Drum washing machine
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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, which also affects the durability of the motor.
Innovation Solution
An improved motor mount structure incorporating an elastic member with a cylindrical shape and radial ribs is used between the motor bracket and the tub, reducing vibrations and noise by providing insulation and improved motor durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a 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 motor to the tub
Solution Approach 1:
An elastic member is introduced as an intermediary component between the motor bracket and the tub. This elastic member acts as a vibration-insulating intermediary that transmits the driving force while blocking the transmission of harmful vibrations and noise to the tub, thereby resolving the contradiction between secure fixation and vibration reduction.
Solution Approach 2:
The elastic member changes the mechanical parameters of the connection system by introducing elasticity and compliance. This parameter change allows the motor bracket to remain securely fixed while the elastic properties of the member absorb and isolate vibrations, preventing noise transmission to the tub.
2Ease of manufacture
If the motor is directly mounted to the tub, then the structure is simple and easy to manufacture, but the motor durability is reduced due to vibration exposure
Solution Approach 1:
The elastic member serves as a protective intermediary that shields the motor from harmful vibrations generated during operation. This intermediary layer maintains the simplicity of the overall structure while significantly improving motor durability by isolating it from vibrational stress.
3Stability of the object's composition
If the protruding length of the rib is uniform throughout, then the elastic member has consistent structural properties, but vibration reduction effectiveness is insufficient
Solution Approach 1:
The rib structure transitions from uniform to non-uniform with varying protruding lengths along the longitudinal direction. This local quality variation creates zones of different stiffness and elasticity, with longer ribs providing greater vibration absorption in critical areas, thereby enhancing overall vibration reduction effectiveness while maintaining structural stability.
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, enhancing motor durability and overall operational stability of the washing machine.
Implementation Method 1
an elastic member having a cylindrical shape and provided between the motor bracket and the tub to reduce vibrations and noise
Data Source
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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.