JPH1133277A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain entire lightening, miniaturizing and noise reduction, to attain the decrease of rotary power transmission loss, further, to unnecessitate belt tension management as well and to especially reduce impact noises at the time of motive force transmission switching. SOLUTION: At the time of washing operation, not only a stirring shaft 18 but also a stirrer 5 are directly rotated and driven by a rotor 27 of a motor 21 and, at the time of dehydrating operation, not only the stirring shaft 18 and a tub shaft 15 but also both the stirrer 5 and a spinning tub 4 are directly rotated and driven by the rotor 27 of the motor 21 in direct drive structure. Besides, a stopper 44 is provided on one side (or the other side or both the sides) in an axial direction as the switching direction of a clutch 31 for switching its motive force transmission, and an operated switching lever 34 is stopped in unabutted state to an engage party member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine having an improved drive mechanism for rotating tubs and stirring bodies.

[0002]

2. Description of the Related Art Conventionally, in a washing machine, as is well known, a stirrer is provided inside a rotating tub which is both a washing tub and a dewatering tub, and the stirring body and the rotary tub are driven by a motor. . In detail, during the washing operation, the rotation of the motor is decelerated and transmitted only to the stirrer to rotate it, and during the dehydration operation, the rotation of the motor is transmitted to both the stirrer and the rotary tank without deceleration, and these are transmitted. Is driven to rotate at high speed. Such a washing machine includes a belt transmission mechanism in a rotation transmission path from a motor to a rotary tub and a stirring body, and also includes a gear reduction mechanism having a built-in planetary gear.

[0003]

As described above, in the prior art in which the belt transmission mechanism, the gear reduction mechanism, and the like are provided in the rotation transmission path from the motor to the rotary tank and the agitator, the overall weight increases. At the same time, the overall shape becomes larger in the height direction, and a considerably loud noise is generated when the gear reduction mechanism operates. In addition, there is a problem of power transmission loss, and consideration must be given to belt tension management and the like.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and therefore has as its object to reduce the overall weight and size and to reduce noise, and to reduce rotational force transmission loss. It is another object of the present invention to provide a washing machine that does not require belt tension management and that can reduce an impact noise particularly at the time of power transmission switching.

[0005]

Means for Solving the Problems To achieve the above object, a washing machine of the present invention firstly comprises a rotating tub provided inside an outer tub and a stirring tub provided inside the rotating tub. Body and
A hollow tank shaft for transmitting rotational force to the rotary tank,
A stirring shaft that is inserted into the tank shaft and transmits a rotational force to the stirring body, a stator that is provided concentrically with the stirring shaft, and a rotor that is attached to a lower end of the stirring shaft. A motor and a holder provided on the tank shaft so as to be integrally rotatable therewith, and a switching member operably provided in the holder in the axial direction, wherein the switching member operates in the axial direction. A clutch for connecting the rotor and the stirring shaft during the washing operation by switching the engagement, and for connecting the rotor and both the stirring shaft and the tank shaft during the dewatering operation; and an axial direction of the clutch. A stopper is provided on one side or the other side or on both sides of the switch to stop the operated switching member in a non-contact state with respect to the engagement partner member.

According to this method, during the washing operation, the stirring shaft and thus the stirring body are directly driven to rotate by the motor rotor, and during the spin-drying operation, the stirring shaft and the tank shaft and thus the stirring body and the rotating tank are rotated by the motor rotor. Since both are driven to rotate directly, a so-called direct drive structure is provided, which can reduce the weight and size and reduce noise, reduce the torque transmission loss, and further improve the belt speed. There is no need for tension management. In addition, since equipment such as a motor is centrally provided at the center of the rotating tub, vibration during dehydration operation is reduced.

A stopper is provided on one side or the other side or both sides in the axial direction of the clutch so as to stop the operated switching member in a non-contact state with the mating member. The collision with the mating member can be avoided, and the collision can be stopped only by stopping the switching member, and the size of the stopper can be small, so that even if the collision occurs, there is little sound and there is no impact sound. .

Secondly, the washing machine of the present invention is provided with a stopper provided between the holder of the clutch and the switching member for stopping the operated switching member in a non-contact state with the mating member. Features. This also prevents the switching member from colliding with the mating member. Instead, the stopper that collides may only stop the switching member. It can be used, thereby eliminating the generation of impact noise.

