JPH077897Y2 - One-tank washing machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a one-tub type washing machine used in general households, and more particularly, to an interlocking structure of a switching device for switching between transmission of a washing tub for dehydration and a stirring blade. is there.

2. Description of the Related Art FIG. 5 shows a conventional one-tub washing machine of this type. That is, the dehydration and washing tub 2 is rotatably provided in the water receiving tub 1, and the water receiving tub 1 and the dehydration and washing tub 2 are supported by the support bar 3.
It is suspended and supported by the washing machine body 4. This washing machine body 4
An opening 5a is provided in the central portion of the top plate 5 for covering the upper part of the above so as to put clothes and the like into the washing tub 2. The opening 5a is covered with a lid 6 that can be opened and closed. A stirring blade 7 for stirring clothes is rotatably provided at the inner bottom portion of the dehydration / washing tub 2, and the stirring blade 7 and the dehydration / washing tub 2 are switched by a switching device 8 to be rotationally driven. This switching device 8 uses the rotating force of the motor 9 to wash and rinse the stirring blade 7
To the washing and washing tub 2 during dehydration. A solenoid valve 10 which is a switching drive means provided in the lower part of the water receiving tank 1 is connected to a cock 11, and a transmission switching clutch sprig 14 is operated via a switching lever 12 provided in a switching device 8. The stirring blade 7 and the dehydration and washing tub 2 can be switched. The clutch spring 14 is
The clutch boss 15 (FIG. 6) having one end locked therein is provided, and the switching lever 12 moves the clutch boss 15 to switch the engaged state. Clutch boss
A cutout 15a is provided at the lower end of 15 and an elastic body is formed in this cutout 15a.
The protrusion 21a of 21 is inserted and attached to the lower end of the clutch boss 15. The elastic body 21 receives the clutch spring at the step portion 21b, and prevents the hitting sound of the clutch boss 15 and the clutch spring from being generated even if the vibration of the clutch boss 15 occurs when the transmission torque changes.

Problems to be Solved by the Invention In such a conventional configuration, the clutch boss 15 of the elastic body 21 is
If it is not attached to the pulley 22, the elastic body 21 comes into full contact with the pulley 22, and the frictional resistance hinders the rotation of the pulley 22 and causes abnormal noise.

The present invention solves the above-mentioned problems, and an object thereof is to prevent abnormalities from occurring even if the pulley and the elastic body come into contact with each other.

Means for Solving the Problems In order to achieve the above object, the present invention provides a water receiving tub that rotatably accommodates a spin-drying and washing tub, and a stirring blade that is rotatably arranged on the inner bottom of the spin-drying and washing tub. A switching device for switching the rotation drive transmission to the dehydration / washing tub or the stirring blades by a switching drive means arranged at the lower portion of the water receiving tub is provided, and the switching device includes the rotational force of the metal connected to the pulley to the dehydration shaft. In order to transmit, a clutch spring wound around the metal and dehydration shaft, a clutch boss that encloses the clutch spring and locks one end of the metal-side clutch spring, and a clutch boss that engages with the clutch boss. A clutch switching lever for rotating the boss is provided, and a plurality of notches are formed at the lower end portion of the clutch boss, and an annular elastic member to be attached to the notch. The body is located on the bottom surface and the side surface on the lower end side of the clutch spring to serve as a receiving portion in the thrust and radial directions of the clutch spring, and the lower end portion of the elastic body is attached to the clutch boss when the elastic body is attached to the clutch boss. The height is set so as not to project from the lower end of the elastic body, and the cross section of the tip of the lower end of the elastic body is formed into a substantially triangular shape.

Action With this configuration, even if the elastic body is misaligned with the clutch boss and comes into contact with the pulley, it does not make surface contact because the tip is triangular and frictional resistance can be minimized. Therefore, the rotation of the pulley is not hindered, and the occurrence of abnormal noise can be prevented.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

In FIG. 3, 10 is an electromagnetic valve which is an opening / closing driving means provided in the lower part of the water receiving tank 1, and is interlocked with a switching lever 12. The switching lever 12 is rotatable by a spring 13 and its tip is engaged with a clutch boss 30. I am fit. The clutch boss 30 encloses the clutch spring 14 as shown in FIG.
One end is locked. The clutch spring 14 is a spring having a close contact difference, and is mounted on a metal 20 connected to a dehydration shaft 16 and a washing shaft 19. In FIGS. 1 and 2, reference numeral 31a denotes a plurality of notches formed in the lower portion of the clutch boss 30, the inner diameter projecting rib 31a of the elastic body 31 is inserted into the notches 31a, and the circumferential rib 31b is the clutch. It is attached around the boss 30. The elastic body 31 has an inner diameter protruding rib 31a protruding above the inner bottom portion 30b of the clutch boss 30, and a lower end thereof is set above the lower end of the clutch boss 30, and the upper side is higher than the inner wall rib 30c of the clutch boss 30. Is also formed as a stepped rib with a small diameter. Further, the lower end of the circumferential rib 31b is formed in a substantially triangular shape.

