JPS6319034Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a single-tank type dehydrating washing machine that performs washing and dehydration in the same tank. Regarding improvements to the clutch part.

(Structure of conventional example and its problems) FIG. 1 shows a typical example of this type of dehydrating washing machine, and the structure will be briefly explained.

A pulsator 2 for stirring clothes is attached to the inner bottom of the washing and dehydrating tank 1 so as to be rotatable left and right. A water tank 3 is arranged around the outer periphery and below the washing and dehydration tank 1,
It is designed to store water during washing. A bearing box 4, a driving motor 5, etc. are fixed to the outer bottom of the water tank 3. Inside the bearing box 4 are a washing shaft for rotationally supporting the pulsator 2, a dehydration shaft for rotating the dewatering and pre-washing tub 1, these bearings, and a clutch mechanism for switching between washing and dewatering operations. A brake mechanism is provided to prevent the washing and dehydration tub from rotating during washing, and a dehydration brake mechanism to stop the washing and dehydration tub during dehydration.

FIG. 2 shows a conventional example of the above-mentioned bearing box portion.

The washing and dehydrating tub 1 is rotatably supported by a dehydrating shaft 7 while its bottom is reinforced with a relatively strong flange 6 made of steel plate or the like. The dewatering shaft 7 coaxially supports the washing shaft 8 for rotation of the pulsator 2 described above.

Inside the bearing box 4 below the dehydration shaft 7, there is a brake drum 10 equipped with a gear reduction device 9 for reducing the washing rotation speed from the rotation of the motor 5 to an appropriate rotation speed, and the brake drum 10.
A gear case 11 enclosing a gear reduction device 9 and press-fitted onto the dehydration shaft 7 is provided inside. A dewatering drive shaft 13 having a washing drive shaft 12 rotatably installed therein is connected below the brake drum 10.

The above-described dehydration shaft 7, gear case 11, brake drum 10, and dehydration drive shaft 13 have a washing rotation transmission mechanism inside, and are also a dehydration shaft system that rotates the washing and dehydration tank 1 for dehydration, and the bearing box 4 and is rotatably supported by an upper bearing 14 and a lower bearing 15.

A clutch mechanism 16 is provided at the lower end of the bearing box 4 for switching the rotation of the washing drive shaft 12 during washing and the rotation of the dewatering drive shaft 13 during dehydration.

In this type of dehydrating washing machine, the cleaning power decreases when the pre-rinsing/dehydrating tank 1 rotates during washing.
A brake band 18 having a brake shoe 17 attached to the outer periphery of the brake drum 10 is operated to brake the rotation of the dewatering rotation shaft system.

Generally, the brake band 18 has a so-called barreled brake structure as shown in FIG. 3. One end 19 of the brake band 18 is fixed to the bearing box 4,
The other end 20 is pivotally supported by an operating rod 21. Operation stick 21
A tension brake spring 22 is stretched over the belt so that the brake shoe 17 of the brake band 18 comes into close contact with the brake drum 10 during washing. When the operating rod 21 is rotated in the direction shown by arrow A, it rotates around the pin 23, and the brake shoe 17 is separated from the brake drum 10, allowing so-called dehydration rotation.

In such a braking mechanism, the barred brake has a large braking torque for clockwise rotational braking as shown in Figure 3, so if it is set in the same direction as the dewatering rotation direction, the braking during dewatering will work quickly and safely. This will be the setting.

On the other hand, during washing, the pulsator 2 generally rotates left and right, so the washing and dehydration tank 1
tries to rotate left and right. At this time, since the braking force is high, rotation in the direction of dehydration rotation (ie, clockwise in FIG. 3) is prevented. On the other hand, the braking force in the counterclockwise direction is low, so in order to prevent the counterclockwise rotation, a coil part 25a of a clutch spring 25 forming the spring clutch 24 is wound around the outer periphery of the gear case cylindrical part 11a. . The coil portion 25a is coated with grease or the like to improve its slidability in the direction of rotation during dewatering with respect to the cylindrical portion of the gear case, and the other end is fixed to the bearing box 4 or the like.

In the above-mentioned spring clutch for preventing rotation of the washing and dehydration tank in the anti-dehydration direction during washing, the application of grease to improve its sliding characteristics is arranged above the spring clutch 24 in Fig. 2. The conventional method was to provide a grease reservoir patch plate 26 and apply grease to the inside. In order to improve sliding, it is necessary to apply grease to the inner circumferential surface of the coil portion 25a of the spring clutch 24, so with this method, a large amount of grease must be applied to the backing plate 26. However, if the amount of grease is increased, clutch spring 2
There was a problem in that the particles dripped downward from the outer circumference of the coil portion 25a of No. 5 and scattered onto the upper surface of the gear case 11 or, in severe cases, the outer circumferential surface of the brake drum 10, adversely affecting brake performance.

Conventionally, when the coil portion 25a of the clutch spring 25 is inserted into the gear case cylindrical portion 11a, the inner diameter of the coil portion 25a is usually set to have a slight offset from the outer diameter of the gear case cylindrical portion 11a. Since it is normal to do so, only the ends have to be slightly spread apart before insertion, which results in poor assembly work efficiency.

(Purpose of the invention) The purpose of the invention is to solve the above-mentioned problems that conventional dehydrating washing machines had, and to ensure that an appropriate amount of grease is always applied to the spring clutch without causing the grease in the spring clutch to scatter around. The purpose is to supply the clutch spring only to the sliding parts and to facilitate the assembly work of the clutch spring, thereby improving the quality and productivity of the dehydrating washing machine.