Thirdly, the washing machine of the present invention is characterized in that a damper for decelerating the operated switching member is provided between the holder of the clutch and the switching member. This also prevents the switching member from colliding with the mating member, and does not cause the damper itself to make an impact sound.

Fourth, the washing machine according to the present invention is characterized in that a cushioning member is provided between the switching member of the clutch and a mating member thereof. According to this configuration, even though the switching member collides with the mating member, the switching member is interposed through the cushioning material, so that the generation of an impact sound can be avoided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below.
This will be described with reference to FIGS. First, FIG. 2 shows the configuration of the entire washing machine. An outer tub 2 is elastically supported in an outer box 1 via a plurality of sets (only one set is shown) of elastic suspension mechanisms 3. Inside the outer tub 2, a rotary tub 4 serving as a washing tub and a dehydrating tub is provided, and further, inside the rotary tub 4, a stirrer 5 is provided.

The rotary tank 4 includes a tank body 4a having a tapered cylindrical shape that gradually expands upward, an inner cylinder 4b provided inside the tank body 4a so as to form a pumping space, and a tank body 4a. And a balance ring 4c attached to the upper end of the head. When the rotary tub 4 is rotated, the water inside the rotary tub 4 is pumped by a rotary centrifugal force and discharged to the outer tub 2 from a dehydration hole (not shown) in the upper portion of the tub main body 4a.

A tank shaft through-hole 6 is formed at the bottom of the outer tank 2 and a drain port 7 is formed. The drain port 7 is connected to a drain 9 having a drain valve 8. . The drain valve 8 is opened and closed by a geared motor 43 described later. An auxiliary drain port 7a is formed at the bottom of the outer tank 2, and the auxiliary drain port 7a is connected to the drain passage 9 by bypassing the drain valve 8 via a connecting hose (not shown). The water discharged from the upper portion into the outer tub 2 by the rotation of 4 is discharged.

As shown in FIG. 1, a mechanism housing 10 is attached to the outer bottom of the outer tub 2. The mechanism housing 10 includes an upper frame 10 a and a lower frame 1.
0b, the upper frame portion 10a is formed with an upwardly directed tubular portion 11 at the center thereof, and the lower frame portion 10b
A downwardly facing cylindrical portion 12 is formed in the center of the. Bearings 13 and 14 composed of, for example, ball bearings are disposed in the two cylindrical portions 11 and 12, and a hollow tank shaft 15 is inserted into and supported by these bearings 13 and 14. Further, a seal 16 is fitted to the cylindrical portion 11 above the bearing 13.

A flange 17a is provided above the tank shaft 15.
Is mounted so as to rotate integrally with the tank shaft 15. Further, a stirring shaft 18 is rotatably inserted and supported in the inside of the tank shaft 15 through bearings 18a and 18b made of, for example, metal. 15 project from the lower end. Thus, the rotary tank 4 is attached to the flange portion 17a of the support cylinder 17 so as to rotate integrally, and the stirring body 5 is attached to the upper end of the stirring shaft 18 so as to rotate integrally.

A drain cover 19 is attached to the inner bottom of the outer tub 2 as shown in FIG.
A drain passage 20 extending from the bottom of the rotary tank 4 to the drain valve 8 at the drain port 7 is formed. Therefore, by supplying water into the rotary tub 4 with the drain valve 8 closed, water is stored in the rotary tub 4 from the drain passage 20, and when the drain valve 8 is opened, the water in the rotary tub 4 is drained. Water can be drained through the passage 20.

Now, the mechanism frame 1 at the outer bottom of the outer tub 2
A motor 21 configured as a brushless motor type is provided in a lower part of the motor. That is, as shown in FIG. 1, a stator 22 is mounted on the outer lower surface of the mechanism section frame 10 by screws 23 in a state of being concentric with the stirring shaft 18. The stator 22 includes a laminated iron core 24 and windings 26 wound around teeth portions thereof via bobbins 25.

