Drum Washer Motor Mount Structure for Vibration Isolation
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Solution Overview
Problem
Drum washing machines experience vibration and noise issues due to the transmission of rotational forces from the driving device to the tub, which affects motor durability and overall performance.
Innovation Solution
An improved motor mount structure incorporating an elastic member with a cylindrical shape and radial ribs between the motor bracket and the tub, designed to absorb vibrations and reduce noise, featuring a rib structure that increases in length towards the center and includes flanges with protruding portions for enhanced vibration insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motor bracket is directly coupled to the tub using fastening members, then the motor is securely fixed to the tub, but vibration and noise are transmitted from the drum rotation to the tub and motor
Solution Approach 1:
An elastic member is introduced as an intermediary component between the motor bracket and the tub. This elastic member serves as a mediator that transmits the necessary mechanical connection while simultaneously isolating vibration and noise, preventing harmful factors from propagating through the structure.
Solution Approach 2:
The elastic member is installed in advance between the motor bracket and the tub to provide cushioning against upcoming vibrations and shocks. This pre-positioned cushioning element absorbs and dampens vibration energy before it can be transmitted to the tub and surrounding structures, reducing noise and protecting components.
2Strength
If the motor bracket is rigidly mounted to the tub, then the motor is firmly secured, but the durability of the motor is reduced due to vibration transmission
Solution Approach 1:
The elastic member acts as a protective intermediary that decouples the motor bracket from the rigid tub structure. This intermediary layer maintains the necessary mechanical strength for secure mounting while filtering out harmful vibrations, thereby extending motor durability without compromising mounting strength.
Solution Approach 2:
The elastic member changes the mechanical parameters of the mounting system by introducing compliance and damping characteristics. This transforms the rigid mounting connection into a semi-compliant connection that maintains sufficient strength while reducing vibration transmission, thereby improving motor durability.
3Object-affected harmful factors
If a simple elastic member is used between the motor bracket and tub, then vibration insulation is provided, but the vibration insulation effectiveness is insufficient
Solution Approach 1:
The elastic member is segmented into multiple functional zones with different rib heights arranged in a specific pattern. This segmentation allows different portions of the elastic member to handle different frequencies and directions of vibration, enhancing overall vibration insulation effectiveness through distributed damping.
Solution Approach 2:
The elastic member features non-uniform rib heights where certain regions have taller ribs and others have shorter ribs, creating local variations in stiffness and damping properties. This local quality differentiation optimizes vibration insulation by providing targeted damping in specific areas where vibration transmission is most problematic.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces vibrations and noise, improving motor durability and operational stability by isolating the tub and motor bracket, leading to a quieter and more reliable washing machine operation.
Implementation Method 1
an elastic member having a cylindrical shape and disposed between the motor bracket and the tub
Implementation Method 2
an elastic member having a cylindrical shape and disposed between the motor bracket and the tub
Data Source
AI summary
Disclosed herein is a drum washing machine having an improved motor mount structure. The drum washing machine includes a tub having a coupling part; a drum rotatably installed in the tub; a motor bracket installed at the coupling part; and an elastic member having a cylindrical shape and disposed between the motor bracket and the tub, wherein the elastic member comprises a rib protruding in a radial direction from the inner circumferential surface of the elastic member, and the rib has the longest protrusion at a longitudinal center of the elastic member.