirring body is improved.

[0002]

Conventionally, in a washing machine for both dehydration and washing, a stirring body is provided at the inner bottom of a rotating tub which is both a washing tub and a dewatering tub, and during a washing operation, the rotation of the motor is transmitted only to the stirring body. During the spin-drying operation, the rotation of the motor is transmitted to both the stirrer and the rotary tub to rotate them integrally at a high speed. Such a rotation transmitting mechanism is disclosed in, for example,
The structure disclosed in Japanese Patent Application Laid-Open No. 52595/1994 and Japanese Utility Model Publication No. 6-42630 is considered.

[0003] Of the former, a coupling gear is used to connect and disconnect a hollow dehydrating shaft for rotating a rotary tub and a washing shaft provided through the dehydrating shaft and rotating a rotating blade. The coupling gear is moved up and down by a rotating gear, a lifting gear, a lifting ring, a lifting guide plate, and the like. However, this structure has a problem that the structure for moving the connecting gear up and down is considerably complicated, and the number of parts is increased.

On the other hand, in the latter, a washing drive shaft for rotating a stirring body via a reduction gear mechanism is passed through a hollow dehydration drive shaft for rotating a rotary tub,
The lower end of the washing drive shaft is connected to the boss of the pulley to which the rotational force of the motor is transmitted, and guide grooves are provided on the outer periphery of the lower end of the dehydration drive shaft and the outer periphery of the upper end of the boss, respectively. A cylindrical cap (clutch) that slides along is provided so as to be vertically moved by a lever.

However, in this configuration, in order to transmit a large torque from the boss to the dehydration drive shaft via the cap, the engagement length of the cap with both the guide grooves of the dehydration drive shaft and the boss must be increased. In addition, the cap itself becomes larger in the vertical direction, and the amount of movement of the cap in the vertical direction also becomes larger, which leads to an increase in the size of the entire mechanism in the height direction. In this case, for example, if the engagement length between the guide groove of the boss and the inner periphery of the cap is small, an excessive force acts on the inner peripheral surface of the cap, causing deformation or breakage of the cap.

The present invention has been made in view of the above circumstances, and an object thereof is to simplify a structure for transmitting rotation from a motor to a rotary tank and a stirring body, and
It is an object of the present invention to provide a dehydrating / washing machine capable of reducing the height of a mechanism for switching between them.

[0007]

According to a first aspect of the present invention, there is provided a dehydrating / washing machine according to the first aspect of the present invention, comprising: a rotary tub provided rotatably in a water tub; a stirring body provided at a bottom portion in the rotary tub; A motor provided at the outer bottom of the water tank, a hollow tank shaft having an upper end connected to the rotating tank and having a lower end extending to the outer bottom of the water tank, and a central part of the rotor of the motor positioned below the tank shaft. A boss part provided with a coupling part on the top,
It is provided so as to penetrate vertically through the hollow portion of the tank shaft,
An agitating shaft having an upper end connected to the agitator and a lower end connected to the boss portion, a sliding guide portion provided to extend vertically in an outer peripheral portion on a lower end side of the tank shaft, and an entire inner peripheral portion. A cylindrical shape having an engaging portion that slides along the sliding guide portion,
The lower end of the tank shaft is vertically movably fitted to the outer periphery, and the lower portion is connected to the connecting portion of the boss portion at the lowered position to connect the tank shaft and the boss portion. And a lifting / lowering means for moving the clutch up and down, and the diameter of the coupling portion of the boss portion is
It is characterized in that it is made larger than the diameter of the tank shaft.

According to this, the cylindrical clutch fitted on the outer periphery of the lower end portion of the tank shaft is moved up and down by the engagement portion of the inner peripheral portion being guided by the sliding guide portion of the tank shaft. When the clutch is lowered to the lowered position by the elevating means, the lower portion of the clutch is connected to the connecting portion of the boss portion and connects the tank shaft and the boss portion of the rotor. Both the shaft and the tank shaft are driven to rotate integrally, and both the stirring body and the rotary tank are driven to rotate integrally. On the other hand, when the clutch is raised to the raised position by the lifting / lowering means, the clutch is disengaged from the boss portion, the rotation of the motor is transmitted only to the stirring shaft, and only the stirring body is rotationally driven. Therefore, it is possible to switch the rotation transmission from the motor to the rotary tank and the agitator with a simple configuration in which the cylindrical clutch is moved up and down.

At this time, since the diameter of the connecting portion of the boss is larger than the diameter of the tank shaft, an excessive force is applied to the clutch even if the connecting size in the vertical direction between the clutch and the boss is small. Without acting, a large torque from the boss can be transmitted to the tank shaft. Accordingly, the vertical dimension of the clutch itself can be reduced, and the vertical movement required for switching the clutch can be reduced.