On the other hand, a rotor 27 constituting the motor 21 with the stator 22 is attached to the lower end of the stirring shaft 18 so as to rotate integrally therewith. This rotor 27
Has a rotor housing 28, a rotor yoke 29, and a rotor magnet 30. The rotor housing 28 has a boss 28a at the center and a magnet arrangement portion 28b having an L-shaped cross section at the outer peripheral end. On the inner surface of the magnet arrangement portion 28b,
The rotor yoke 29 described above and the rotor magnet 30 having one pole are attached.

A clutch 31 is provided in the motor 21. In this clutch 31, the holder 32 is mounted on the outer periphery of the lower end of the tank shaft 15 so as to rotate integrally therewith. In detail, as shown in FIGS. 3 to 5, four flat surfaces 15a are formed on the lower outer surface of the tank shaft 15, and a screw hole 15b is formed in one of the flat surfaces 15a. . On the other hand, the holder 32 is formed of, for example, a metal block having a rectangular parallelepiped shape, and has a fitting hole 32a formed at a substantially central portion thereof so as to be fitted to the flat surface 15a of the tank shaft 15; A screw insertion hole 32b is formed in a side portion (right side portion in the figure).

An insertion hole 33 through which a shaft 36 described later is inserted is provided on the other side (left side in the figure) of the holder 32.
Is formed. And with that configuration, the holder 32
After the fitting hole 32a is fitted to the flat surface 15a of the tank shaft 15, a screw 32c is screwed into the screw hole 15b through the screw insertion hole 32b so that the tank shaft 15 is integrally rotated with the screw hole 15b. Installed.

The switching lever 34, which is a switching member, is formed in a rectangular frame shape.
5 so as to be integrally rotated. Insertion holes 35 corresponding to the insertion holes 33 of the holder 32 are formed on both sides of the base end 34a (the left end in the figure) of the switching lever 34, and one of the insertion holes 3 is formed.
From 5, the round rod-shaped shaft 36 is inserted into the insertion hole 33 of the holder 32.
The shaft 36 is passed between the switching lever 34 and the holder 32 by rotatably passing through the other insertion hole 35 and fixed to the other insertion hole 35. (In the vertical direction in this case).

Further, the switching lever 34 has a holder 3
2, a toggle spring 37 composed of a coil spring is provided between the projection 34b formed on the switching lever 34 and the hole 32d formed on the holder 32, thereby providing
The switching lever 34 is held at one (upper) rotational position and the other (lower) rotational position in the axial direction.
Further, at the distal end of the switching lever 34, convex portions 38a and 38b serving as engaging portions are integrally formed on the upper and lower sides, respectively, and the operated portion 39 is also integrally formed at the distal end surface. The operated portion 39 has an inclined surface 39a, which is a gradually descending guide receiving surface, on the upper right side in the drawing, and an inclined surface 39b, which is a gradually rising guide receiving surface, on the lower left side. doing.

Further, a hole 40 serving as a first engagement portion is formed in the lower frame portion 10b of the mechanism portion frame 10, which is a stationary portion, so as to correspond to the projection 38a on the upper portion of the switching lever 34. And the rotor housing 28
A plurality of convex portions 41 serving as second engagement portions are formed on the upper surface of the second member so as to correspond to the rotation locus of the lower convex portion 38b.

However, during the washing operation, FIGS.
As shown in the figure, the tank shaft 15 is fixed so as not to rotate by the engagement of the upper convex portion 38a and the hole 40, and the rotor 27 and the stirring shaft 18 are kept connected (originally, integrally). On the other hand, at the time of dehydration operation, on the other hand, as shown in FIG. 6, the tank shaft 15 and the rotor 27 are connected by engagement of the lower convex portion 38 b and the convex portion 41, and The rotor 27 is connected to both the stirring shaft 18 and the tank shaft 15.

The control lever 42 shown in FIGS. 6 and 1 is rotatably provided on the mechanism frame 10 by an intermediate support shaft 42a. The control lever 42 is a geared motor as a drain valve driving means shown in FIGS. 7 and 8. The control lever 42 is turned in the direction of arrow A (see FIG. 7) and in the direction of arrow B opposite thereto (see FIG. 8) based on the operation of 43, and the control lever 42 is moved in the direction of arrow A from the state of FIG. When turned, the downwardly inclined surface 42b shown in FIG. 9 slides on the inclined surface 39a of the operated portion 39 of the switching lever 34 to press the operated portion 39 downward. 6 and 8 by the spring force of the toggle spring 37 (the lower projection 38b of the switching lever 34 is engaged with the projection 41 of the rotor 27, and both the rotor 27 and the stirring shaft 18 and the tank shaft 15 are moved). And the state during the dehydration operation, That.

