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

Claim 0:
1. 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 is disposed at the lower end of the dewatering shaft, and the fixing ring is disposed vertically below the washer housing.