Vibration Isolation Design for High-Capacity Laundry Machines
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Summary
Problems
Conventional laundry machines face limitations in capacity due to the direct transmission of drum vibrations to the tub, which restricts the enlargement of the drum size and thus the volume for treating laundry.
Innovation solutions
The laundry machine employs a suspension assembly that isolates the drum's vibration from the tub, with the tub being supported rigidly and connected using flexible members like a rear gasket to reduce vibration transmission, allowing for a larger drum diameter and increased capacity without enlarging the exterior size.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If the drum size is enlarged to increase laundry treatment capacity, then the volume for treating laundry is increased, but the drum vibration transmitted to the tub becomes more severe
Why choose this principle:
The support system is segmented into two independent parts: a rigid tub support structure and a separate suspension assembly for the drum. This segmentation allows the tub to be supported rigidly while the drum vibration is handled independently by the suspension assembly, preventing vibration transmission to the tub even when the drum is enlarged.
Principle concept:
If the drum size is enlarged to increase laundry treatment capacity, then the volume for treating laundry is increased, but the drum vibration transmitted to the tub becomes more severe
Why choose this principle:
The suspension assembly acts as an intermediary between the drum and the tub/cabinet. It buffers and isolates the drum vibration from the tub, allowing the drum to be larger without directly transmitting excessive vibration to the tub structure.
Application Domain
Data Source
AI summary:
The laundry machine employs a suspension assembly that isolates the drum's vibration from the tub, with the tub being supported rigidly and connected using flexible members like a rear gasket to reduce vibration transmission, allowing for a larger drum diameter and increased capacity without enlarging the exterior size.
Abstract
The patent application relates to a laundry machine comprising a tub to hold water therein, a drum rotatably placed in the tub, a drive assembly including a shaft (351 ) connected to the drum, a bearing housing (400) to rotatably support the shaft (351 ), a motor to rotate the shaft (351 ), and a suspension assembly to reduce vibration of the drum, which is configured that its stiffness for a displacement of the drum is greater in a left-and-right direction than in an up- and-down or front-and-rear direction.