When the control lever 42 is rotated in the direction of arrow B from the state shown in FIGS. 6 and 8, the upwardly inclined surface 42c shown in FIG. Sliding contact with the inclined surface 39b of the portion 39
1 and FIG. 7 (the upper convex portion 38a of the switching lever 34 is engaged with the hole 40 of the mechanism section frame 10 by the spring force of the toggle spring 37, and 15 during the washing operation in which the rotor 27 and the stirring shaft 18 are connected. When the control lever 42 is at the position shown in FIGS. 6 and 8 (during dehydration operation), the drain valve 8 is open.

A stopper 44 is attached to the above-described clutch 31 at a position directly below the holder 32 of the tank shaft 15 on one side in the axial direction. This stopper 4
As shown in detail in FIG. 10, reference numeral 4 denotes a plate-like member having wings 44a protruding in all directions (up, down, left and right in FIG. 10), and is made of, for example, an iron plate.
A fitting hole 44b that fits with the flat surface 15a is formed. In this configuration, as shown in FIGS. 3 and 5, the fitting hole 44 b is fitted into the flat surface 15 a of the tank shaft 15, and the male screw portion 45 formed in advance at the lower end of the tank shaft 15 is formed thereon. The stopper 44 is attached to a portion of the tank shaft 15 immediately below the holder 32 so as to rotate integrally therewith by screwing and tightening a nut 46 from below.

In this mounting state, the stopper 44 has the wings 44a projecting outward around the holder 32 as shown in FIG.
In particular, it faces a portion 34c between a base end 34a, which is a pivotal support by the shaft 36, and a tip, which is a free end.

Next, the operation of the above configuration will be described. At the time of the washing operation, as described above, the control lever 42 is rotated in the direction of arrow B from the state of FIG.
0, the tank shaft 15 is fixed, and the rotor 27 of the motor 21 and the stirring shaft 18 are connected (see FIGS. 1 and 7). At this time, the rotor 27 is alternately rotated in the forward direction (the direction C in FIG. 7) and in the reverse direction (the direction D in FIG. 7), so that the stirring shaft 18 is rotated in both the forward and reverse directions. Thus, the stirrer 5 is rotated forward and backward, and the water and the laundry in the rotating tub 4 flow to wash the laundry. During such a washing operation, the rotating tub 4 tries to rotate with the water or the laundry due to the flow of the water and the laundry in the rotating tub 4. 38a and the fixing of the tank shaft 15 by the engagement of the hole 40 of the mechanism frame 10).

Next, during the spin-drying operation, the control lever 42 is rotated in the direction of arrow A from the state shown in FIG.
1 to connect the rotor 27 to both the stirring shaft 18 and the tank shaft 15 (see FIGS. 6 and 8). At this time, the rotor 27 is rotated only in the forward direction (C direction in FIG. 7), and the tank shaft 15 and the stirring shaft 18 are also integrally rotated only in the forward direction. Are rotated together.

As described above, according to the present structure, during the washing operation, the stirring shaft 18 and, consequently, the stirring member 5 are directly driven to rotate by the rotor 27 of the motor 21, and during the dehydrating operation, the stirring shaft 18 by the rotor 27 of the motor 21. And directly rotates both the tank shaft 15 and thus both the agitator 5 and the rotary tank 4, and has a so-called direct drive structure, which does not require a belt transmission mechanism, a gear reduction mechanism, etc. as in the conventional one. Lightening and miniaturization and reduction of noise can be achieved. In addition, a reduction in rotational force transmission loss can be achieved, and belt tension management and the like are not required.

