JPS5839198Y2 - Sentakuki - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a washing machine having a structure in which the rotational driving force of a washing motor is transmitted to an agitation blade via a belt transmission mechanism.

The belt transmission mechanism of this type of washing machine has a drive pulley attached to the rotating drive shaft of the washing motor, and a rotating shaft directly connected to the agitating blades, which is inserted through and supported by a bearing cylinder arranged and fixed at the bottom of the washing tub. A driven pulley is attached and a belt is stretched between both pulleys.

According to this configuration, since the tension of the belt is constantly acting on the rotating shaft, the bottom of the laundry tub is affected by the force (
As a result of this deformation, the bearing cylindrical body and rotating shaft tilt, the agitating blades tilt with respect to the bottom of the washing tub, and part of their outer periphery comes into contact with the inner bottom surface of the washing tub. This may cause other inconveniences.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to insert and support a rotating shaft directly connected to the stirring blades through a bearing tube fixed to the bottom of the washing tub, thereby transmitting the rotational driving force of the washing motor. In a washing machine configured to transmit transmission to the rotating shaft via a belt transmission mechanism, a washer member is provided that is fitted into the bearing cylinder and fixed to the outer bottom of the washing tub together with the bearing cylinder, and the belt is attached to the washer member. By integrally extending the reinforcing arm that is oriented in the tension direction of the belt of the transmission mechanism and that contacts the outer bottom of the washing tub, deformation of the bottom of the washing tub can be greatly reduced, and the stirring blades can be moved inside the washing tub. To provide a washing machine that can eliminate inconveniences such as contact with the bottom.

An embodiment of the present invention will be described below based on the drawings.

Reference numeral 1 denotes an outer box in which an operation box 2 is arranged at the rear of the upper part, and a washing tub 3 and a dewatering tub 4 are arranged side by side inside the outer box.

A rotary tank 5 for centrifugal dehydration is provided within the dehydration tub 4 and is directly rotationally driven by a dehydration motor (not shown).

On the other hand, the washing tub 3 has a bottom portion that is curved so as to be inclined downwardly toward the center pipe, and a circular concave portion 6 is formed at the inclined portion that is laterally shifted from the lowest bottom portion. This is the configuration.

Reference numeral 7 denotes a protruding portion formed to bulge downward at approximately the center of the concave portion 6, and 8 denotes an annular rib protruding from the outer bottom of the concave portion 6 so as to surround the protruding portion 7. The height of the protrusion 8 is set to be slightly larger than that of the protrusion 7.

Reference numeral 9 denotes a bearing cylinder which is inserted through the protruding part 7 of the recessed part 6, and a flange 9a extending from the upper outer periphery thereof is supported by the inner bottom surface of the recessed part 6. A male screw 9b is screwed into an intermediate portion halfway toward the lower end.

Reference numeral 10 denotes a washer member, which is fitted around the outer periphery of the bearing cylinder body 9 from its lower end and positioned at the outer bottom of the recessed portion 6.

Reference numeral 11 designates a nut as a tightening member, and this nut 11 is screwed onto the male thread 9b of the bearing cylinder 9 to fix the bearing cylinder 9 together with the washer member 10 in the recess 6.

In this case, by setting the height of the rib 8 to be larger than that of the protrusion 7, the washer member 10 has elasticity such that the central portion contacts the protrusion 7 and the outer peripheral edge contacts the rib 8. The deformation enhances the tightening effect of the nut 11 and reinforces the concave portion 6.

Reference numeral 12 denotes a rotating shaft which is rotatably inserted and supported by the bearing cylinder 9, and a stirring blade 13 for vortex water flow control is fixed to the upper end of the shaft which projects from the bearing cylinder 9 into the washing tub 3. It is directly connected to

The lower portion of the stirring blade 13 is located within the recessed portion 6, and has a gap between it and the inner circumferential side surface of the recessed portion 6 to the extent that coins and the like will not slip.

Reference numeral 14 denotes a washing motor, which is disposed at a predetermined position spaced apart from the rotating shaft 12, for example, at one end of the inner bottom of the outer box 1.

15 transfers the rotational driving force of the washing motor 14 to the rotating shaft 1.
2, this is a belt transmission mechanism that transmits to the washing motor 14.
A driving pulley 16 is attached to the rotary drive shaft 14a of the bearing body 9, and a driven pulley 17 is attached to the lower end of the rotary shaft 12 that protrudes downward from the bearing cylinder 9, and a belt 18 is inserted between both pulleys 16 and 17. It is stretched with a predetermined tension.

