JPH0435689A - Braking device for dehydration washing machine - Google Patents

Abstract

PURPOSE:To prevent the occurrence of both braking sound and corotation sound by forming the brake band sliding surface of a brake wheel into a hourglass shape wherein the brake wheel is coupled in a dehydrating shaft and is covered with dynamic friction reducing material such as zinc and the like at its surface. CONSTITUTION:At the early stage of operating a washing machine, a brake wheel 10 rubs against a brake band 11 at both of the upper and lower ends of them wherein both dynamic friction reducing material 27 such as zinc and the like on the surface of the brake wheel 10 and the brake band 11 are simultaneously worn away, the brake wheel 10 thereby starts widening its sliding range from both of the upper and lower ends of it to its center section in order. Accordingly, dynamic friction reducing material 27 over the brake wheel 10 also begins to be worn away from both of the upper and lower ends of it in order, dynamic friction reducing material can thereby remain therein even for a long time in use. By this constitution, a state that a dynamic friction factor is being cut, can be continued, and the occurrence of both braking sound at the time of the completion of dehydration and corotation sliding sound by a dehydrating and washing tank 5 at the time of washing, can thereby be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a brake device for a dehydrating washing machine equipped with a dehydrating washing tub and rotary blades.

BACKGROUND OF THE INVENTION In general, this type of dehydrating washing machine is equipped with a dehydrating washing tub and a rotary X, and these machines rotate together, or only the rotary shell is rotated to perform the required dewatering and washing.

The structure of a conventional dehydrating washing machine of this type will be explained with reference to FIGS. 2 and 3. In the figure, reference numeral 1 indicates a water receiving tank, and a clutch switching device 2 and a motor 3 are arranged below the cage.

Further, inside the water receiving tank 1, a dewatering/washing tub 6 having rotary blades 4vi at the bottom is disposed. In addition, a washing shaft 6 that rotates the rotary blade 4 and a dehydrating shaft 7 that rotates the dehydrating and washing 1116 are concentrically combined, and a switching clutch 8
Through the gear 9, the rotation of the washing shaft 6 and the dewatering shaft 7 can be changed to simultaneous rotation, or the rotation of the washing shaft 6 alone can be switched.

A brake wheel 10 encloses the gear 9, and has a brake band 11 concentrically arranged thereon.

This brake band 11 functions to prevent the spinning/washing tub 5 from rotating together during washing, and to stop the rotation of the spinning/washing tub 6 when spin-drying is completed. The above-mentioned dehydration shirt) 7t is connected to the upper part of the brake wheel/l/10, and the gear case 12 is fitted to the lower part of the bearing case A14 in which the bearing A13 is inserted, and the bearing case B1e in which the bearing B16 is inserted.
It is supported by a screw. Said brake band A/101
A Cij backing plate 17 is fitted, and an oil seal lvIBf for sealing the dehydration shaft 7 is provided above the bearing A13.

A brake lever is rotatably connected to the brake band 11 by 19 feet via a stepped pin 2ot. One end of the coil spring 21 is engaged with the bearing case B16, and the other end of the coil spring 21 is engaged with the 7'' V-cleaver 49, thereby creating an adhesion force between the brake band 11 and the brake band 11/l/10. The coil spring 21 is supported by passing through a shaft 22 which has both ends fitted in a hole A16a and a hole B16bVc formed in the bearing case B1e.The shaft 22 is
In order to prevent removal from the hole A16a, the large diameter portion 22a1
It is shaped like this.

A pulley 23 is connected to the clutch switching device 2.
! The rotation of the motor 3 is transmitted via the lever 4. 26 in the figure is Rondo, water tank 1
Outside iF? ! It is suspended and supported on 26.

The sliding surface of the brake wheel 10 with the brake band 11 is coated with zinc, etc., which reduces the coefficient of dynamic friction, in order to prevent the generation of brake noise at the end of spin-drying and the joint sliding of the spin-drying/washing tub during washing. surface treatment.