Further, in the clutch 31, as described above, when the switching lever 34 is switched, the switching lever 34 is urged by the toggle spring 37 to operate. There is a possibility of violently hitting the portion 41. On the other hand, in the configuration described above, the stopper 4 is provided on the tank shaft 15 immediately below the holder 32.
When the switching lever 34 is switched in the direction of the rotor 27, the switching lever 34 is stopped by a stopper 44 as shown in FIG. 12, and more specifically, the base end 34a of the switching lever 34 ( The portion 34c between the pivot portion) and the tip portion (free end portion) forms two wing portions 44a of the stopper 44.
The rotor 2 which is the mating member in this case.
7 is stopped in a non-contact state with respect to the convex portion 41.

Thus, the collision of the switching lever 34 with the projection 41 of the rotor 27 can be avoided, and the generation of an impact sound can be prevented. In this case, instead of the stopper 4
Although the switching lever 34 collides with 4, the stopper 44 only stops the switching lever 34 and can be small enough. Therefore, even if the collision occurs, there is little sound and no impact sound is generated.

Further, in this case, the impact itself to the components such as the switching lever 34 can be reduced, whereby the repeated fatigue thereof can be reduced and the life of the components can be extended. Further, in this case, the operation stroke of the switching lever 34 can be made constant by the stopper 44, and the reliability and reliability of the switching operation can be improved. Further, it is possible to prevent the toggle spring 37 from coming off.

In addition, in the case of the above structure, the stopper 44 comes into contact with a portion 34c between the base end 34a (pivot portion) and the tip end (free end) of the switching lever 34. Since the switching lever 34 is impacted at a position where the operating distance of the switching lever 34 is short as compared with the case where the tip portion is impacted, the impact can be further reduced, the impact sound can be further reduced, and the fatigue can be reduced. Can be further reduced.

The stopper 44 stops the switching lever 34 with the wing portion 44a, and stops the switching lever 34 at a smaller, less resonating portion. It can be suppressed effectively. Further, since the stopper 44 has the wings 44a projecting in all directions, the stopper 44 can be attached without any limitation in the direction, so that the assemblability can be improved.

FIG. 13 shows another example of the stopper. The stopper 51 of this thing is a wing 51a
Are projected only in two directions on both sides. According to the stopper 51, although the mounting direction is generated,
Since the stopper 51 can be manufactured with high yield, there is an advantage that it can be provided at low cost. The fitting hole 51b of the stopper 51 in this case is the same as the fitting hole 44b of the stopper 44 described above.

FIGS. 14 and 15 show a second embodiment of the present invention, and only the differences from the first embodiment will be described. In this case, the stopper 44 is attached to a portion of the tank shaft 15 directly below the holder 32, which is one side in the axial direction of the clutch 31, by tightening with a nut 46, a stopper 61 having a wing portion 61a, and a wing portion. 62a
The stopper 62 having an upper surface is mounted on a portion immediately above the holder 32 of the tank shaft 15 which is the other side in the axial direction of the clutch 31, and is fastened with a nut 63. The stopper 62 has the wing portion 62a bent downward (one side in the axial direction of the clutch 31) to have a cushioning property upward (the other side in the axial direction of the clutch 31).

In this way, when the switching lever 34 is switched in the direction of the mechanism frame 10, the switching lever 34 is moved to the stoppers 61, 6 as shown in FIG.
Stopped by two. Specifically, in this case, the switching lever 34 is stopped by the wing portion 62a of the stopper 62,
In this case, it is stopped in a non-contact state with respect to the hole 40 portion of the mechanism section frame 10 which is the engagement partner member.

In addition, at this time, an air damper action is generated between the stoppers 61 and 62 instantaneously due to the air being trapped therein, thereby decelerating the switching lever 34.
The impact when the switching lever 34 collides with the stopper 62 can be reduced. Further, the wing portion 62a of the stopper 62 has a cushioning property due to the elasticity of the wing portion 62a bent downward, so that the impact when the switching lever 34 collides with the stopper 62 can be reduced. .

Thus, in this case, the switching lever 3
The impact when the switch 4 is switched to the mechanism section frame 10 can be further reduced, so that the impact noise and the repetitive fatigue can be further reduced. In this case, the specific number of stoppers provided may be more than two, and the plurality of stoppers may be provided on the rotor 27 side (one side in the axial direction of the clutch 31). In addition, a stopper having a cushioning property may be used for the rotor 2.
The stopper may be provided on the side 7 and, in addition, the stopper may have not only one stopper but also a plurality of stoppers.

