JPH0520315Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a washing machine used in general households, and particularly relates to the holding of a washing tub.

BACKGROUND ART Conventionally, this type of washing machine has a washing tub 20 and a dewatering tub 21 connected to a main body 22, as shown in FIGS. 6 and 7.
There is a belt 2 on the outside of the bottom of this washing tub 20.
There is a pulley 25 through which the rotation of the motor 24 is transmitted. Further, a drain pipe 26 serving as a drainage path for water in the washing tub 20 is disposed at the bottom of the washing tub 20, and drainage work is performed by moving a drainage rod 27. The motor 24 is the main body 2
2 is fixed to the underframe 28 at the bottom with bolts 29 or the like. A motor pulley 30 is fixed to the upper part of the motor 24, and a belt 23 connects the motor pulley 30 and the pulley 25 so that rotation can be transmitted therebetween. The washing tub 20 and the dehydration tub 21 are supported by screws 31 above the main body 22.

Problems that the invention aims to solve However, in the conventional configuration, the washing tub 20 is only supported by screws at the top, so when water is poured into the washing tub 20, the synthetic resin washing tub 20 moves downward. become a trend. Taking into account this lowering allowance in the design, as shown in Figure 7, the position of the motor pulley 30 is A dimension (basically about 3 mm) from the bottom outer surface of the washing tub 20 in an unloaded state (no water added). It is designed to be low. However, as the capacity of washing tubs has increased in recent years, the size of the washing tubs 20 has also tended to increase, and the drop amount has also increased, and when hot water is added, the tubs will drop by about twice that amount. Therefore, the position of the pulley 25 was located below the motor pulley 30, creating a step by a dimension B, and the amount of change in height of the pulley 25 was a dimension C, which was large.

It is sufficient to raise the outer bottom of the washing tub 20 by the amount of change C when designing, but if the height difference is 3 mm or more during no-load operation, the belt 23 will not hang horizontally during no-load operation, and the belt 23 will not hang horizontally. The problem is that the end face of the motor rubs against the pulley 25 and the motor pulley 30 and generates abnormal noise. In addition, the larger the washing tub, the stronger the reinforcement is required, which requires more reinforcing ribs, etc., and a larger amount of synthetic resin. Poor moldability,
Dimensional accuracy was also difficult to achieve.

The purpose of the present invention is to solve the above-mentioned problems, to regulate the lowering amount of the washing tub of a washing machine, to eliminate the motor pulley and pulley steps when water is loaded or cloth is loaded, and to make the rotation of the belt smooth.

Means for Solving the Problems In order to achieve the above object, the washing machine of the present invention has a washing tub built into the main body of the washing machine, a drain pipe fitted outside the bottom of the washing tub, and a washing machine at the bottom of the washing tub. A pulley located outside that transmits rotation to the stirring blades in the washing tub, a frame provided at the bottom of the main body to which the motor is fixed, a motor pulley attached to the drive shaft of the motor, and a A cylindrical pipe is suspended from a part of the drain pipe, and a cylinder that comes into contact with the cylindrical pipe is made to protrude from the underframe, and the gap between the contact surfaces is cleaned. This configuration has the same horizontal upper height difference between the pulley on the outside of the tank bottom and the motor pulley on the drive motor side.

Effect With the above configuration, even if cloth or water is put into the washing tub, the cylinder of the underframe and the cylindrical pipe of the washing tub come into contact with each other, preventing the washing tub from sinking downward. Since the contact gap with the cylinder is equal to the horizontal step between the pulley and the motor pulley,
When the pipes abut each other, the pulleys are horizontal and parallel.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings. 1 to 5, a washing tub 2 and a dehydrating tub 3 are installed inside a main body 1, and are fixed to the upper part of the main body 1 with screws 4. An L-shaped drain pipe 5 for draining water is fitted to the outside of the bottom of the washing tub 2, and a cylindrical pipe part 7 is suspended from below the fitting part 6 of the drain pipe 5.

Further, at the inner bottom of the washing tub 2, there is a stirring blade pulsator 8 for stirring the clothes, which is rotatably connected to a pulley 9 provided outside the bottom of the washing tub 2. At the bottom of the main body 1, there is a frame 12 to which a washing motor 10 and a dewatering motor 11 are attached. Rotation is transmitted from a motor pulley 13 attached to the shaft of a washing motor 10 to a pulley 9 via a belt 14. A drain valve 15 for draining water is provided in the drain pipe 5, and the drain valve 15 is opened and closed by a drain rod 16 for opening and closing. 17 serves as an outflow path for drainage. 18 is a filter for preventing clothes in the washing tub 2 from flowing into the drain pipe 5.

