JPH0919594A - Centrifugal dehydrating/washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fixedly fasten a flange without any slackness by the use of a nut having a circular jaw part in a portion contacting the upper surface of the flange and a hollow cylindrical part to lessen a circumferential gap between a hole part in the central part of the flange and a hollow shaft of a clutch in the lower part of the jaw part. SOLUTION: When a combined washing and dehydrating tank 5 is fixedly secured, a threaded hollow shaft 16a in the outer peripheral part of a clutch 16 fixed to the lower part of an outer tank is passed through a square washer 30 and a central hole part of a support fitting flange 32 fixed to the bottom of the combined washing and dehydrating tank 5 by a bolt 31. Next, a portion contacting the upper surface of the flange hole part is provided with a circular jaw part 33a. A metal-made nut 33 provided on the lower part of the jaw part with a hollow cylindrical part 33b is screwed on the outer peripheral screw part of a hollow shaft 16a of the clutch so that the flange is vertically fixedly fastened by a propelling force due to the rotation of the nut 33. Then, the jaw part 33a of the nut 33 supports the upper surface of the flange 32 with a uniform surface pressure, so that the nut 33 can be prevented from slacking.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a centrifugal dewatering washing machine.

[0002]

2. Description of the Related Art A conventional washing / dehydrating tub has a hollow shaft threaded on the outer periphery of a clutch fixed to a support fitting at the lower part of an outer tub, and a washer having a square shape is inserted through the hollow shaft. Passing through the hole in the center of the flange of the support fitting that is fixed to the bottom with bolts, to eliminate the circumferential gap between the hole in the center of the flange and the hollow shaft through which the hollow shaft passes, to reduce run-out during rotation of the washing and dehydration tub. Washer, and a circular leaf spring with a central part removed to prevent loosening, and a nut is attached to the threaded part of the hollow shaft of the clutch. A large number of parts are passed through the hollow shaft of the clutch by the propulsive force generated by the rotation of the nut. Was fixed by tightening vertically.

[0003]

In the above conventional method, a washer and a leaf spring are inserted as an intermediary between the flange fixed to the bottom of the washing / dehydrating tub and the nut to be tightened. It causes looseness because it causes a loss. Further, the leaf spring can be pressed only partially rather than the entire surface of the washer for reducing the runout, increasing the tightening force of the nut.

An object of the present invention is to eliminate an intermediary between the flange and the nut to be tightened, and to tighten the flange with the propulsive force due to the rotation of the nut as a surface pressure to fix the flange without loosening.

[0005]

[Means for Solving the Problems] In order to make a propulsive force by rotation a uniform surface pressure, a circular collar portion is provided in a portion of the nut in contact with the upper surface of the flange, and a hole in the central portion of the flange is further provided below the collar portion. The flange is tightened and fixed only by a nut having a hollow cylindrical portion for reducing the circumferential gap between the shaft portion and the hollow shaft of the clutch.

[0006]

The circular flange of the nut supports the upper surface of the hole of the flange with a uniform surface pressure of the propulsive force generated by the rotation of the screw. Further, the lower hollow cylindrical portion eliminates a gap for facilitating the circumferential assembly of the hole of the flange and the hollow shaft of the clutch, and can reduce the swing of the washing and dewatering tub at high speed during dewatering. it can. By tightening the flange with only one part of the nut, it is possible to eliminate the tightening loss of the intermediary part and fix the washing and dehydration tub with the minimum necessary tightening torque.

[0007]

An embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, an outer tub 4 made of a synthetic resin is vibration-supported by a suspension rod 2 and a vibration-proof spring 3 inside a box-shaped outer frame 1 made of a steel plate. On the side wall of the outer tub 4, a rib 4a for attaching the suspension rod 2 and the vibration-proof spring 3 is formed. In the outer tank 4,
A washing / dehydrating tub 5 having a substantially circular cross section is provided. A number of dewatering holes 5a are provided in the side wall in the washing and dewatering tub 5.
At the center of the inner bottom of the washing and dewatering tub 5, a concave portion 5c for mounting a large-sized rotating blade 7 described later is formed. At the top of the outer tub 4,
In order to prevent the laundry from falling between the outer tub 4 and the washing / dehydrating tub 5, a tub cover 8 made of synthetic resin is fixed.
At the outer bottom of the outer tub 4, a drainage device 9 and a driving device 10 for rotating the rotary wing 7 and the washing and dewatering tub 5 are attached via a steel plate support 11. Support bracket 11
2 has a substantially box shape as shown in FIG. 2, and is fixed to the outer bottom portion of the outer tub 4 with a screw or the like. The drainage device 9 includes a drainage valve 12 connected to the inner bottom of the outer tub 4 and a drainage hose 13 connected to the drainage valve. The drain valve 12 is opened and closed by a lever 12 operated by a small cycle motor 12a.
b. The drain valve 12 is, as shown in FIG.
It attaches to the support metal fitting 11 with the screw 12c. The drain hose 13 may be the lower side wall of the outer frame 1 or the PP base 3
01 is extended to the outside of the outer frame 1.

