JPS5811352Y2 - Sentakukinokudousouchi - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a driving device for a washing machine.

A conventional washing machine drive device has a motor that drives the stirring blades attached to a beam fixed to the lower surface of the outer frame, and a motor pulley fitted to the shaft of this motor and a pulsator pulley fitted to the shaft of the stirring blades. A V-belt was stretched between the two.

In this case, the pulsator pulley is installed on the underside of the washing tub, and the motor pulley is fitted onto the motor shaft installed on the underside of the outer frame, so dimensional errors in the parts and
Due to assembly variations, etc., the parallelism of the stretched V-belt (whether the rotation plane of one pulley lies on the rotation plane of another pulley) may deteriorate, or the tensile strength of the V-belt may deteriorate. If there are variations and the tension is particularly strong, vibrations from the motor and uneven rotation of the pulley will be transmitted through the V-belt, causing the washing tub to vibrate, leading to noise.

In addition, when the belt is stretched too tightly, drive transmission is not carried out well, and the V-belt often slips completely due to load fluctuations during washing.

In order to reduce these troubles, it was necessary to precisely adjust the tension of the V-belt.

Even after sufficient adjustment as described above, V-belts that have been used for a long period of time tend to slip easily. Sometimes it would break.

In addition, when the motor is fixed to the beam of the outer frame, it is attached via anti-vibration rubber to absorb the vibrations of the motor, but since this anti-vibration rubber is made of a relatively flexible material, it cannot be washed easily. There were problems in that the motor would wobble significantly if the machine was dropped or shocked during transportation, and the V-belt that was stretched around the pulley of the motor shaft would momentarily loosen and come off.

In view of the above problems, the present invention fixes the motor directly to the washing tub to drive the agitating blades at a reduced speed, and has a simple configuration that allows for the retention of the speed reduction drive device, soundproofing of the speed reduction drive device, and lubricating grease. The aim is to provide a structure that prevents the outflow of such substances.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes an outer frame of a washing machine, which is equipped with a washing tub 2 and a dewatering receiver 3 inside.

4 is a dewatering basket rotatably installed in the dehydrating receiver 3; 5 is a dehydrating motor that rotationally drives the dehydrating basket 4; 6;
A drain hose is connected to the bottom of the washing tub 2 via a drain cock 7, and the drain hose 6 is communicated with an overflow hose 8 and a drain hose 9 on the dewatering side.

10 is a panel section arranged at the upper rear part of the outer frame 1;
It has built-in electrical components such as a time switch.

Reference numeral 11 denotes a stirring blade rotatably mounted in the bottom recess 2' of the washing tub 2. Below the stirring blade 11, there is a stirring blade whose upper surface is in close contact with the outer surface of the bottom recess 2' and whose lower surface is fixed to the motor 12. A gear case 13 is provided.

Next, to explain in detail the drive part of the motor, which is the main body of the present invention, first, a motor cooling fan 14 is attached to the shaft 12' of the hose 12, and a planetary gear for decelerating the stirring blade 11 is mounted on the same axis. The sun gear 15 of the device is fitted and the sun gear 15 is driven.

Further, two planetary gears 16 are meshed with the sun gear 15, and these planetary gears 16 are attached to two drive shafts 20 implanted in a flange 19 fitted to the intermediate portion 18 of the shaft 17 of the stirring blade 11. It is rotatably fitted to the

21 is a gear forming portion of the sun gear 15; 22 is an internal gear meshing with the two planetary gears 16 from the outside;
This internal gear 22 is cushioned and supported by the gear case 13 via a cushioning rubber piece 24 that is in sliding contact with the inner wall of the body 23 of the gear case 13.

Further, the buffer rubber piece 24 is held so as to be sandwiched between a circular rib 25 and a vertical rib 25' provided on the outer periphery of the internal gear 22.

Furthermore, on the inner wall of the body portion 23 of the gear case 13, there are two
The normal cushioning rubber piece 24 slides on the inner wall of the body 23 and moves, but the projections 26 stop the sliding and prevent the internal gear 22 from rotating. .

Reference numeral 27 denotes an engaging portion constituted by claw portions 28 provided at four locations on the peripheral wall of the gear case 13 and a convex portion 28' provided on the inner surface of the claw portion 28. The case cover 29 holds the planetary gear reduction gear and is fitted into the case cover 29 so as to be hooked onto the outer periphery of the case cover 29 which covers the lower part of the case cover 29.

The intermediate portion 18 of the shaft 17 of the agitating blade 11 is cut at two places, and a flange 19 having a hole 19' of the same shape is fitted therein.