FIGS. 16 and 17 show a third embodiment of the present invention, and only the differences from the first embodiment will be described. In this case, a stopper 71 is provided between the holder 32 of the clutch 31 and the switching lever 34. The stopper 71 is made of, for example, a cushioning material such as an elastomer, and is fixed to the inner surface of the base end 34 a of the switching lever 34.

In this embodiment, when the switching lever 34 is switched, the switching lever 34 comes into contact with the holder 32 by the stopper 71, and the convex portion 41 of the rotor 27 (an engagement partner member) and the hole of the mechanism frame 10 are formed. The forty parts (engagement mating members) are stopped in a non-contact state, respectively. Thus, as in the first embodiment, the switching lever 34 can be prevented from colliding with the engagement mating member. In this case, although the stopper 71 collides with the holder 32 instead, the stopper 71 only needs to stop the switching lever 34, and it is possible to select and use a stopper that has little sound even if it collides. With this, it is possible to eliminate the generation of an impact sound and to reduce the impact itself.

Further, in this case, the operation stroke of the switching lever 34 can be made constant by the stopper 71, and the reliability and reliability of the switching operation can be improved. or,
It is possible to prevent the toggle spring 37 from coming off.

In addition, in particular, in this case, the stopper 71 is made of a cushioning material, and
Can reduce the impact when it collides with the holder 32, so that the impact noise and the repetitive fatigue can be further reduced.

FIGS. 18 and 19 show a fourth embodiment of the present invention, and only the differences from the first embodiment will be described. In this case, a damper 81 is provided between the holder 32 of the clutch 31 and the switching lever 34. The damper 81 has, for example, a cylindrical shape, is made of an elastic material, and is inserted into each of the toggle springs 37.

In this embodiment, when the switching lever 34 is switched, the damper 81 decelerates the switching lever 34, whereby the switching lever 34
To reduce the impact when hitting the convex portion 41 (engagement member) and the hole 40 portion (engagement member) of the mechanism section frame 10 to prevent the switching lever 34 from colliding with the engagement member. it can. Further, the damper 81 itself does not emit an impact sound. Thus, also in this case, it is possible to eliminate the generation of an impact sound when the switching lever 34 is switched, and to reduce the impact itself.

FIG. 20 shows another example of a damper provided between the holder 32 of the clutch 31 and the switching lever 34. The damper 91 has, for example, a cylindrical shape and is made of an elastic material. With such a damper 91, the same operation and effect as in the fourth embodiment can be obtained.

FIGS. 21 and 22 show a fifth embodiment of the present invention, and only the differences from the first embodiment will be described. In this case, the cushioning material 101 is provided between the switching lever 34 of the clutch 31 and the mating member, in this case, on the outer peripheral surface of the distal end of the switching lever 34. The cushioning member 101 is made of, for example, an elastomer, and is provided on the outer peripheral surface of the tip of the switching lever 34 by molding with the tip of the switching lever 34 inserted. In this case, the switching lever 34 collides with the mating member. However, the collision is
1, the generation of an impact sound can be avoided, and the impact itself can be reduced.

FIG. 23 shows the switching lever 3 of the clutch 31.
4 shows a different example of a cushioning material provided between a member 4 and an engagement partner member. As described above, the cushioning member 111 is made of, for example, an elastomer. However, the cushioning member 111 is provided on the convex portion 41 of the rotor 27 which is an engagement partner member of the switching lever 34.
The rotor 27 is provided by molding with the convex portion 41 partially inserted. Even in this case, the same operation and effect as the fifth embodiment can be obtained.

The cushioning material provided between the switching lever 34 of the clutch 31 and the mating member is provided in the hole 40 of the mechanism housing 10, which is the other mating member of the switching lever 34 of the clutch 31. You may do it. In addition, the present invention is not limited to the embodiment described above and shown in the drawings, and can be implemented with appropriate modifications without departing from the scope of the invention.

[0052]

The present invention is as described above.
The following effects are obtained. According to the washing machine of claim 1, the agitator is directly driven to rotate by the rotor of the motor during the washing operation, and both the agitator and the rotary tub are directly driven to rotate by the rotor of the motor during the spin-drying operation. Because of the drive structure, the overall weight and size can be reduced, noise can be reduced, the rotational force transmission loss can be reduced, and belt tension management is not required.