A cylindrical pipe part 7 disposed below the fitting part 6 of the drain pipe 5 with the washing tub 2 is provided with a cylinder 19 projecting from a part of the underframe 12.

Next, the configuration of the cylindrical pipe 7 and the cylindrical portion 19 and the positional relationship between the motor pulley 13 and the pulley 9 of this embodiment will be explained with reference to FIG. In a no-load state, the pulley 9 is moved by the dimension D from the height of the motor pulley 13.
Place it high.

The D dimension is approximately 3 mm, and this D dimension is a dimension in which the washing tub 2 is lowered by the weight when water or cloth is loaded. At the time of water load or cloth load, the motor pulley 13 and pulley 9 are positioned horizontally, and the belt 14
The rotational conduction can be carried out smoothly. The E dimension, which is the same as this D dimension, is set as the height gap between the cylindrical pipe portion 7 and the cylinder 19. When the washing tub 2 is lowered by the dimension D due to the weight of water and cloth, the cylindrical pipe portion 7
The E dimension between the upper surface portion 20 and the upper surface portion 21 of the cylinder 19 also disappears and they come into contact. Therefore, the difference in level between the pulley 9 and the motor pulley 13 will not exceed dimension D. That is, the pulley 9 does not fall below the horizontal state, and the belt is always maintained in a horizontal state. Cylindrical pipe 7 and cylinder 19 only in dimension E when no load is applied.
The reason why this gap is left open is that if the washing tub 2 side and the frame 12 side are brought into contact with each other in an unloaded state, the rotation sound will be more likely to be heard throughout the body, and if water, cloth, etc. enter, the overall weight will increase. As the noise becomes louder, there is an effect of muffling the sound, and there is no problem even if they are brought into contact with each other.

Moreover, the reason why this abutting part is provided at the lower part of the fitting part 6 of the drain pipe 5 is that the entire fitting part 6 receives the force when the cylindrical pipe part 7 and the tube 19 come into contact with each other.
Since no deforming force such as prying is applied to the fitting part 6, water leakage etc. will not occur. It is also possible to provide a contact pipe from the washing tub 2 side from the washing tub 2 itself, but in that case, the contact pipe would be long, and for that reason it would be located at the lowest position at the bottom of the washing tub 2. Providing it in the drain pipe 5 is advantageous in terms of distance.

Further, when the cylindrical portion 19 from the underframe 12 is stacked up on the underframe 12, it is useful for positioning and prevention of misalignment, etc., as shown in FIG. Furthermore, as shown in FIG. 5, since the abutment part between the cylindrical pipe part 7 and the cylinder 19 prevents the washing tub 2 from moving in the lateral direction, the position of the motor pulley 13 and the pulley 9, and the position of the belt 14 This maintains the spacing and prevents the belt 14 from loosening.

Effects of the Invention As is clear from the above embodiments, according to the present invention, the pulley for rotating the stirring blade and the motor pulley can be kept parallel to each other during fabric load operation, and smooth rotational motion can be transmitted. In addition, since the washing tub side and the underframe side are fitted together at the pipe portion, it helps to maintain the belt tension and maintains the positional relationship, thereby improving the quality of the product. Furthermore, the cylindrical portion of the underframe serves as a guide boss when the underframe itself is stacked for storage, and is also useful for positioning and preventing collapse during stacking.

[Brief explanation of the drawing]

Fig. 1 is a rear view of a washing machine according to an embodiment of the present invention, Fig. 2 is a detailed sectional view of the pipe section and cylinder section,
Figure 3 is a diagram showing the height relationship between the cylindrical pipe section, cylinder, motor pulley, and pulley, Figure 4 is a front view when the frame is stacked, and Figure 5 is a plan view of the washing machine. , FIG. 6 is a rear view of a conventional washing machine, and FIG. 7 is a diagram showing the positional relationship among the motor, motor pulley, and pulley. 1...Main body, 2...Washing tub, 5...Drain pipe, 6
... Fitting part, 7 ... Cylindrical pipe, 9 ... Pulley, 10 ... Motor, 12 ... Underframe, 13 ...
Motor pulley, 14...belt.

Claims (1)

[Scope of utility model registration request] A washing tub built into the main body of the washing machine, a drain pipe fitted outside the bottom of the washing tub, a pulley located outside the bottom of the washing tub that transmits rotation to the agitation blades inside the washing tub, and a main body. It includes an underframe provided at the bottom to which a motor is fixed, a motor pulley attached to the drive shaft of the motor, and a belt that transmits rotation from the motor pulley to the pulley. The cylindrical pipe is hung down, the cylinder that contacts the cylindrical pipe protrudes from the underframe, and the gap between both abutting surfaces is made the same as the horizontal upper step dimension of the pulley outside the bottom of the washing tub and the motor pulley on the drive motor side. A washing machine.