[0010] In this case, the coupling portion is constituted by internal teeth formed on the inner peripheral surface of a cylindrical portion extending upward from the upper end of the outer peripheral portion of the boss portion. It is also possible to adopt a configuration in which the external teeth provided on the first gear mesh with each other (the invention of claim 2). According to this, the engaging portion formed on the inner peripheral portion of the cylindrical clutch and the outer tooth portion at the lower portion of the outer peripheral portion can be provided so as to vertically wrap, so that the clutch can be made smaller in the vertical direction. However, it is possible to secure a sufficient vertical dimension of the engaging portion and a sufficient vertical connecting dimension between the clutch and the boss portion.

A fitting portion having a tooth portion on the upper surface of the outer peripheral portion of the flange portion is provided at an upper end portion of the clutch, and a tooth portion which meshes with the fitting portion at the raised position of the clutch is provided on the outer bottom of the water tank. (A third aspect of the present invention).
According to this, the fitting portion of the clutch is fitted to the co-rotation preventing portion at the ascending position and fixed to the water tank, so that when the stirring shaft is rotated, the tank shaft and, consequently, the rotating tank may co-rotate. It is surely prevented. In this case, if the co-rotation preventing portion is provided at the outer periphery of the bearing portion that supports the tank shaft (the invention of claim 4), the entire mechanism portion can be co-extruded without increasing the size in the vertical direction. The anti-rotation part can be provided.

The clutch may be partially connected to the connecting portion of the boss portion and partially fitted to the co-rotation preventing portion at a position halfway between the raised position and the lowered position. (The invention of claim 5). According to this, when the state in which the tooth portion of the fitting portion and the tooth portion of the co-rotation prevention portion do not mesh well during movement of the clutch to the raised position, by rotating the rotor and thus the boss portion, By rotating the clutch, it is possible to change the position of the tooth portion of the fitting portion.

Furthermore, an inclined surface which is inclined at an angle of less than 45 degrees with respect to the horizontal direction may be provided at the tip of the teeth of the fitting part and the teeth of the co-rotation preventing part. Item 6)). According to this, even if the clutch is rotated in a state where the teeth of the fitting portion and the teeth of the co-rotation preventing portion are not sufficiently engaged and the inclined surfaces are in contact with each other, the force in the rotational direction of the clutch is obtained. Acts in a direction in which the inclined surfaces are disengaged from each other, so that the teeth of the fitting portion and the teeth of the co-rotation preventing portion can be protected.

According to another aspect of the present invention, the raising and lowering means includes a clutch lever having an operating portion that is engaged with a clutch and moves up and down. When the clutch is lowered, the operating portion of the clutch lever is separated from the clutch. (The invention of claim 7). According to this, when the clutch is being rotated by the motor, the operating portion does not come into contact with the clutch, so that abrasion and noise caused by the sliding can be suppressed.

The boss portion may be provided with a buffer member at a position where the clutch abuts on the clutch at the lowered position of the clutch (the invention of claim 8). Can be reduced, and wear and the like can be reduced.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention (corresponding to claims 1, 3, 4, 5, 6, 7, and 8) will be described below with reference to FIGS. First, FIG.
1 shows a schematic configuration of a main body 1 of a washing machine with dehydration (fully automatic washing machine) according to the present embodiment. Here, a water tank 3 for receiving water during dehydration or the like is provided via an elastic suspension mechanism 4 in the outer box 2 having a substantially rectangular box shape. And the water tank 3
A rotatable tub 5 serving as a washing tub and a dewatering tub in which laundry is stored is rotatably provided inside, and a stirrer (pulsator) for generating a water flow is provided at the bottom of the rotatable tub 5. ) 6 are provided.

As will be described in detail later, the outer bottom of the water tank 3 is provided with an outer-rotor type motor 7 of an inverter drive type, and a rotary for transmitting the rotational driving force of the motor 7 to the rotary tank 5 and the stirring body 6. A transmission mechanism 8 is provided. By the motor 7 and the rotation transmission mechanism 8, in the washing and rinsing processes, the agitator 6 is rotated forward and backward to generate a stirring water flow in the rotary tank 5, and in the dehydration and dehydrating rinsing processes, The rotating tank 5 is rotated at a high speed integrally with the stirring body 6.

A drain 9 for draining water from the rotary tank 5 is provided at the bottom of the water tank 3, and a drain hose 11 is connected to the drain 9 via a drain valve 10. I have. The drain valve 10 is provided with a geared motor 12 (FIG. 1).
0). further,
A drain 13 for draining water from the water tank 3 is provided at the bottom of the water tank 3. The drain 13 is connected to the drain hose 11 (not shown in detail). The drain 9 is provided with an air trap 14, and the pressure in the air trap 14 is guided to a water level sensor via an air tube (not shown).

On the other hand, a balance ring 15 is attached to the upper end of the rotary tub 5 and a dewatering hole 16 for draining water from the rotary tub 5 during dehydration through the space between the balance ring 15. Is provided. A substantially ring-shaped trough cover 17 is provided at the upper end of the water tub 3 as shown only partially, and its opening communicates with the upper opening of the rotary tub 5.

A top cover 18 made of plastic is provided at the upper end of the outer box 2. Although not shown in detail, the top cover 18 has a rectangular frame shape having a substantially circular laundry doorway at the center, and has a thin hollow box shape. A two-fold type lid 19 for opening and closing the laundry entrance is provided on the upper surface of the top cover 18.