The operation will be described with the above configuration. When the electric current to the motor 9 is cut during the intermittent dehydration operation and the time difference braking, and the transmission torque changes, that is, the rotation of the metal 20 becomes smaller than the rotation of the dehydration shaft 16, and the rotation difference causes the metal 20 and the dehydration shaft to rotate. When the lower end side (the metal 20 side) of the clutch spring 14 around which both 16 and 16 are wound vibrates, the elastic body 31 prevents the clutch spring 14 from colliding with the inner surface of the clutch boss 30.
It is possible to prevent the hitting sound from 14
Since 31 is attached to the lower end of the clutch boss 30 by facing only the lower end side of the clutch spring 14, the attachability of the elastic body is enhanced and the assemblability is improved. Also an elastic body
Since the lower end of the inner diameter protruding rib 31a of 31 is set above the lower end of the clutch boss 30 and the tip of the circumferential rib 31b is formed in a substantially triangular shape, the elastic body 31 can be inserted into the clutch boss 15. Even if the pulley 22 and the elastic body 21 come into contact with each other by misalignment,
Since the circumferential rib 31b only comes into line contact, it does not hinder the rotation of the pulley 22, and it is possible to prevent the generation of abnormal noise due to the displacement. Further, the clutch boss 30 and the lower end 23 of the elastic body 31 can be used as a grease reservoir, and the pulley 22
The contact resistance with can be minimized.

Advantageous Effects of Invention According to the present invention, as is apparent from the above-described embodiments, the pulley-side shape of the elastic body is formed so as not to cause surface contact, so that abnormal rotation and abnormal noise can be prevented. In addition, the clearance after the clutch boss and the elastic body are inserted can be used as a grease reservoir, the contact resistance with the pulley can be minimized, and the contact resistance with the elastic body pulley is increased. It is possible to prevent the dehydration tub from suddenly starting because the switching lever is released due to the pulley and the clutch boss rotating together, and safety can be improved. Further, since the noise can be reduced by the extremely simple structure in which the elastic body is arranged on the lower end side of the clutch spring, the noise can be reduced while improving the assembling property.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an elastic body and a clutch boss of a one-tub washing machine according to an embodiment of the present invention, and FIG. 2 is a sectional view of the elastic body and a clutch boss of the same-tub washing machine. FIG. 3 is a plan view of the switching device for the same tub type washing machine, FIG. 4 is a side sectional view of the switching device for the same tub type washing machine, and FIG. FIG. 6 is a sectional view of an elastic body and a clutch boss of the same-tub washing machine. 1 ... Water receiving tank, 2 ... Dewatering and washing tank, 7 ... Stirring blade, 8
...... Switching device, 10 ... Solenoid valve, 12 ... Switching lever, 14 ...
… Clutch spring, 30 …… Clutch boss, 30a ……
Notch, 31 …… elastic body, 31a …… protruding rib, 31b …… circumferential rib.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Mori 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-58-152588 (JP, A) JP-A-50-60058 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A water receiving tub in which a spin-drying / washing tub is rotatably accommodated, a stirring blade rotatably disposed at the inner bottom of the spin-drying / washing tub, and a rotational drive transmission to the spin-drying / washing tub or stirring wing. A switching device for switching by means of a switching drive means arranged at the lower part of the water receiving tank, wherein the switching device transmits the rotational force of the metal connected to the pulley to the dehydration shaft,
A clutch spring wound around the metal and dewatering shaft, a clutch boss that encloses the clutch spring and locks one end of the metal-side clutch spring, and engages with the clutch boss to rotate the clutch boss. A clutch switching lever is provided, a plurality of cutouts are formed in the lower end of the clutch boss, and an annular elastic body attached to the cutouts is positioned on the bottom surface and side surface of the lower end side of the clutch spring. A thrust and radial direction receiving portion is set, and the lower end of the elastic body is set to a height such that it does not project from the lower end of the clutch boss when the elastic body is mounted on the clutch boss. One-tub washing machine with a substantially triangular cross section.