As shown in FIG. 1, the drive unit 10 includes a washing machine motor 15, a clutch mechanism 16, and a transmission mechanism 17 for transmitting the rotation of the washing machine motor 15 to the clutch mechanism 16.
And a brake device 18 for stopping the rotation of the washing and dewatering tub 5
And a speed reduction mechanism 19 that reduces the speed of rotation of the washing machine motor 15 and transmits the rotation to the rotor 7. Motor 15 for washing machine
As shown in FIG. 2, the support bracket 1 is
Fixed to 1.

As shown in FIG. 2, the transmission mechanism 17 includes a first pulley 17a fixed to the rotating shaft of the washing machine motor 15.
And a second pulley 17 arranged below the clutch mechanism 16.
b, and a belt 17c wound around the first pulley 17a and the second pulley 17b.

As shown in FIGS. 2 and 3, the conventional washing / dehydrating tub 5 is fixed to the hollow shaft 16a, which is threaded on the outer periphery of the clutch fixed to the support fitting 11 at the lower part of the outer tub, and is square. Through the washer 30 with the center removed to wash and dehydrate the tank 5
Support bracket flange 32 fixed with bolts 31 to the bottom of the
A washer 40 for preventing a runout during rotation of the washing / dehydrating tub by eliminating a circumferential gap between the hollow shaft 32a and the hole 32a at the center of the flange through which the hollow shaft 16a passes through the central hole, and a loosening preventer. Therefore, a circular leaf spring 41 having a central portion is passed through in order, a nut 42 is attached to the threaded portion of the hollow shaft 16a of the clutch, and the washer 40 and the leaf spring passed through the hollow shaft of the clutch by the driving force of the rotation of the nut. 41 parts were fixed by tightening in the vertical direction.

Fixing of the washing and dehydrating tub 5 of the present invention is shown in FIG.
As shown in FIGS. 4 and 5, the hollow shaft 16 is formed by screwing the outer periphery of the clutch 16 fixed to the support fitting 11 at the lower part of the outer tub.
A washer 30 with a square shape is inserted through a, a hole 32a in the center of a support metal fitting flange 32 fixed by a bolt 31 is inserted into the bottom of the washing / dehydrating tub 5, and a circular shape is formed in a portion in contact with the upper surface of the flange hole. A metal nut 3 having an upper flange portion 33a and a hollow cylindrical portion 33b at a lower portion thereof.
3 is attached to the threaded portion of the outer peripheral portion of the hollow shaft 16a of the clutch, and the flange is fixed by tightening in the vertical direction by the propulsive force generated by the rotation of the nut 33. Collar 33a of nut 33
Since the upper surface of the flange 32 is directly supported with a uniform surface pressure by the propulsive force due to the screw rotation of the nut, it is possible to eliminate the tightening loss of the intervening component and reduce the looseness of the nut 33. In addition, the hollow cylindrical portion 33b, the hollow shaft 16a threaded on the outer periphery of the clutch 16 and the hole 32a at the center of the flange 32 are eliminated from the assembling gap, and the center of rotation of the washing / dehydrating tank 5 is the hollow shaft of the clutch. The correction is performed so that it coincides with the center of rotation of 16a to reduce the fluctuation of the high-speed rotation of the washing / dehydrating tub during dehydration.

[0012]

According to the present invention, the washing and dewatering tub can be fixed by a single nut, and there is no loss of tightening caused by overlapping parts or loosening due to forgetting to assemble the parts.
The number of parts is also reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a washing machine according to one embodiment of the present invention.

FIG. 2 is a plan view from the bottom of the washing machine according to the embodiment of the present invention.

FIG. 3 is a vertical cross-sectional view of a fixed portion of a conventional washing / dehydrating tub.

FIG. 4 is a vertical cross-sectional view of a fixed portion of a washing / dehydrating tub according to an embodiment of the present invention.

FIG. 5 is a plan view of the nut of the present invention.

FIG. 6 is a vertical cross-sectional view of the nut of the present invention.

[Explanation of symbols]

5 ... Washing / dehydrating tank, 16 ... Clutch, 16a ... Hollow shaft of clutch, 30, 40 ... Washer, 32 ... Flange, 3
2a ... hole of flange, 33, 42 ... nut, 33a ...
Collar portion of nut, 33b ... Hollow cylindrical portion of nut, 41 ... Leaf spring.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Osugi 1-1-1 Higashitaga-cho, Hitachi-shi, Ibaraki Hitachi Ltd. Electric Appliances Division, Taga Headquarters

Claims (1)

[Claims] 1. A washing / dehydrating tub having a support fitting flange fixed by a bottom bolt, a rotary blade rotatable at the inner bottom of the washing / dehydrating tub, and an outer rotatably enclosing the washing / dehydrating tub. The washing / dehydrating tub comprises a tub, a support device for supporting the outer tub by vibration-proofing from an outer frame, a support fitting base fixed to a lower portion of the outer tub, and a drive device fixed to the support fitting base. Is fixed to a rotary shaft having a threaded portion on the outer peripheral portion of the drive device, a metal flat plate washer and the flange are passed through, and a circular collar portion is provided on the mating surface of the flange from above, and the lower portion thereof is provided. Centrifugal dewatering washing machine characterized by tightening nuts on.