Although illustration and detailed description are omitted, a water supply mechanism for supplying water into the rotary tub 5 and a detergent / auxiliary agent supply device are provided on the rear side of the top cover 18. On the front side of the top cover 18, an operation panel is provided on the upper surface, and a control device mainly composed of a microcomputer is provided inside the operation panel. This control device controls each mechanism such as the motor 7 and the water supply mechanism to automatically execute a washing operation including washing, rinsing (dehydration rinsing and rinsing), and dehydration. At this time, the motor 7 is driven at a variable speed and is capable of normal and reverse rotation.

Now, the motor 7 and the rotation transmitting mechanism 8 will be described with reference to FIGS. FIG.
The configuration of the motor 7 and the rotation transmission mechanism 8 is shown. Here, a hollow housing 19 is attached to the outer bottom of the water tank 3. This hollow housing 19
Is formed by joining an upper frame 20 and a lower frame 21 at an outer peripheral side portion, and as shown in FIGS. A portion 20a is formed, and a cylindrical portion 21a that projects downward is formed at the center of the lower frame 21.

In the cylindrical portion 20a and the cylindrical portion 21a, bearings 22 and 23 each composed of a ball bearing are fitted and fixed, respectively, and a hollow (circular tubular) tank shaft 24 is supported by the bearings 22 and 23. Is provided. This tank axis 2
A support cylinder 25 is provided on the outer periphery of the upper end protruding from the
Are fitted and fixed, and the flange portion 2 at the upper end of the support cylinder 25 is fitted.
The rotary tank 5 is fixed to 5a. Thus, the rotation of the tank shaft 24 causes the rotation tank 5 to rotate integrally. Note that a seal member 26 is provided between the inner peripheral surface of the cylindrical portion 20a and the outer peripheral surface of the support cylinder 25.

A stirring shaft 27 is inserted into the hollow portion of the tank shaft 24 so as to penetrate vertically. The stirring shaft 27 is rotatable with respect to the tank shaft 24 by metal bearings 28, 28 provided on the upper and lower portions of the inner periphery of the tank shaft 24 and a bearing 29 provided on the inner periphery of the upper end of the support cylinder 25. It is supported, and its upper end is connected to the stirring body 6. Thus, the stirring member 6 rotates integrally with the rotation of the stirring shaft 27. The lower end of the stirring shaft 27 is connected to the motor 7.

As shown in FIG. 5, the motor 7 is composed of a ring-shaped stator 30 and a thin cylindrical container-shaped rotor 31. The stator 30 is configured by winding a winding 33 around each tooth portion on the outer periphery of a stator core 32, and is attached to a lower surface of the lower frame 21 by being screwed from below. on the other hand,
The rotor 31 is integrally formed by insert molding a rotor magnet 34 disposed on the outer periphery of the stator 30 with a small gap and a rotor yoke 35 disposed on the outer periphery thereof.

A cylindrical boss 36 is fixed to the center of the rotor 31. The lower end of the agitating shaft 27 is inserted into the boss 36 in a serrated state, and attached by, for example, a nut. ing. Therefore, the rotation of the rotor 31 is always transmitted directly to the stirring shaft 27. At this time, as shown in FIGS. 1 and 2, the upper end of the boss portion 36 is located slightly below the lower end of the tank shaft 24, and the outer diameter L1 of the boss portion 36 is It is configured to be larger than the outer diameter dimension L2 of the shaft 24.

On the outer periphery of the lower end of the tank shaft 24, a clutch 37 for connecting and disconnecting the tank shaft 24 and the boss portion 36 is provided. The lifting mechanism 38 serving as a lifting means for moving the clutch 37 up and down and the co-rotation preventing device 39
Is provided.

The clutch 37 is made of a synthetic resin, in this case, a polyacetal resin containing a glass filler.
As shown in FIGS. 2 and 6, the inner peripheral portion has a stepped shape with a small diameter at an upper portion and a large diameter at a lower portion, and has a substantially cylindrical shape as a whole. A circular flange-shaped flange portion 37a is formed integrally with the outer periphery of the upper end portion. An upper inner serration portion 40 which is an engaging portion extending in the vertical direction is formed all around the upper small inner peripheral surface of the clutch 37. A lower inner serration portion 41 extending in the direction is formed. In this case, the upper inner serration portion 40 is configured to have a slightly larger vertical dimension than the lower inner serration portion 41.

On the other hand, as shown in FIGS. 1, 2, and 5, the upper inner serration portion 40 is provided on the outer peripheral portion of the lower end portion (the portion projecting downward from the bearing 23) of the tank shaft 24. A serration portion 42 which is a sliding guide portion extending in the up-down direction is formed corresponding to. On the other hand, the boss portion 36
A serration portion 43 as a coupling portion is also formed on the upper outer peripheral portion corresponding to the lower inner serration portion 41. The clutch 37 is configured such that the upper inner serration portion 40 is always engaged with the serration portion 42,
It is fitted around the outer periphery of the lower end of the tank shaft 24 so as to be vertically movable and to rotate integrally in the circumferential direction.

