JPH03191993A - Reduction device for washing machine - Google Patents

Abstract

PURPOSE:To make it possible to prevent meshing noise between a gear unit and a gear from leaking outside by providing an internal elastic body between the shaft part and tooth part of a planetary gear unit. CONSTITUTION:An internal elastic body 37 is fitted in a planetary gear outer ring 36, and a cylindrical pin 38 is fitted in a hole which is provided at the center of the internal elastic body 37. This planetary gear unit 35 is rotatably attached to a gear supporter 30 around a pin 29 es its center. By this structure, meshing noise between an inner sun gear 25 and a plurality of planetary gear units 35, and between the planetary gear unit 35 and an outer sun gear 28, which generates at the time of washing, can be prevented from being transmitted to the outside, and a reduction device for washing machine with low noise can be offered. If an external elastic body is provided between the outer sun gear 28 and a dehydrating rotation shaft unit 18, the noise becomes still smaller.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a speed reduction device for a washing machine, and particularly to the structure of a planetary gear mechanism.

2. Description of the Related Art A conventional single-tank electric washing machine had a structure as shown in FIG. That is, a washing and dehydrating tank 2 is provided inside an outer tank 1 that receives washing water, a pulsator 3 is provided at the bottom of this washing and dehydrating tank 2, and a large number of small holes 4 for draining water are provided in the side wall. The mechanical case 6 has a mechanism that transmits the driving force of the motor 6 so that only the pulsator 3 is rotated during washing, and the face wash/dehydration tank 2 is rotated during dehydration. Further, the motor 6 transmits driving force to the mechanical case 5 through a belt 7 and a pulley 8. The drain valve 9 and brake arm 10 of the outer tank 1 are configured to be pulled by a solenoid 11. The support plate 12 includes an outer tank 1, a motor 6, and a mechanical case 5.
A balancer 16 is provided on the upper part of the washing/dewatering tank 2, and a drain hose 16 is provided connected to the drain valve 9, and is suspended from the exterior body 14 by a rod 13. An opening/closing lid 17 is provided.

Next, the detailed structure of the conventional mechanical case 6 will be explained with reference to FIG. 6. The dewatering rotary shaft unit 18 is supported by the lower mechanical case 19 via a lower bearing 201. The upper clutch spring 21 is connected to the dehydration rotating shaft unit 18
For those that only rotate in the clockwise direction, upper mechanical case 2
2 fixes the seal packing 23 and the upper bearing 24. A mechanism for decelerating the rotation of the pulley 8 and transmitting it to the pulsator 3 is incorporated inside the dewatering rotary shaft unit 18 . That is, a gear shaft 26 having an inner sun gear 26 is connected to the pulley 8, and a plurality of planet gears 2 are connected to the inner sun gear 26.
7 are engaged with each other, and an outer sun gear 28 is fixed to the dewatering rotary shaft unit 18 on the outside thereof so as to engage with the planetary gear 27. The planetary gear 27 is rotatably attached to a gear supporter 30 around a pin 29, and a washing shaft 31 is attached to the gear supporter 3o in a serrating structure.
is supported by the dewatering rotary shaft unit 18 by two shaft metals 32, and the pulsator 3 is attached to the upper end thereof.

Switching between washing and dewatering is performed using the brake arm 1o. That is, during washing, the lower clutch spring 34 is loosened by the brake arm 1o via the clutch boss 33, and the driving force from the motor 6 is transmitted only to the gear shaft 26. Further, during dewatering, the brake arm 1o is separated from the clutch boss 33, the lower clutch spring 34 is in a tightened state, and the driving force from the motor 6 is transmitted to the dehydrating rotary shaft unit 18, which is attached to the upper end of the dehydrating rotary shaft unit 18. The washing and dehydrating tank 2 is rotated.

Problems to be Solved by the Invention In such a conventional speed reduction device for a washing machine, the pulsator 3 is rotated by decelerating the speed through a planetary gear mechanism during washing, which generates gear meshing noise and noise during washing. In other words, when the gear shaft 26 having the inner sun gear 26 rotates, the inner sun gear 26 and the plurality of planetary gears 27
, and the planetary gear 27 and the outer sun gear 28 mesh with each other, and a sound is generated at this time. At that time, the meshing sound is transmitted from the planetary gear 27 to the gear supporter 3o via the pin 29.
It is transmitted to the gear supporter 30 and the washing shaft 3
1, and from the washing shaft 31 to the pulsator 3, and on the other hand, it is also transmitted to the dewatering rotary shaft unit 18 via the shaft metal 32, and further to the washing and dehydrating tank 2, and the noise spreads to the outside. Further, the meshing noise between the planetary gear 27 and the outer sun gear 28 was transmitted from the outer sun gear 28 to the dehydration rotation shaft unit 18 and further to the washing and dehydration tank 2.

The present invention solves the above-mentioned problems by preventing meshing noise between an inner sun gear and a plurality of planetary gears, and between a planetary gear and an outer sun gear from being transmitted from the planetary gear to the gear supporter via the pin. The objective of tJ- is to obtain a noise reduction device for washing machines.

A second object of the present invention is to prevent meshing noise between the inner sun gear and the plurality of planetary gears, and between the planetary gear and the outer sun gear, from being transmitted from the pin to the gear supporter and from the outer sun gear to the dehydration rotating shaft unit. , to obtain a washing machine speed reduction device with even lower noise.

