JPS6312871Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a bearing device for a washing machine that supports a shaft that receives the rotational power of a washing machine motor and rotates an object to be rotated, such as an agitator, in a state that prevents it from coming off. .

[Background technology of the invention]

Conventionally, in a washing machine, a speed reduction mechanism is provided at the bottom of the tub, and an agitator, which is an agitator, is connected to the output shaft of the speed reduction mechanism, and the rotational power of the washing machine motor is transmitted to a reduction gear inside the speed reduction mechanism to rotate the output shaft. In this type of washing machine, a bearing is provided inside the housing of the reduction mechanism to support the output shaft, and the output shaft is supported by a bearing in order to receive the output shaft. A stop ring serving as a stopper is radially engaged in a groove serving as an engaging portion formed on the shaft, and is applied to the end face of the bearing to prevent the output shaft from coming off.

[Problems with the background art] By the way, generally when a stop ring is attached to a groove of a shaft, the stop ring is aligned with the groove with the fingers, and while holding this position, the stop ring is pushed in the radial direction with an appropriate tool. However, the installation work while maintaining the alignment state is really troublesome, especially since the output shaft of the reduction mechanism is installed inside the housing that has the gear case part and the bearing case part integrally, so it is difficult to install it by hand. There were problems in that it was difficult to hold the stop ring, it took time and effort to align it, and the work efficiency was very poor.

[Purpose of invention]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a bearing device for a washing machine that allows easy attachment of a retainer and improves work efficiency.

[Summary of the idea]

The present invention forms a flat part in the bearing case that is adjacent to and flush with the end face of the bearing, and by placing the retainer on the flat part, the retainer can be attached to the end face of the bearing. It is unique in that it can be automatically aligned with the engaging part of the shaft, which is at the same level as the shaft.

[Example of idea]

An embodiment of the present invention will be described below with reference to the drawings. First, with reference to FIG. 1, the schematic structure of a washing machine, for example, a washing machine with dehydration and dehydration functions will be described. 1 is the outer box, 2
4 and 5 are the washing machine motor and mechanism provided at the outer bottom of the water receiving tank 2, and 6 is the washing machine motor 4. and a stirring shaft (not shown) of the mechanism section 5. On the other hand, 7 is a rotating tank disposed in the water receiving tank 2, which is connected to the tank shaft 8 of the mechanism section 5. ing. Reference numeral 9 denotes a stirring body disposed at the inner bottom of the rotating tank 7 , and this is connected to the stirring shaft in the mechanism section 5 via a speed reduction mechanism 10 arranged at the inner bottom of the rotating tank 8 . As shown in FIG. 2, the speed reduction mechanism 10 has a gear mechanism 1 in a housing 11.
The output shaft 13 has serration shaft parts 14 and 15 formed at its upper and lower ends, and the lower part of the upper serration shaft part 14. A collar part 16 is formed on the outer periphery, and a serration shaft part 1 at the lower part is formed.
A groove portion 1 serving as an engaging portion is provided on the outer circumferential surface of a portion slightly above portion 5.
7 is formed. This output shaft 13 is provided in the housing 11 by a bearing device to be described later, and serration shaft portions 14 and 15 of the output shaft 13 are connected to the stirring body 9 and the gear mechanism 12, respectively. The output shaft 13 of the lever receives the rotational power of the washing machine motor 4 via the belt transmission mechanism 6, stirring shaft, and gear mechanism 12, and rotates the stirring body 9 (rotated body).

Now, to describe the bearing device that receives the output shaft 13, the housing 11 has a gear case portion 1.
8 and a bearing case part 19 which is a bearing case, and a shaft insertion part 20 in the bearing case part 19.
The upper end of the output shaft 13 and the shaft insertion part 20 are provided at the upper end.
A seal member 21 is fitted to seal between the output shaft 13 and a bearing 22 that supports the upper end of the output shaft 13.
A bearing 23 that supports the lower end of the output shaft 13 is fitted to the lower end. Note that the flange 1 of the output shaft 13
6 rests on the upper end surface of the upper bearing 22.
Further, the bearing case portion 19 of the housing 11 is formed with a flat portion 24 adjacent to and flush with the end surface 23a of the lower bearing 23. 25
is a stopper such as a stop ring, which is the third
As shown in the figure, the output shaft 13 is engaged with the groove 17 of the output shaft 13, and the peripheral edge protruding from the output shaft 13 is wrapped around the end surface 23a of the lower bearing 23.
It prevents it from coming out upwards.