(Structure of the invention) In order to achieve the above object, the present invention provides an inclined part whose diameter decreases toward the end on the upper outer circumference of the cylindrical part of the gear case to which the dehydrating shaft of the rotating mechanism of the dehydrating washing machine is press-fitted. A pocket-shaped space is formed between the outer circumferential surface of this inclined portion and the upper inner circumferential surface of the coil portion of the clutch spring, which is wound around the outer circumference of the cylindrical portion of the gear case so as to have a width in the axial direction. It is designed to store grease in the area.

(Description of Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 4 and 5. In the figure, reference numeral 11b denotes an inclined part provided on the upper outer circumference of the gear case cylindrical part 11a, and the small diameter press-fit part 7a of the dewatering shaft 7 is press-fitted and fixed into the gear case cylindrical part 11a provided with this inclined part 11b. Then, the coil portion 25a of the clutch spring 25 is attached to the outer periphery of the gear case cylindrical portion 11a from above the dehydration shaft 7 press-fitted and fixed to the gear case cylindrical portion 11a, so that its upper end 25b is smaller than the upper end 11c of the gear case cylindrical portion 11a. Attach it so that it is located above the
A pocket-shaped space 27 is formed by the outer peripheral surface of the inclined portion 11b of the gear case cylindrical portion 11a and the upper inner peripheral surface of the coil portion 25a.

By arranging the grease reservoir part of the spring clutch part in this way, a pocket-shaped space part 2 is formed.
The grease stored in the clutch spring 7 gradually penetrates into the sliding portion between the outer circumferential surface of the gear case cylindrical portion 11a and the inner circumferential surface of the coil portion 25a of the clutch spring 25 as described below.

That is, the coil portion 25a of the clutch spring 25 is wound in the same direction as the dehydration rotation direction shown by arrow B in FIG. It drips downward and is constantly replenished from the pocket-shaped space 27.

In this case, in the case of the present invention, the stored grease exists only in the pocket-shaped space 27 on the inner circumferential side of the coil part 25a, and does not exist on the outer circumferential side of the coil part 25a, so that the grease is not present in the outer circumferential side of the coil part 25a. It will not drip down from the outer periphery of the coil or be scattered around by centrifugal force.

In addition, in the case of the present invention, when assembling the clutch spring, since the upper end of the gear case cylindrical portion 11a has a reduced diameter due to the inclined portion 11b, the gear case cylindrical portion 11a of the clutch spring 25 is
Attachment to the outer periphery is much easier than before. Furthermore, when press-fitting the small-diameter press-fitting part 7a of the dehydration shaft 7 into the gear case cylindrical part 11a, the upper end of the gear case cylindrical part 11a has a thin wall thickness due to the inclined part 11b, so the press-fitting impact force becomes a low value. Improves work efficiency.

(Effects of the invention) As is clear from the above explanation, according to the present invention, the grease for supplying to the sliding part of the spring clutch part for preventing reversal in a dehydrating washing machine as described above can be supplied separately from the conventional one. Since the required amount can be stored at the required location without the need for any parts, good sliding characteristics are always maintained, and grease is prevented from scattering due to centrifugal force or from being deposited below the outer periphery of the coil part of the clutch spring. There will be no dripping, leading to improved quality.

Further, according to the present invention, by providing the inclined portion at the upper part of the cylindrical portion of the gear case, the ease of assembling the clutch spring can be improved, and the manufacturing cost of the dehydrating washing machine can be reduced.

[Brief explanation of the drawing]

Fig. 1 is an overall longitudinal sectional view showing a conventional example of a dehydrating washing machine, Fig. 2 is a detailed sectional view of the rotating mechanism section in Fig. 1, Fig. 3 is a detailed sectional view of the brake section in the rotating mechanism section, and Fig. 4 is a detailed sectional view of the brake section in the rotating mechanism section. The figure is a detailed cross-sectional view of a bearing box showing an embodiment of the present invention, and FIG. 5 is an exploded perspective view of the spring clutch shown in FIG. 4. 1... Washing and dehydration tank, 7... Dehydration shaft, 11...
Gear case, 11a... Cylindrical part, 11b... Inclined part, 24... Spring clutch, 25... Clutch spring, 25a... Coil part, 27...
Pocket-shaped space.

Claims (1)

[Scope of utility model registration request] A washing and dehydration tank with a pulsator arranged at the bottom so that it can rotate left and right, a dehydration shaft that supports the washing and dehydration tank so that it can rotate in one direction, and a gear that has a cylindrical part in which the lower end of the dehydration shaft is press-fitted and fixed at the top. A rotating mechanism section that includes a case and a speed reducer for rotating the laundry and a brake drum connected to the gear case, a cylindrical section of the gear case, and a clutch spring wrapped around the outer circumferential surface of the cylindrical section for preventing the dehydration shaft from reversing. In a dehydrating washing machine having a spring clutch, an inclined part whose diameter becomes smaller toward the end is provided on the upper outer circumferential surface of the gear case cylindrical part, and the outer circumferential surface of this inclined part and the outer circumference of the gear case cylindrical part are arranged in the axial direction. A dehydrating washing machine characterized in that a pocket-shaped space is formed with the upper inner circumferential surface of the clutch spring wrapped so as to have a width, and sliding grease is stored in this space.