Washing machine

Patent metadata

Field	Value
Publication number	US-11293129-B2
Application number	US-202016743348-A
Country	US
Kind code	B2
Filing date	Jan 15, 2020
Priority date	Jan 16, 2019
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

A washing machine of the present disclosure includes a drive shaft rotating a pulsator, a dehydration shaft connected to a washing tub, a magnetic core surround a periphery of a solenoid, an armature lifted by an attraction force between the armature and the magnetic corea lever having a support point of which a position is fixed with respect to the dehydration shaft and an operation end located at a point spaced by a predetermined distance from the support point, a clutching coupler shaft-coupling the drive shaft and the dehydration shaft to each other at a lowered position, and shaft-decoupling the drive shaft and the dehydration shaft from each other at a lifted position, an elastic member pressing the clutching coupler downward, a guide groove guiding a relative movement of the operating end with respect to the clutching coupler, and a lowering restriction section disposed in the guide groove.

First claim

What is claimed is:

1. A washing machine comprising:
a washing tub accommodating laundry and rotatably disposed;
a pulsator rotatably disposed in the washing tub;
a drive shaft rotating the pulsator;
a dehydration shaft connected to the washing tub and having a first hollow through which the drive shaft passes;
a solenoid generating a magnetic field when a current is applied;
a magnetic core surrounding a periphery of the solenoid;
an armature lifted by an attraction force between the armature and the magnetic core when a current is applied to the solenoid;
a clutching coupler having a second hole through which the dehydration shaft passes, wherein the clutching coupler is lifted and lowered along the dehydration shaft integrally with the armature, shaft-couples the drive shaft and the dehydration shaft to each other at a lowered position, and shaft-decouples the drive shaft and the dehydration shaft from each other at a lifted position lifted from the lowered position according to the lifting of the armature;
a lever having a support point of which a position is fixed with respect to the dehydration shaft and an operation end located at a point spaced by a predetermined distance from the support point;
an elastic member pressing the clutching coupler downward;
a guide groove provided on an inner peripheral surface of the clutching coupler defining the second hole and guiding a relative movement of the operating end with respect to the clutching coupler when the clutching coupler is lifted or lowered; and
a lowering restriction section disposed in the guide groove and caught by the operating end so that the clutching coupler is not lowered in a state where the clutching coupler is located at the lifted position and a current is not applied to the solenoid.

2. The washing machine of claim 1 , wherein a predetermined point of the lever between the support point and the operating end is pressed by an upper end of the elastic member and the operating end presses a bottom of the guide groove by a moment generated based on the support point.

3. The washing machine of claim 2 , wherein the dehydration shaft includes a tubular insertion hole extending horizontally, and
the lever includes a vertical portion configured to extend vertically, a support portion configured to be bent at an upper end of the vertical portion to extend horizontally in a first direction and to be inserted into the insertion hole, and an operation portion configured to extend horizontally in a second direction opposite to the first direction at a lower end of the vertical position to constitute the operating end.

4. The washing machine of claim 3 , wherein the elastic member is disposed below the support portion, and
an upper end of the elastic member presses the support portion upward.

5. The washing machine of claim 1 , wherein the lowering restriction section includes a locking groove configured to be formed to be open downward such that the operating end is inserted from below, and
the washing machine further comprising:
a separation guide section configured to be located in the guide groove and to guide turning of the operating end about the support point so that the operating end is separated from the locking groove when the clutching coupler is lifted.

6. The washing machine of claim 5 , wherein the guide groove includes a first guide section configured to guide the operating end guided by the separation guide section to a first point located above the lowering restriction section when the clutching coupler is lowered.

7. The washing machine of claim 6 , wherein the guide groove further includes a second guide section configured to guide the operating end located at the first point to a second point located below the locking groove when the clutching coupler is lifted and a third guide section configured to guide the operating end located at the second point to the locking groove when the clutching coupler is lifted.

Assignees

• Lg Electronics Inc

Inventors

• Lee Jeonguk
• Yoon Jihyun
• Kim Sechang

Classifications

• F16D11/14

  with clutching members movable only axially (F16D11/02, F16D11/08 take precedence) · CPC title

• D06F23/02

  and rotating or oscillating about a horizontal axis · CPC title

• D06F37/40 Primary

  for driving the receptacle and an agitator or impeller, e.g. alternatively {(D06F37/304, D06F37/308 take precedence)} · CPC title

• F16D1/112

  the interengaging parts comprising torque-transmitting surfaces, e.g. bayonet joints · CPC title

• D06F33/40

  of centrifugal separation of water from the laundry · CPC title