Further, by stopping the operated switching member in a non-contact state with the mating member by a stopper provided on one side or the other side or both sides in the axial direction of the clutch, an impact sound is generated. Can reduce the impact itself, reduce the repeated fatigue of the parts, prolong the life of the parts, and also make the operation stroke of the switching member constant, ensuring the reliability and reliability of the switching operation Can be improved.

According to the washing machine of the second aspect, the stopper can stop the portion between the pivot portion and the free end of the switching member, so that the impact can be further reduced and the impact noise can be further reduced. , And further reduction of repeated fatigue.

According to the washing machine of the third aspect, since the stopper stops the switching member at the wing portion, the generation of the impact noise can be more effectively suppressed. In addition, since the stopper has the wings protruding only on both sides, the cost can be reduced.

According to the fourth aspect of the present invention, the impact noise and the repeated fatigue can be further reduced by the air damper function due to the presence of a plurality of stoppers on one side or the other side in the axial direction of the clutch. it can. According to the fifth aspect of the present invention, the shock absorbing property of at least one of the stoppers can further reduce impact noise and further reduce repeated fatigue.

According to the washing machine of the sixth aspect, since the stopper for stopping the operated switching member in the non-contact state with the mating member is provided between the clutch holder and the switching member. The generation of noise can be prevented, the impact itself can be reduced, and the life of the parts can be extended by reducing the repeated fatigue of the parts. In addition, the operation stroke of the switching member can be kept constant, and the switching operation can be reliably performed. In addition, reliability can be improved.

According to the seventh aspect of the present invention, since the damper for decelerating the operated switching member is provided between the holder of the clutch and the switching member, it is possible to prevent the generation of an impact sound and to reduce the impact itself. It can be made smaller and the component life can be extended.

According to the washing machine of the eighth aspect, since the cushioning member is provided between the switching member of the clutch and the mating member thereof, it is possible to prevent the generation of an impact sound and to reduce the impact itself. Thus, component life can be extended.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a main part showing a first embodiment of the present invention.

FIG. 2 is a cutaway side view of the entire washing machine.

FIG. 3 is an exploded perspective view of a main part.

FIG. 4 is an enlarged exploded perspective view of a clutch holder and a switching lever portion.

FIG. 5 is an enlarged longitudinal sectional side view of a clutch assembly part.

FIG. 6 is a longitudinal side view of a main part in different states.

FIG. 7 is a bottom view of a clutch assembly part.

FIG. 8 is a bottom view of the clutch assembly in different states.

FIG. 9 is an enlarged perspective view of a clutch part.

FIG. 10 is a plan view of a stopper alone.

FIG. 11 is a bottom view of a clutch assembly part.

FIG. 12 is a longitudinal sectional view of a state where a stopper is provided in a clutch assembly portion.

FIG. 13 is a view corresponding to FIG. 10 showing a different example of a stopper.

FIG. 14 is a front view of a clutch assembly part according to a second embodiment of the present invention.

FIG. 15 is a vertical cross-sectional view of a state where a stopper is functioning in a clutch assembly portion.

FIG. 16 is a perspective view of a clutch holder and a switching lever according to a third embodiment of the present invention.

FIG. 17 is a sectional view taken along the line EE in FIG. 16;

FIG. 18 is a plan view of a clutch holder and a switching lever according to a fourth embodiment of the present invention.

FIG. 19 is an enlarged sectional view taken along line FF of FIG. 18;

FIG. 20 is a view corresponding to FIG. 19, showing a different example of a damper.

FIG. 21 is a view corresponding to FIG. 18 showing a fifth embodiment of the present invention.

FIG. 22 is a sectional view taken along the line GG of FIG. 21;

FIG. 23 is a view corresponding to FIG. 12, showing a different example of the cushioning material.

