Patent ID: 11913158
Assignee: LG ELECTRONICS INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC D  H  F | IPC D  F  H

Claim 19:
20. A laundry treatment apparatus comprising:
a case;
a tub disposed inside the case and configured to accommodate washing water;
a drum rotatably disposed inside the tub and configured to accommodate laundry;
a pulsator disposed inside the drum and configured to rotate based on receiving driving force; and
a driver configured to supply the driving force for rotating the drum and the pulsator,
wherein the driver comprises:
a driving motor comprising a stator and a rotor,
a bearing housing disposed at a lower portion of the tub,
a dewatering shaft having a lower end disposed adjacent to the rotor and an upper end connected to the drum, the dewatering shaft defining a through-hole therein,
a coupler configured to selectively connect the dewatering shaft to the rotor based on moving upward and downward along an outer circumferential surface of the dewatering shaft,
a washing shaft disposed inside the through-hole of the dewatering shaft and configured to rotate the pulsator, the washing shaft having a lower end connected to the rotor and an upper end connected to the pulsator, and
an anti-friction member disposed between the dewatering shaft and the washing shaft,

wherein the washing shaft defines a fixing groove that is recessed inward from an outer circumferential surface of the washing shaft and extends along a circumferential direction,
wherein the driver further comprises:
a fixing ring disposed in the fixing groove, wherein an outer circumferential surface of the fixing ring radially protrudes outward relative to the outer circumferential surface of the washing shaft,
a washer housing disposed between the anti-friction member and the fixing ring, and
a wave washer accommodated inside the washer housing, and

wherein the washer housing comprises:
a first portion in contact with the anti-friction member,
a second portion in contact with the fixing ring, and
a connecting portion that connects the first portion to the second portion and covers an outer circumferential surface of the wave washer.