Reference numeral 19 denotes a reinforcing arm for preventing the inclination of the bearing cylinder 9 and the rotating shaft 12, which extends integrally from the outer peripheral edge of the washer member 9 toward the tension direction of the belt 18, and has a middle portion. The concave portions 6 are curved in parallel with each other with a predetermined gap on the outer circumferential surface of the concave portion 6 such that the tip portion thereof contacts the outer bottom surface of the washing tub 3 .

19a and 19b are upright pieces bent on both sides of the reinforcing arm 19.

Reference numeral 20 denotes a drain hose, whose one end located inside the outer box 1 branches into three branches, and the first branch is connected to the drain port of the washing tub 3 (not shown) via a drain valve (not shown). In addition, the second branch is connected to the overflow port (not shown) of the washing tub 3, and the remaining third branch is connected to the drain port (not shown) of the dewatering tub 4.

Moreover, 21 and 22 are strainers that are placed over the respective openings of the drain port and the overflow port of the washing tub 3.

Next, the operation of this embodiment configured as described above will be described.

Of course, while the stirring blade 13 is being rotated by the washing motor 14,
Even when the rotating shaft 12 is stopped, the tension of the belt 18 is constantly acting on the rotating shaft 12, so the bottom of the recessed portion 6 is attached to the rotating shaft 12.
The bearing is deformed by the force (mainly bending moment) due to the tension of the belt 18 via the bearing cylinder 9 and the like.

In the conventional structure in which the reinforcing arm 19 is not provided, the bottom of the concave portion 6 is directly subjected to the force due to the tension of the belt 18, resulting in large deformation, and as a result, the rotating shaft 12 and the bearing cylinder 9 are deformed. Due to the tilting, the stirring blades 13 are also tilted greatly with respect to the bottom of the washing tub 3, and a part of the outer peripheral edge may come into contact with the inner peripheral surface of the recessed part 6, or a part of the blade portion may fall inside the washing tub 3. This caused inconveniences such as protruding too much and damaging the fabric of the laundry.

However, according to this embodiment, the reinforcing arm 19 is integrally extended to the washer member 10 in a direction in which the belt 18 is pulled, and its tip is brought into contact with the outer bottom surface of the washing tub 3 other than the concave portion 6. Since the force acting on the bottom of the recess 6 is also received by the bottom of the washing tub 3 via the washer member 10 and the reinforcing arm 19, the force acting on the bottom of the recess 6 is extremely reduced and the degree of deformation is reduced. will also become extremely small.

As a result, the inclination of the stirring blades 13 with respect to the bottom of the washing tub 3 becomes extremely small, so that a part of the outer periphery comes into contact with the inner peripheral surface of the recessed part 6, or a part of the blade part falls inside the washing tub 3. It is possible to eliminate inconveniences such as excessive protrusion.

In the above embodiment, the reinforcing arm 19 is spaced apart from the outer peripheral surface of the concave portion 6, but there is no problem even if the reinforcing arm 19 is brought into contact with the outer circumferential surface of the recessed portion 6.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with various modifications without departing from the gist thereof.

As explained above, the present invention can provide a washing machine that can significantly reduce the deformation of the bottom of the washing tub and eliminate inconveniences such as the agitating blades coming into contact with the inner bottom of the washing tub. be.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway perspective view of the whole, FIG. 2 is an enlarged vertical cross-sectional view of the main part, and FIG.
The figure is an enlarged bottom view seen from the direction of the arrow III--III in FIG. 2. In the drawings, 1 is an outer box, 3 is a washing tub, 6 is a recessed part, 7 is a protrusion, 8 is a rib, 9 is a bearing cylinder, 10 is a washer member, 11 is a nut (tightening member), 12 is a rotation Shaft, 13 is stirring blade, 1
4 is a washing motor, 15 is a belt transmission mechanism, 16 is a driving pulley, 17 is a driven pulley, 18 is a belt, and 19 is a reinforcing arm.

Claims (1)

[Scope of utility model registration request] A cylindrical bearing body is provided so as to pass through a circular concave portion formed at the bottom of the laundry tub, and a washer is fitted around the outer periphery of the cylindrical bearing body so as to be positioned at the outer bottom of the concave portion. a fastening member that fixes the bearing cylinder body together with the washer member in the recessed part, a rotating shaft that is rotatably inserted through and supported by the bearing cylinder body and directly connected to a stirring blade positioned in the recessed part; a washing motor disposed at a predetermined position spaced apart from a rotating shaft; a belt transmission mechanism for transmitting the rotational driving force of the washing motor to the rotating shaft; and a reinforcing arm that extends integrally with the reinforcing arm and whose distal end side contacts the outer bottom of the washing tub other than the recessed portion.