Means for Solving the Problems In order to achieve the above-mentioned first object, the present invention provides a planetary gear mechanism that reduces the rotational speed of a pulsator during washing, and a shaft portion and a tooth portion of the planetary gear of this planetary gear mechanism. An inner elastic body is provided in between.

In addition, in order to achieve the second objective, a planetary gear mechanism is provided to reduce the rotation speed of the pulsator during washing, and an inner elastic body is provided between the shaft and teeth of the planetary gear of this planetary gear mechanism. The outer sun gear of a gear mechanism is stacked with an outer elastic body.

Operation The speed reduction device for a washing machine according to the present invention has the above-mentioned configuration, so that the meshing sound between the inner sun gear and the plurality of planetary gears, and between the planetary gear and the outer sun gear is transmitted from the planetary gear to the gear supporter via the pin, and is further transmitted from the washing shaft to the gear supporter. Since it is possible to prevent leakage to the outside through the pulsator, it is possible to provide the user with a washing machine with a simple structure and very low washing noise.

In addition, an elastic body is provided between the shaft and the teeth of the planetary gear, and the outer sun gear of the planetary gear mechanism is covered with an elastic body. Since the meshing noise of the sun gear can be completely blocked, it is possible to provide a completely low-noise speed reduction device for a washing machine.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1, 2, 3, and 4. In addition, the same reference numerals are attached to the same members as the conventional structural members, and the explanation thereof will be omitted.

1, 2, and 3, the planetary gear unit 36 is composed of a planetary gear outer ring 36, an inner elastic body 37, and a cylindrical bottle 38, and the inner elastic body 37 is fitted inside the planetary gear outer ring 36. Further, a cylindrical pin 38 is fitted into a hole 39 provided in the center of the inner elastic body 37.

This planetary gear unit 36 is rotatably attached to the gear supporter 3o around a pin 29.

With this structure, the meshing sound between the inner sun gear 26 and the plurality of planetary gear units 36, and between the planetary gear unit 36 and the outer sun gear 28, which is generated during washing, is transmitted to the inner elastic body 37.
This can prevent transmission from the cylindrical pin 38 to the pin 29 and then to the gear supporter 3o. Therefore,
To provide a low-noise speed reduction device for a washing machine, allowing a user to wash clothes at night without worrying about noise.

Next, other embodiments of the present invention will be described.

In FIG. 4, the planetary gear unit 36 is composed of a planetary gear outer ring 36, an inner elastic body 37, and a cylindrical pin 38. The inner elastic body 37 is fitted inside the planetary gear outer ring 36, and the cylindrical pin 38 is Fitted into the inner elastic body 37, the planetary gear unit 36 is rotatably attached to the gear supporter 30 around the pin 29. Further, between the outer sun gear 28 and the dehydration rotating shaft unit 18, there is an outer diameter 1
An outer elastic body 39 is provided so as to cover the outer side and part of the upper and lower parts of the field gear 28. With this structure, the planetary gear outer ring 36 and the washing shaft 31
, and the space between the outer sun gear 28 and the dehydration rotary shaft unit 18 is completely floating due to the outer elastic body 40. Therefore, the meshing noise of the gears can be prevented from leaking to the outside from the pulsator 3 and the washing/dehydrating tank 2.

Effects of the Invention As described above, the present invention provides an inner elastic body between the shaft portion and the tooth portion of the planetary gear unit, so that the inner sun gear and the planetary gear unit, and the planetary gear unit and the outer sun gear The meshing force is transmitted from the planetary gear to the gear supporter via the pin, and is further transmitted from the current shaft to the pulsator to prevent it from leaking to the outside, resulting in a simple structure and very low noise washing machine. This allows the user to do laundry whenever they like, even at night, without worrying about noise. Furthermore, since the structure is simple, there are no manufacturing problems.0 Furthermore, the present invention provides an inner elastic body between the shaft portion and the tooth portion of the planetary gear unit, and furthermore, the outer sun gear is formed of the outer elastic body. To provide a speed reduction device for a washing machine that is extremely low in noise because it can completely block out the meshing noise between an inner sun gear and a planetary gear unit, and a planetary gear unit and an outer sun gear. It is something that can be done.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a speed reduction device for a washing machine according to an embodiment of the present invention, FIG. 2 is a perspective view of the main parts, VGA is an exploded perspective view of the main parts, and FIG. FIG. 6 is a vertical cross-sectional view of a speed reduction device for a washing machine according to another embodiment, FIG. 6 is a vertical cross-sectional view of a speed reduction device for a conventional washing machine. 26...Inner sun gear, 28...Outer sun gear, 29...Pin, 30...Gear supporter, 36...Planet tooth portion unit, 36
・・・・・・Planetary gear outer ring (m part), 37・・・・・・
Inner elastic body, 38... Cylindrical pin (shaft part), 39
・・・・・・Outer elastic body.

Claims (2)

[Claims] (1) A speed reduction device for a washing machine that includes a planetary gear mechanism that reduces the rotational speed of a pulsator during washing, and an inner elastic body provided between the shaft and teeth of the planetary gear of this planetary gear mechanism. (2) A planetary gear mechanism that reduces the rotational speed of the pulsator during washing; an inner elastic body is provided between the shaft and teeth of the planetary gear of this planetary gear mechanism, and the outer sun gear of the planetary gear mechanism is moved outward. A washing machine speed reduction device covered with an elastic material.