When the clutch 37 is at the lower position shown in the left half of FIG. 3, the upper inner serration portion 40 of the clutch 37 engages with the serration portion 42 of the tank shaft 24 and the lower inner serration portion. 41 is the boss portion 36
Of the boss portion 36 and thus the stirring shaft 27 and the tank shaft 24 are connected so as to rotate integrally. On the other hand, the clutch 37
Is in the right half of FIG. 1 and the raised position shown in FIG. 3, the upper inner serration portion 40 only engages with the serration portion 42, is separated from the boss portion 36, and only the stirring shaft 27 is rotationally driven. It is supposed to be.

At this time, the boss portion 36 is located at a position where it abuts against the lower end of the clutch 37 at the lowered position of the clutch 37 and has a buffer member 55 made of, for example, an O-ring.
Is provided. A coil spring 44 serving as a clutch urging means is disposed between the clutch 37 and the lower end of the bearing 23 on the outer periphery of the lower end of the tank shaft 24. Is to be urged towards.

As shown in FIG. 6, a fitting such as a worm gear having a plurality of teeth 45a arranged in the circumferential direction is provided on the outer periphery of the upper surface of the flange 37a at the upper end of the clutch 37. A part 45 is formed. At this time, as shown in FIG. 7, the tip portion (upper end portion) of the tooth portion 45a has a mountain shape, and the inclination angle α of the inclined surface on both sides thereof is:
The angle is less than 45 degrees with respect to the horizontal direction.

On the other hand, the co-rotation preventing device 39
For example, it is made of a polyacetal resin containing a glass filler and has a thin cylindrical shape large enough to fit into the outer periphery of the cylindrical portion 21a of the lower frame 21 as shown in FIGS. A flange portion 39a is integrally provided on the outer periphery, and the flange portion 39a is fixed to the bottom surface of the lower frame 21 with a screw at the flange portion 39a. In this case, since the co-rotation prevention device 39 is provided on the outer periphery of the cylindrical portion 21a (bearing portion), the entire rotation transmission mechanism 8 is disposed without increasing the size in the vertical direction. It has become. Further, the co-rotation prevention device 39 includes a pair of support portions 48 for supporting a clutch lever 47 described later,
48 are provided integrally.

At this time, the lower half portion of the inner peripheral surface of the co-rotation preventing device 39 has a tooth meshing with the fitting portion 45 (a valley between the tooth portions 45a) at the raised position of the clutch 37. Part 4
A co-rotation prevention part 46 having 6a is provided. In this case, as shown in FIG. 7, the tip end (lower end) of the tooth portion 46a also has a mountain shape similar to the tooth portion 45a of the fitting portion 45, and the inclination angle α of the inclined surface on both sides is horizontal. The angle is set to less than 45 degrees with respect to the direction.

Thus, when the clutch 37 is at the raised position, the fitting portion 45 is fitted to the co-rotation preventing portion 46, and the clutch 37 is fixed to the lower frame 21 and thus to the water tank 3 and cannot be rotated. . When the clutch 37 is lowered to the lowered position, the fitting of the fitting portion 45 to the co-rotation preventing portion 46 is released, and the clutch 37 is made rotatable. In this embodiment, as shown in FIG. 2, the lower inner serration portion 41 of the clutch 37 is partially connected to the serration portion 43 of the boss portion 36 at a position halfway between the up position and the down position of the clutch 37. And the tooth portion 4 of the fitting portion 45
5a is in a dimensional relationship having a state of being partially fitted to the co-rotation preventing portion 46.

On the other hand, the elevating mechanism 38 comprises the coil spring 44, a clutch lever 47 for moving the clutch 37 up and down, an operation lever 49 for swinging the clutch lever 47, a tension spring 50 and the like. Among them, the clutch lever 47 is made of a synthetic resin such as polypropylene, for example, and has a substantially U-shape in which a pair of arms 47a, 47a extending in parallel are connected on the base end side as shown in FIG. It has a projecting portion 47b projecting rearward from the central portion of the base end portion. This protrusion 47b
Is formed on the upper surface as shown in FIG.

At the tip of each of the arms 47a, there is provided a contact pin 52 which is an operating portion for engaging and pushing up the lower surface of the flange portion 37a of the clutch 37 and protruding inward. . At this time, a pair of contact pins 52
Are adapted to abut two diametrical ends of the flange portion 37a. Further, an inner shaft portion 53 and an outer shaft portion 54, which are supported by the support portion 48, are integrally provided on the base end portion of each arm portion 47a so as to be coaxial.

At this time, a pair of support portions 48, 48 provided integrally with the co-rotation prevention device 39 are shown in FIGS.
As shown in FIG. 9, it has a rectangular cylindrical shape extending downward from the lower surface of the flange portion 39a, and is provided opposite to the co-rotation prevention device 39 so as to sandwich the cylindrical portion left and right at a slightly rearward portion. A tongue-shaped inner wall portion 48a and an outer wall portion 48b for pivotally supporting the inner shaft portion 53 and the outer shaft portion 54 are integrally provided at a lower end portion of the support portion 48. The clutch lever 47 has an intermediate portion (a base end side of each of the arms 47a) supported by each of the support portions 48, and is provided to be swingable in a vertical direction (directions of arrows A and B shown in FIG. 4 and the like). It is.

