JPH0246862Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a single-tub washing machine for general household use.

BACKGROUND TECHNOLOGY The structure of a conventional single-tub washing machine of this type will be explained with reference to FIGS. A dewatering/washing tub 5 having a rotary blade 4 at the bottom is disposed above.

A washing shaft 6 that rotates the rotary blade 4 during dewatering, and a dewatering shaft 7 that rotates the dewatering/washing tub 5.
are rotated at the same time, and during washing, only the washing shaft 6 is rotated through the reduction gear 9 by the action of the clutch mechanism 8. Reference numeral 10 denotes a brake wheel that encloses the reduction gear 9, and is a brake wheel that concentrically rotates the spin-drying/washing tub 5 in the spinning direction during washing, prevents it from rotating, and stops the rotation of the spin-drying/washing tub 5 when the spin-drying is completed. −
A keyboard band 11 is installed.

The brake wheel 10 is fitted onto the dewatering shaft 7, and a clutch spring 1 is provided above to prevent the dewatering and washing tub 5 from rotating in the opposite direction during washing.
2 is wrapped.

A rod 13 and a spring 14 attached to the end of the dehydration receiver 1 suspend and support the dehydration receiver 1 to the main body 15, and a pulley 16 and a V-belt 17 connect the motor 3 to the mechanical case 2. It transmits rotation. Further, reference numeral 18 denotes a bearing for the dewatering shaft 7 disposed on the outer frame of the mechanical case 2. A hole 2' is provided in a part of the mechanical case 2 so that the brake band 11 can be replaced.

Problems to be Solved by the Invention In such a conventional configuration, when the brake wheel 10 rotates at high speed during dehydration, frictional heat is generated between the brake wheel 10 and the clutch spring 12, and even if grease
Even if 9 is applied, if used for a long period of time, it will scatter and the brake wheel 10 and clutch spring 12 will come into direct contact.
Wear of the brake wheel 10, breakage of the clutch spring 12, etc. occur, and abnormal noises occur during dehydration. During washing, the dehydration/washing tub 5 rotates together with the rotary blade 4.
There was a risk that the motor 3 would catch fire due to the application of an excessive load.

In addition, the scattered grease 19 can be seen on the brake band 11.
There was also a risk that the brakes would become inoperable due to adhesion to the brakes. Furthermore, the mechanical case 2 at the bottom of the bearing 18
Since there is a void inside, there is a risk that dust, etc. that invaded through the hole 2' may flow into the bearing 18 and cause seizure with the dewatering shaft 7, which is heated due to friction.

The present invention solves these problems by preventing the grease applied between the brake wheel and clutch spring from scattering, thereby reducing the frictional heat generated by the rotation of the brake wheel and the clutch spring. At the same time as preventing the occurrence of
The purpose is to maintain the bearing performance and to prevent dust from entering the bearing.

Means to Solve the Problem In order to solve this problem, the present invention is to attach a foamed sponge to the outer periphery of the clutch spring coated with grease, and the upper end of the foamed sponge is made into a large diameter part and placed close to the bearing. be.

Effect With this configuration, some of the grease applied between the brake wheel and clutch spring is liquefied by the heat generated by the rotation of the brake wheel during dehydration, and is quickly absorbed by the foam sponge, but after the dehydration is completed, Depending on the time the grease is left to stand, the cooled grease becomes viscous again and adheres to the outer periphery of the clutch spring.

As a result, the grease that repeats the heating-cooling cycle circulates between the clutch spring and the foam sponge, so the grease does not scatter and is constantly coated inside the clutch spring, avoiding friction with the brake wheel. I can do that. Furthermore, by making the upper part of the foam sponge large in diameter and arranging the upper end close to the bearing, it is possible to prevent dust from entering the bearing.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2. A dehydration receiver 23 is suspended from the upper part of the main body 20 via a rod 21 and a spring 22, and a rotary blade 24 is installed at the bottom thereof. A dewatering/washing tub 25 having a dehydration/washing tub 25 was provided. The speed of the rotary blade 24 and the dewatering/washing tub 25 is changed by a mechanical case 26 provided with a hole 26', and is driven by a motor 29 via a pulley 27 and a belt 28. During dewatering, a washing shaft 30 that rotates a rotary blade 24 and a dehydrating shaft 31 that rotates a dewatering/washing tub 25 are rotated simultaneously, and during washing, only the washing shaft 30 is rotated through a reduction gear 33 by the action of a clutch mechanism 32. To describe the structure specifically, the brake wheel 34 is a case that encloses the reduction gear 33 fitted to the dewatering shaft 1, and is concentric and has spring properties, and is used during washing and Brake wheel 3 at the end of dehydration
4, a brake band 35 is provided to stop the rotation of the spin-drying/washing tub 25.
Since it is not possible to stop the rotation of the spin-drying/washing tub 25, and it is not possible to prevent the spin-drying/washing tub 25 from rotating together when the rotary blades 24 rotate in the opposite rotation direction for spin-drying during washing, the brake wheel cannot be used. A clutch spring 36 is wound around the upper part of the clutch spring 34.