Now, to describe the procedure for installing the stop ring 25, as shown in FIG.
Retained by 6. In this case, the seal 21 and the bearings 22 and 23 are attached to the bearing case portion 19 of the housing 11.
Attach the seal 2 on the output shaft 13 as well.
1. Insert it into the bearings 22 and 23. Therefore, the fourth
In the illustrated state, the bearing 23 is located above, the bearing 22 is located below, and the flat portion 24 is also directed upward. Further, the groove portion 17 of the output shaft 13 is on the same level as the end surface 23a of the bearing 23. In this state, the stop ring 25 is placed on the flat part 24. In this case, since the flat portion 24 is adjacent to and flush with the end surface 23a of the bearing 23, the stop ring 25 is attached to the output shaft 1.
3, that is, the stop ring 25 is self-aligned with the groove 17. After that, use the tool 27 to remove the stop spring 2.
5 is slid in the direction of the groove 17, that is, in the radial direction of the output shaft 13, and is engaged with the groove 17.

As described above, according to this embodiment, the stop ring 25 can be aligned with the groove 17 of the output shaft 13 by simply placing the stop ring 25 on the flat part 24, and therefore, the stop ring can be aligned with the groove 17 by hand. Unlike the conventional method, in which the stop ring 25 has to be aligned and maintained in that position, the stop ring 25 can be installed very easily. This is particularly effective in this embodiment, where the stop ring 25 is attached to a relatively deep part of the housing 11.

In the above embodiment, the flat portion 24 has a uniform flat surface, but the flat portion may have radial grooves, etc. In short, the end surface 2 of the bearing 23 as a whole
3a and flush with the end surface 23a of the bearing 23. Further, the retainer is not limited to a stop ring, but may be a so-called pine needle pin, and therefore, in this case, the engaging portion is a hole instead of a groove. Further, in the above embodiment, the present invention is applied to the output shaft of the speed reduction mechanism, but the present invention is not limited to this, and can be applied to, for example, a shaft in the mechanism section 5. Other aspects of the present invention may deviate from the gist. It can be implemented with various changes within the scope.

[Effect of idea]

As is clear from the above description, the present invention includes a bearing case, a bearing that is provided inside the bearing case and supports a shaft that receives rotational power from a washing machine motor and rotates an object to be rotated such as an agitator. In the bearing device for a washing machine, the bearing device includes a retainer that is radially engaged with an engaging portion formed on the shaft and that is attached to an end face of the bearing to prevent the shaft from coming off. It is characterized by forming a flat part adjacent to and flush with the end face of the bearing, whereby the positioning of the retainer with respect to the engaging part of the shaft is controlled by the flat part. This has the excellent effect of not only being able to do this automatically, but also guiding the retainer in the radial direction after positioning, making it really easy to attach the retainer, and as a result, work efficiency can be greatly improved. play.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a vertical side view of a washing machine, Fig. 2 is an enlarged longitudinal side view of the speed reduction mechanism, Fig. 3 is a cross-sectional view of the stop spring attachment part, and Fig. FIG. 3 is an enlarged longitudinal sectional side view for explaining attachment of the stop ring. In the figure, 6 is a washing machine motor, 9 is an agitator (rotated body), 10 is a speed reduction mechanism, 11 is a housing, 13
17 is an output shaft (shaft), 17 is a groove portion (engaging portion), 19 is a bearing case portion (bearing case), 23 is a bearing, 24 is a flat portion, and 25 is a stop ring (removal stopper).

Claims (1)

[Scope of utility model registration request] a bearing case, a bearing that is provided inside the bearing case and supports a shaft that rotates an object to be rotated such as an agitator in response to the rotational power of a washing machine motor; and a retainer that is attached to the end surface of the bearing and prevents the shaft from coming off, the retainer being adjacent to and flush with the end surface of the bearing in the bearing case. A bearing device for a washing machine, characterized in that a flat portion is formed.