As shown in FIGS. 3 and 10, the operation lever 49 is pivotally supported in a horizontal direction (directions of arrows C and D) with its intermediate portion pivotally supported by the lower frame 21. As shown in FIG. 9, the lower surface of the distal end portion is formed with a slope portion 58 slidably in contact with the slope portion 51 at the base end of the clutch lever 47. At this time, as shown in FIGS. 3 and 4, the tension spring 50 is connected to the clutch lever 47.
And the clutch lever 47 is urged in the direction of the arrow A by being bridged between the base end side and the co-rotation preventing device 39, so that the slope 51 of the clutch lever 47 is 58 is always in sliding contact.

On the other hand, as shown in FIG. 10, the geared motor 12 is connected to the drain valve 10 via a wire 59 and a connection fitting 60, and as shown in FIG. The drain valve 10 is closed and the drain valve 10 is opened by winding up the wire 59 as shown in FIG. At this time, the base end of the operation lever 49 is connected to the connection fitting 60, so that the operation lever 49 is
The geared motor 12 rotates in the directions of arrows C and D in conjunction with the opening and closing of the drain valve 10.

During the washing and rinsing steps, the operating lever 49 is in the state shown in FIG. 10A (the state rotated from the state shown in FIG. 9 in the direction of arrow C). The base end is pushed down, so that the contact pin 52 at the distal end of the clutch lever 47 pushes the clutch 37 upward against the spring force of the coil spring 44 to be positioned at the raised position.

On the other hand, in the process of dehydration or dehydration rinsing, the operation lever 49 is rotated in the direction of arrow D from the state of FIG. 13A to the state shown in FIG. By relatively sliding the slope 51,
As shown in FIG. 9, FIG. 1 and FIG.
Is pivoted in the direction of arrow A, the contact pin 52 is lowered, and the clutch 37 is lowered to the lowered position by the spring force of the coil spring 44. At this time,
As shown in FIG. 4, when the clutch 37 is in the lowered position,
The contact pin 52 is slightly separated from the flange 37a of the clutch 37 by a small amount to form a gap S.

The clutch 37 is provided with clutch position detecting means 61 for detecting the operating position of the clutch 37. As shown in FIGS. 1 to 3, in this embodiment, the clutch position detecting means 61
For example, the permanent magnet 62 formed in a ring shape from a plastic magnet is
a, and a magnetic sensor 63 is mounted at a height corresponding to that of the co-rotation prevention device 39.

Thus, when the clutch 37 is at the raised position, the outer periphery of the permanent magnet 62 faces the magnetic sensor 63, so that the magnetic sensor 63 can directly detect whether the clutch 37 is at the raised position. It has become. In this case, since the permanent magnet 62 is provided in a ring shape, the permanent magnet 62 surely faces the magnetic sensor 63 if the clutch 37 is at the raised position regardless of the position of the clutch 37 in the rotation direction. It has become.

At this time, although not shown in detail, the wiring of the magnetic sensor 63 is led out through the hollow housing 19 and its signal is input to the control device. The control device determines whether or not the clutch 37 is normally switched based on the input signal from the magnetic sensor 63.
When it is determined that has not been switched to the normal state,
The operation is stopped, and an abnormality is notified by a display on an operation panel or a buzzer sound.

Next, the operation of the above configuration will be described. As described above, during the washing and rinsing steps, FIG.
As shown in the right half of FIG. 3 and in FIG. 3, the clutch 37 is positioned at the raised position by the lifting mechanism 38, and the boss portion 36 and the tank shaft 24 are disconnected. At this time, the permanent magnet 62 provided on the clutch 37 approaches the magnetic sensor 63 provided on the co-rotation prevention device 39, and a detection signal indicating that the clutch 37 is located at the raised position is output from the magnetic sensor 63. Is done.

Here, the control device rotates the motor 7 alternately in the forward and reverse directions on condition that the detection signal from the magnetic sensor 63 is input. The rotation of the rotor 31 is directly transmitted to the stirring shaft 27 and, consequently, the stirrer 6, and the stirrer 6 is rotated forward and reverse to generate a stirring water flow in the rotary tank 5. Also,
In the raised position of the clutch 37, the fitting portion 45 of the clutch 37 meshes with the co-rotation preventing portion 46 and is fixed to the water tub 3 so that it cannot rotate. Co-rotation is prevented.

On the other hand, in the dehydration or dehydration rinsing process, the clutch 37 is lowered to the lowered position by the lifting mechanism 38 as shown in the left half of FIG.
The serration part 41 in the lower part of the clutch 37 is the boss part 36.
The boss 36 and the tank shaft 24 are connected to each other. At this time, the permanent magnet 6
2 is separated downward from the magnetic sensor 63, so that the detection signal from the magnetic sensor 63 is not input to the control device.
Further, the clutch 37 is separated from the co-rotation preventing portion 46, and the fitting is released.