Reference numeral 30 designates a bearing portion of the stirring blade 11 which is formed into a double cylinder shape, that is, an inverted U-shaped cross section, above the gear case 13, and a metal 31 with a flange is press-fitted inside.
The sliding portion 32 of the stirring blade shaft 17 is fitted into the inner surface of the stirring blade shaft 1 .

A thrust collar 33 is press-fitted and fixed above the sliding portion 32 of the stirring blade shaft 17, and a thrust rim 34 is interposed between the thrust collar 33 and the collar of the metal 31.

Further, above the thrust collar 33, the bearing portion 3
A washer 35 press-fitted into the inner wall of the stirring blade shaft 17 is arranged to restrict the upward thrust of the stirring blade shaft 17.

Also, two oil seals 36 and 37 are arranged on the upper part of this washer 35, and the seal part 3 of the stirring blade shaft 17
It holds water between 8 and 8.

Reference numeral 39 denotes a bushing provided so that the rotational torque of the stirring blade shaft 17 is transmitted to the stirring blade 11 without difficulty.

Usually, the stirring blade 11 is made of a soft resin material, but the bushing 39 is made of a relatively hard material.

40 is a screw for attaching the stirring blade 11 to the stirring blade shaft 17, and 41 is a ring that receives the force in the thrust direction when the stirring blade 11 is tightened.

42 is an outer peripheral portion 30' of the bearing portion 30 of the gear case 13.
The gear case 13 is provided at the bottom of the washing tub 2 with a nut that is screwed into the screw provided in the washing tub 2.

A reinforcing plate 43 is attached to the outer wall of the bottom recess 2' of the washing tub 2, and serves to reinforce the bottom recess 2' of the washing tub 2.

This reinforcing plate 43 is fastened and fixed between the washing tub 2 and the upper surface 13' of the gear case 13 by the nut 42 so as to be sandwiched therebetween via a waterproof backing.

Further, the lower end portion 45 of the stirring blade shaft 17 is connected to the sun gear 1.
It is slidably fitted to a metal 46 press-fitted into the center of the gear cutter 21 of No. 5.

Reference numeral 47 denotes an insertion hole having the same shape as the motor shaft 12', and is provided in the boss portion of the sun gear 15.

48 is a screw through hole for attaching the gear case 13 to the upper surface of the motor 12.

As described above, the washing machine drive device of the present invention consists of a stirring blade rotatably supported at the bottom of the washing tub, a motor shaft disposed coaxially with the shaft of the stirring blade, and rotation of the motor shaft. a deceleration drive device that decelerates the force and transmits it to the stirring blade; a gear case with a downward opening that houses the deceleration drive device; and a case cover that closes the lower opening of the gear case and holds the deceleration drive device. an engaging portion for engaging an outer peripheral portion of the case cover is formed on the outer peripheral wall of the gear case, and the reduction drive device includes an internal gear, a buffer rubber piece for receiving the internal gear, and an internal gear. A planetary gear that meshes with a gear,
This device is equipped with a flange that supports the planetary gear and transmits its rotational force to the shaft of the stirring blade, and a sun gear that is provided on the motor shaft so as to mesh with the planetary gear.This device is inserted into the gear case from below. The case cover not only closes the opening at one end of the gear case, but also serves to hold the deceleration drive device. Therefore, there is no need to provide a separate holding device, which reduces cost. In addition, this case cover can prevent grease, etc. applied to the reduction drive device from flowing out, and can also prevent dust from entering from the outside. The generation of noise due to the meshing of the gears can also be prevented by the sealed structure of the gear case and case cover.

In addition, the present invention is designed to insert a reduction drive device assembled with planetary gears, internal gears, etc. into a gear case from an opening at the bottom of the gear case, and to mesh the gears in a narrow gear case. In addition, by releasing the case cover and removing it, the reduction drive device can be easily taken out.
Maintenance.

Serviceability such as inspections will be improved.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a two-tub washing machine employing the drive device of the present invention, FIG. 2 is an enlarged sectional view of the same drive device, and FIG. 3 is a top view of the main parts in FIG. 2.

Claims (1)

[Scope of utility model registration request] A stirring blade rotatably supported at the bottom of the washing tub, a motor shaft disposed coaxially with the shaft of the stirring blade, and a deceleration drive device that decelerates the rotational force of the motor shaft and transmits it to the stirring blade. a gear case with a downward opening in which the reduction drive device is housed; and a case cover that closes the lower opening of the gear case and holds the reduction drive device; On the other hand, the reduction drive device includes an internal gear, a buffer rubber piece that receives the internal gear, a planetary gear that meshes with the internal gear, and a planetary gear that pivotally supports the planetary gear. The device is equipped with a flange that transmits the rotational force to the shaft of the stirring blade, and a sun gear provided on the motor shaft so as to mesh with the planetary gear, and the device is configured to be insertable into the gear case from below. Machine drive device.