Problems to be Solved by the Invention In such a conventional configuration, the brake wheel 1o and the brake band 11 are constantly sliding on the entire surface, so that the brake wheel 1o and the brake band 11 are constantly sliding on the entire surface. If this occurs, there is a risk that a sliding noise will be generated when the spin-drying end brake is applied and when the spin-drying/washing tub 5 rotates together during washing.

The invention is to solve this problem by applying a surface treatment layer such as zinc on the brake band μ for a long period of time.
The purpose is to maintain the brakes and prevent the occurrence of brake noise and co-rotation.

Means for Solving the Problems In order to achieve the above objects, the present invention includes a dewatering shaft connected to a dewatering/washing tub, a dehydrating shaft fitted onto the dehydrating shaft, and a dynamic friction reducing material such as zinc attached to the surface. a brake wheel arranged concentrically around the outer periphery of the brake wheel, and a brake band that is in close contact with the brake wheel during washing and released during dehydration; It is formed into a shape.

Operation The brake device for the dehydrating washing machine of the present invention having the above-mentioned structure causes the brake wheel and the brake band to be in close contact with each other at both the upper and lower ends, thereby completely preventing sliding on the entire surface.

As the brake band wears, the sliding range gradually expands to the center of the brake wheel.The material that reduces the coefficient of dynamic friction, such as zinc, attached to the sliding surface of the brake wheel must be maintained over a long period of time. Become.

Example An embodiment of the present invention will be described below with reference to FIG.

Note that the same members as those in the conventional configuration are designated by the same reference numerals, and explanations thereof will be omitted.

The characteristic structure of this embodiment is in the brake band, and the brake band sliding surface of the brake wheel/l/10 is made of zinc or the like. The surface is treated with a friction coefficient reducing material 27, and the sliding surface is formed into a so-called drum shape with a concave center, so that the brake band 11 comes into contact with both the upper and lower ends. There are n.

Next, the operation of the configuration of this embodiment will be explained.

At the beginning of the washing machine operation, the sliding of the brake wheel 1o and the brake band 11 occurs at both the upper and lower ends, the wear of the dynamic friction thread count reducing material 27 such as zinc on the surface of the flake wheel (flake wheel) and the wear of the brake band 11. Since the brake wheels 10 move almost simultaneously, the sliding range of the brake wheel 10 gradually expands from the upper and lower ends toward the center. Therefore, the dynamic friction reducing material 27 of vlo also
Next, as it wears out, the dynamic friction reducing material can remain even after long-term use, and the state in which the coefficient of dynamic friction is completely reduced continues, causing the brake noise at the end of spin-drying and the noise during washing. It is possible to prevent the co-rotating sliding noise of the dewatering and washing 1116 from occurring.

In addition, at the initial stage, the upper and lower ends of the Plaque Wheel/L/10 are sliding and the sliding range is narrow, but since surface pressure is applied to both the upper and lower ends, this occurs due to an abnormal increase in surface pressure due to so-called line contact. It is also possible to prevent the squeaking sound that occurs.

Effects of the Invention As described above, the present invention can maintain the sliding state of the brake band μ and the 7 rake band for a long period of time with the coefficient of dynamic friction always being reduced, thereby preventing the generation of brake noise and reducing noise. In terms of quality, it is possible to obtain excellent quality.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of a brake device including a clutch unit showing an embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view of a dehydrating washing machine, and Fig. 3 is a longitudinal cross-sectional view of a conventional brake device including a clutch unit. It is. 6... Dehydration/washing tub, 7... Dehydration shaft, 1o... Brake wheel, 11...
...Brake band, 27...a Single vibration coefficient reduction material. Name of agent: Patent attorney Shigetaka Awano et al.

Claims (1)

[Claims] A dewatering shaft connected to a dewatering/washing tub, a brake wheel fitted to the dehydrating shaft, and a brake band disposed concentrically around the outer circumference of the brake wheel, which is in close contact with the brake wheel during washing and released during dewatering. A brake device for a dehydrating washing machine, comprising: applying a dynamic friction coefficient reducing material to the brake band sliding surface of the brake wheel, and forming the brake band sliding surface into a substantially drum shape.