The control device drives the motor 7 to rotate at a high speed in one direction on condition that the detection signal from the magnetic sensor 63 is not input.
The rotation of the rotor 31 is directly transmitted to both the stirring shaft 27 and the tank shaft 24, and the rotating tank 5 is rotated at a high speed integrally with the stirring body 6.

At this time, since the outer diameter L1 of the boss 36 is configured to be larger than the outer diameter L2 of the tank shaft 24, the clutch 37 (the lower inner serration 41) and the boss 36 (the serration 43). Even when the vertical coupling dimension between them is small, it is possible to transmit a large torque from the boss portion 36 to the tank shaft 24 without applying excessive force to the clutch 37. Therefore, the vertical dimension of the clutch 37 itself can be reduced, and the vertical movement amount (stroke) required for switching the clutch 37 can be reduced.

At the above-described lowered position of the clutch 37, the contact pin 52 of the clutch lever 47 is separated from the lower surface of the flange 37a of the clutch 37 as shown in FIG. In this case, the contact pins 52 do not contact the clutch 37, so that wear and noise caused by their sliding can be suppressed. Further, the boss portion 36 is provided with the buffering member 55 which abuts on the clutch 37 at the lowered position of the clutch 37, so that the impact sound to the boss portion 36 when the clutch 37 is switched can be reduced. And abrasion can be reduced.

Thus, in the above configuration, the clutch 3
When the clutch 7 switches from the lowered position to the raised position, the clutch 3
During the ascent of 7, the teeth 45a of the fitting portion 45 and the teeth 46a of the co-rotation preventing portion 46 may come into contact with each other, and a state in which the teeth may not mesh well may occur. However, in the present embodiment, as shown in FIG. 2, at this intermediate position, the lower inner serration portion 41 of the clutch 37 is partially connected to the serration portion 43 of the boss portion 36, and the tooth portion of the fitting portion 45 is formed. 45 a has a state in which it partially fits with the co-rotation preventing portion 46, so that the clutch 37 is rotated by rotating the rotor 31 and thus the boss portion 36 to change the position of the tooth portion 45 a of the fitting portion 45. This makes it possible to correct the normal meshing state.

Further, as described above, the teeth 45 of the fitting portion 45 are formed.
a and the tooth portion 46a of the co-rotation preventing portion 46 abuts, and even if the clutch 37 is rotated in a state where the inclined surface of the tooth portion 45a and the inclined surface of the tooth portion 46a are in contact with each other in a state where they do not mesh well. , As shown in FIG.
It is inclined at an angle of less than 45 degrees with respect to the horizontal direction. For example, at the contact point P of the tooth portion 45a, the rotational force F acting on the clutch 37 is lower than the rotational direction component F '. Is larger (S = F · tan α), so that the tooth portion 45a easily comes off from the tooth portion 46a, and the tooth portion 45a of the fitting portion 45 and the tooth portion 46a of the co-rotation preventing portion 46.
It is possible to prevent breakage and the like in advance.

As described above, according to this embodiment, the cylindrical clutch 37 is provided so as to be vertically movable along the serration portion 42 of the tank shaft 24, and is moved up and down by the elevating mechanism 38 so that the tank shaft 24 and the boss portion 36 are moved. Connection and disconnection from the motor 7, the rotating tank 5 and the stirring body 6
Rotation transmission to the motor can be switched. At this time, the geared motor 12 for driving the drain valve 10 is
Since it is also used as the driving source of 8, it is possible to eliminate the need for a separate driving means and to reduce the cost.

Since the outer diameter L1 of the boss 36 is larger than the outer diameter L2 of the tank shaft 24, even if the coupling dimension between the clutch 37 and the boss 36 in the up-down direction is smaller, Without excessive force acting on 37,
Large torque can be transmitted from the boss portion 36 to the tank shaft 24. Accordingly, the vertical dimension of the clutch 37 itself can be reduced, and the vertical movement amount (stroke) required for switching the clutch 37 can be reduced. In addition, in particular, in the present embodiment, the co-rotation prevention device 39 can be disposed without increasing the size in the vertical direction, and the height of the entire rotation transmission mechanism 8 can be reduced. It is possible to obtain an excellent effect.

In the present embodiment, the fitting portion of the clutch 37 is fixed to the water tank 3 by engaging the engagement portion 45 with the co-rotation prevention portion 46 at the raised position of the clutch 37. Therefore, co-rotation of the tank shaft 24 and thus the rotary tank 5 during rinsing can be reliably prevented. At this time, a state in which the lower inner serration portion 41 is partially connected to the serration portion 43 of the boss portion 36 and the fitting portion 45 is partially fitted to the co-rotation preventing portion 46 at an intermediate position of the clutch 37. Since it is provided, it is possible to correct to a normal meshing state by the rotation of the motor 7,
Since the inclined surfaces of the a and the teeth 46a are inclined at an angle of less than 45 degrees with respect to the horizontal direction, the teeth 45a and the teeth 46a can be protected.