[Explanation of symbols]

2 is an outer tank, 4 is a rotating tank, 5 is a stirring body, 10 is a mechanism housing (engagement partner member), 15 is a tank shaft, 18 is a stirring shaft,
21 is a motor, 22 is a stator, 27 is a rotor (engagement member), 31 is a clutch, 32 is a holder, 34 is a switching lever (switching member), and 34c is a portion between the pivot portion and the free end of the switching lever. Part, 36 is a shaft, 37 is a toggle spring, 38a and 38b are convex parts, 40 is a hole, 41 is a convex part,
2 is a control lever, 43 is a geared motor, 44 is a stopper, 44a is a wing, 51 is a stopper, 51a is a wing, 6
Reference numerals 1 and 62 denote stoppers, 61a and 62a are wings, 71 is a stopper, 81 and 91 are dampers, and 101 and 111 are cushioning materials.

Claims (8)

[Claims] 1. A rotary tank provided inside an outer tank, a stirring body provided inside the rotary tank, a hollow tank shaft for transmitting a rotational force to the rotary tank, A stirring shaft that is inserted through a shaft and transmits a rotational force to the stirring body, a stator that is provided concentrically with the stirring shaft, and a motor that includes a rotor that is attached to a lower end portion of the stirring shaft. A holder provided on the tank shaft so as to be integrally rotatable therewith, and a switching member operably provided in the holder in the axial direction, and engagement of the switching member by axial operation. A clutch for connecting the rotor and the stirring shaft during the washing operation and for connecting the rotor and both the stirring shaft and the tank shaft during the dewatering operation, and one of the axial directions of the clutch. Side or other side or both sides A washing machine provided with a stopper for stopping the operated switching member in a non-contact state with respect to the engagement partner member. 2. The washing machine according to claim 1, wherein the switching member of the clutch is pivotally supported by the holder, and the stopper stops between the pivot and the free end of the switching member. 3. The washing machine according to claim 1, wherein the stopper has wing portions projecting to both sides, and the switching member is stopped by the both wing portions. 4. The washing machine according to claim 1, wherein a plurality of stoppers are provided on one side or the other side in the axial direction of the clutch. 5. The washing machine according to claim 1, wherein at least one of the stoppers has a buffering property. 6. A rotary tank provided inside an outer tank, a stirring body provided inside the rotary tank, a hollow tank shaft for transmitting a rotational force to the rotary tank, A stirring shaft that is inserted through a shaft and transmits a rotational force to the stirring body, a stator that is provided concentrically with the stirring shaft, and a motor that includes a rotor that is attached to a lower end portion of the stirring shaft. A holder provided on the tank shaft so as to be integrally rotatable therewith, and a switching member operably provided in the holder in the axial direction, and engagement of the switching member by axial operation. And a clutch for connecting the rotor and the stirring shaft during the washing operation and for connecting the rotor and both the stirring shaft and the tank shaft during the dewatering operation, and switching the clutch with the holder. Activated cutting between components A washing machine provided with a stopper for stopping a replacement member in a non-contact state with respect to an engagement partner member. 7. A rotating tank provided inside the outer tank, a stirring body provided inside the rotating tank, a hollow tank shaft for transmitting a rotating force to the rotating tank, A stirring shaft that is inserted through a shaft and transmits a rotational force to the stirring body, a stator that is provided concentrically with the stirring shaft, and a motor that includes a rotor that is attached to a lower end portion of the stirring shaft. A holder provided on the tank shaft so as to be integrally rotatable therewith, and a switching member operably provided in the holder in the axial direction, and engagement of the switching member by axial operation. And a clutch for connecting the rotor and the stirring shaft during the washing operation and for connecting the rotor and both the stirring shaft and the tank shaft during the dewatering operation, and switching the clutch with the holder. Activated cutting between components A washing machine comprising a damper for decelerating a replacement member. 8. A rotary tub provided inside the outer tub, a stirrer provided inside the rotary tub, a hollow tub shaft for transmitting a rotational force to the rotary tub, A stirring shaft that is inserted through a shaft and transmits a rotational force to the stirring body, a stator that is provided concentrically with the stirring shaft, and a motor that includes a rotor that is attached to a lower end portion of the stirring shaft. A holder provided on the tank shaft so as to be integrally rotatable therewith, and a switching member operably provided in the holder in the axial direction, and engagement of the switching member by axial operation. A clutch for connecting the rotor and the stirring shaft during the washing operation, and a clutch for connecting the rotor and both the stirring shaft and the tank shaft during the dewatering operation. Between this and the mating member A washing machine comprising a cushioning material.