The clutch spring 36 is a close contact spring, and due to its winding direction, the inner diameter expands in the dehydration rotation direction, and decreases in the dehydration rotation direction, so that the clutch spring 36 has a close connection with the brake wheel 34. The tightening margin is controlled, and the dehydration and washing tub 25
It is possible to prevent the dehydration from rotating in the opposite rotation direction.

Reference numeral 37 denotes a substantially cylindrical foamed sponge having a large-diameter portion 40 at its upper portion, which is loosely fitted around the outer periphery of the clutch spring 36, and the upper large-diameter portion 40 is
It has the same outer diameter as the bearing 38 of the dewatering shaft 31 disposed on the outer frame of the mechanical case 26, and its upper end is disposed close to the bearing 38.

Further, 39 indicates the area between the clutch spring 36 and the brake wheel 34 and the area between the clutch spring 36 and the brake wheel 34.
6 and the foamed sponge 37.

In the above configuration, the clutch spring 3 is heated due to the rotation of the brake wheel 34 during dehydration.
A part of the grease 39 becomes liquid between the foam sponge 37 and the brake wheel 34.
However, as the water is left to stand for a while after dehydration, it cools down, becomes viscous again, and adheres to the outer periphery of the clutch spring 36. Further, since the clearance between the clutch spring 36 and the foamed sponge 37 serves as a reservoir for the grease 39, the grease 39 does not run out.

Note that since the upper end of the large diameter portion of the foamed sponge 37 is located close to the bearing 38 with the same diameter, the hole 2
Dust that has entered from 6' cannot enter the bearing 38 and will not seize with the dewatering shaft 31. Furthermore, if the large-diameter upper portion of the foamed sponge 37 is used as a reservoir for the grease 39, it is also possible to supply the grease 39 to the bearing 38.

Effects of the invention As described above, according to the invention, due to the absorbing action of the foam sponge placed around the outer periphery of the clutch spring,
This prevents liquid grease from scattering due to the rotational heat of the brake wheel, and at the same time allows the viscous grease to be reused after cooling, and the clearance between the foam sponge and clutch spring can be used as a grease reservoir. As a result, the clutch spring and brake wheel can always be smoothly slid without running out of grease, and can be used for a long period of time. It is also possible to prevent deterioration of brake performance due to grease adhesion to the brake band. Furthermore, by locating the large diameter part of the upper part close to the bearing, it is possible to prevent seizure caused by dust entering the bearing, and by using the large diameter part of the upper part as a grease reservoir, it is not necessary to replenish the grease for a longer period of time. The practical effect is great.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the main part of a mechanical case of a single-tub washing machine according to an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of the same-tub washing machine, and Fig. 3 is a conventional single-tub washing machine. FIG. 4 is a longitudinal sectional view of the same tub type washing machine. 26...Mechanical case, 26'...hole, 3
0...Washing shaft, 31...Dehydration shaft, 3
4... Brake wheel, 35... Brake band, 36... Clutch spring, 37... Foamed sponge, 38... Bearing, 39... Grease, 40
...The upper diameter is large.

Claims (1)

[Scope of utility model registration request] Brake fitted to the dehydration shaft of the dehydration/washing tub
a clutch spring wrapped around the brake wheel and coated with grease to prevent rotation of the spinner and washing tub during washing; a foam sponge attached to the outer periphery of the clutch spring; The brake band provided on the outer periphery constitutes a transmission control unit that transmits the motor drive to the dewatering shaft and the washing shaft. The foam sponge includes a bearing disposed to pivotally support a dewatering shaft and a washing shaft, and the foamed sponge has an upper portion having a larger diameter, the larger diameter portion of the upper portion having approximately the same diameter as the outer diameter of the bearing, and an upper end portion. A single-tank washing machine in which the bearing is placed close to the bearing.