Further, in this embodiment, in particular, the clutch 37
At the lower position, the contact pin 52 of the clutch lever 47 is separated from the clutch 37.
It is possible to prevent the generation and wear of sliding noise between the boss portion 36 and the contact pin 52, and the provision of the buffer member 55 on the boss portion 36 allows the boss portion 36 to be used when the clutch 37 is switched.
It is also possible to obtain an advantage that it is possible to reduce the contact noise and abrasion on the vehicle.

Further, in this embodiment, since the clutch position detecting means 61 is provided, it is possible to reliably detect the switching between the raised position and the lowered position of the clutch 37, and the operation is performed in an abnormal state. Is prevented beforehand, and the reliability of the switching operation of the clutch 37 can be improved. Since the motor 7 is composed of a direct drive type outer rotor type motor, advantages such as reduction in weight, thickness, noise, and transmission loss of rotational force can be obtained.

FIG. 12 shows another embodiment of the present invention.
). This embodiment is different from the above embodiment in the configuration of the clutch 71 and the boss portion 72. That is, the inner peripheral surface has a cylindrical shape with a uniform inner diameter, and the inner peripheral portion has an inner serration portion 73 as an engaging portion that slides along the serration portion 42 of the tank shaft 24 over the entire vertical direction.
Are formed. An outer serration 74 is formed in the lower half of the outer periphery of the clutch 71.

On the other hand, the boss portion 72 is integrally provided with a cylindrical portion 72a which rises upward from the upper end of the outer peripheral portion, and the inner peripheral surface of the cylindrical portion 72a is provided with the clutch 7a.
A serration portion 75 is formed as an internal tooth portion (coupling portion) with which the outer serration portion 74 meshes. Again,
The diameter L3 of the connection portion of the boss portion 72, that is, the diameter L3 of the serration 75 is determined by the outer diameter L of the tank shaft 24 (the serration 42).
It is configured to be larger than 2.

In such a configuration, the inner serration portion 73 of the inner peripheral portion of the clutch 71 always engages with the serration portion 42 of the tank shaft 24, and the clutch 71 is slidable vertically with respect to the tank shaft 24 and integrated therewith. It is provided to rotate. When the clutch 37 is at the lower position shown in the left half of the figure, the outer serration 74 engages with the serration 75 of the boss 72, thereby integrating the boss 72 and the stirring shaft 27 with the tank shaft 24. It connects so that it may rotate. On the other hand, when the clutch 71 is in the raised position shown in the right half of the figure, the boss 36
, So that only the stirring shaft 27 is rotationally driven.

According to this, similarly to the above embodiment, the rotation transmission from the motor 7 to the rotary tank 5 and the stirring body 6 can be switched with a simple configuration, and no excessive force acts on the clutch 71. Thus, a large torque can be transmitted from the boss portion 72 to the tank shaft 24. At this time, the clutch 7
The inner serration portion 73 formed on the inner peripheral portion of the clutch 71 and the outer serration portion 74 formed on the outer peripheral portion can be provided so as to wrap in the vertical direction.
The inner serration 73
Of the outer serration 74 is sufficiently secured in the vertical direction with respect to the serration 42.
It is possible to ensure a sufficient vertical engagement length with the second serration portion 75. As a result, the height of the clutch 71 can be further reduced.

The present invention is not limited to the above embodiments. For example, an optical sensor or a micro switch may be used as the clutch position detecting means. Various modifications are possible, and a drive source for raising and lowering the clutch may be separately provided.

[0064]

As is apparent from the above description, according to the washing machine with dehydration of the present invention, the cylindrical clutch is provided so as to be vertically movable along the sliding guide portion of the tub shaft, and the clutch is provided. The tank shaft and the boss are moved up and down by the elevating means to connect and disconnect the tank shaft and the boss, and the diameter of the connecting portion of the boss is configured to be larger than the diameter of the tank shaft. In addition, it is possible to simplify the structure for transmitting the rotation to the agitator, and it is possible to reduce the height of the mechanism for switching between them.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a vertical cross-sectional view of a rotation transmitting mechanism portion simultaneously showing a lowered position (left side) and a raised position (right side) of a clutch across a center line.

FIG. 2 is a vertical cross-sectional view of a rotation transmitting mechanism at an intermediate position of a clutch.

FIG. 3 is a longitudinal sectional view of a motor and a rotation transmission mechanism.

FIG. 4 is a side view showing a relationship with a clutch lever at a clutch lowered position.

FIG. 5 is an exploded perspective view of a motor and a clutch part.

FIG. 6 is a longitudinal sectional view of a clutch.

FIG. 7 is an enlarged view showing one tooth portion of the fitting portion.

FIG. 8 is a perspective view of a state in which the clutch lever is turned upside down.

FIG. 9 is a longitudinal rear view showing the relationship between the slope of the clutch lever and the slope of the operation lever during the spin-drying operation.

FIG. 10 shows the relationship between a geared motor and an operation lever, and is a bottom view of a drain valve in a closed state (a) and an open state (b).

FIG. 11 is a longitudinal sectional side view schematically showing the entire configuration of the washing machine.

FIG. 12 shows another embodiment of the present invention, in which the clutch is lowered (left) and raised (right) with respect to a center line.
Enlarged vertical cross-sectional view of the clutch part simultaneously showing

[Explanation of symbols]

In the drawings, 1 is a main body, 3 is a water tank, 5 is a rotary tank, 6 is a stirring body, 7 is a motor, 8 is a rotation transmission mechanism, 10 is a drain valve, 1
2 is a geared motor, 19 is a hollow housing, 21 is a lower frame, 22 and 23 are bearings, 24 is a tank shaft, 27 is a stirring shaft, 30 is a stator, 31 is a rotor, 36 and 72 are bosses, and 37 and 71 are clutches. , 37a are flange portions, 38
Is an elevating mechanism, 39 is a co-rotation prevention device, 40 is an upper inner serration (engaging portion), 41 is a lower inner serration,
42 is a serration part (sliding guide part), 43 is a serration part (coupling part), 44 is a coil spring, 45 is a fitting part,
45a is a tooth portion, 46 is a co-rotation prevention portion, 46a is a tooth portion, 4
7 is a clutch lever, 48 is a support portion, 49 is an operation lever, 50 is a tension spring, 51 is a slope portion, 52 is a contact pin (operating portion), 55 is a buffer member, 58 is a slope portion, and 61 is a clutch position detection. Means, 62 is a permanent magnet, 63 is a magnetic sensor, 72a is a cylindrical portion, 73 is an internal serration (engaging portion), 74 is an external serration (external teeth), and 75 is a serration (internal teeth). .

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroyuki Noguchi 991 Anada-cho, Seto-shi, Aichi Prefecture Toshiba A-V E. Co., Ltd. Nagoya Office (72) Inventor Tadaaki Koketsu 991, Anata-cho, Seto-shi, Aichi Co., Ltd. F-term in Toshiba Aichi Factory (reference) 3B155 AA01 AA03 AA06 BB05 CA06 CB06 DB14 HB02 HB03 HB09 HB15 HB19 MA01 MA02

Claims (8)

[Claims] A rotating tank provided rotatably in a water tank; a stirring member provided at a bottom of the rotating tank; a motor provided at an outer bottom of the water tank; A hollow tank shaft that is connected and has a lower end extending to the outer bottom of the water tank, a boss provided at a lower portion of the tank shaft at a center of a rotor of the motor, and having a coupling portion at an upper part; It is provided so as to penetrate vertically inside the hollow part of the shaft,
An agitating shaft having an upper end connected to the agitator and a lower end connected to the boss portion; a sliding guide portion extending vertically extending from an outer peripheral portion on a lower end side of the tank shaft; Into a cylindrical shape having an engaging portion that slides along the sliding guide portion, and is inserted into the outer periphery of a lower end portion of the tank shaft so as to be movable up and down, and a lower portion at the lower position is a coupling portion of the boss portion. A clutch coupled to the tank shaft and the boss portion, and disengaged from the boss portion at an ascending position; and a lifting means for moving the clutch up and down. A washing machine with a combination of dehydration, wherein a diameter is larger than a diameter of the tub shaft. 2. The coupling portion includes an internal tooth portion formed on an inner peripheral surface of a cylindrical portion extending upward from an upper end of an outer peripheral portion of the boss portion,
2. The washing machine according to claim 1, wherein an external tooth portion provided at a lower portion of an outer peripheral portion of the clutch engages with the internal tooth portion. 3. An upper end portion of the clutch is provided with a fitting portion having a tooth portion on an upper surface of an outer peripheral portion of the flange portion, and an outer bottom portion of the water tank is provided with the fitting portion at a rising position of the clutch. 3. The washing machine according to claim 1, further comprising a co-rotation preventing portion having a meshing tooth portion for preventing rotation of the clutch. 4. The washing machine according to claim 3, wherein the co-rotation preventing portion is provided at an outer periphery of a bearing portion that supports the tub shaft. 5. The clutch has a state in which the clutch is partially coupled to the coupling portion of the boss portion and partially engaged with the co-rotation preventing portion at a position halfway between the raised position and the lowered position. The washing machine according to claim 3 or 4, wherein the washing machine is used. 6. A tip portion of the tooth portion of the fitting portion and the tip portion of the tooth portion of the co-rotation preventing portion have an inclined surface inclined at an angle of less than 45 degrees with respect to the horizontal direction. The dehydrating / washing machine according to any one of claims 3 to 5. 7. The lifting / lowering means includes a clutch lever having an operating portion that is engaged with a clutch and moves up and down, and the operating portion of the clutch lever is separated from the clutch at a lowered position of the clutch. The dehydrating / washing machine according to any one of claims 1 to 6, wherein: 8. The dewatering device according to claim 1, wherein the boss portion is provided with a buffer member at a position where the boss portion abuts the clutch at a lowered position of the clutch. Combined washing machine.