Washing Machine Drum Structure for Uniform Rolling and Lifter Strength
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Solution Overview
Problem
The existing drum-type washing machines face issues with the strength of lifter installation sections being compromised during the rolling process to form a cylindrical rotating tub body, leading to irregular deformation and reduced washing efficiency due to the alternation of concave-convex and lifter installation sections on the inner surface.
Innovation Solution
The introduction of reinforcement sections along the lifter installation areas to enhance the structural strength, ensuring uniform deformation and maintaining the cylindrical shape, which includes forming recessed and protruded portions on the rotating tub body to support the lifter installation sections and prevent excessive deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If concave-convex sections and lifter installation sections are alternately installed on the inner peripheral surface of the rotating tub body, then washing performance is improved due to the concave-convex structure, but the strength of the lifter installation section is decreased due to installation holes
Solution Approach 1:
The patent applies local quality by providing reinforcement sections specifically at the lifter installation sections where strength is needed, while maintaining the concave-convex structure in other areas for washing performance. This localized reinforcement allows different parts of the rotating tub body to have different properties optimized for their specific functions.
2Ease of manufacture
If the rotating tub body is manufactured by rolling a plate with concave-convex structure and lifter installation section, then the desired functional structure is achieved, but the lifter installation section having relative low strength is extremely deformed as compared with the concave-convex structure
Solution Approach 1:
The reinforcement sections are designed in advance to counteract the expected deformation during the rolling process. By providing these reinforcing elements before manufacturing, the patent prevents the lifter installation sections from deforming excessively during the rolling operation, ensuring uniform deformation across the entire rotating tub body.
3Strength
If reinforcement sections are added to strengthen lifter installation sections, then structural integrity is improved, but device complexity increases
Solution Approach 1:
The reinforcement sections are merged with the existing plate structure of the rotating tub body, forming an integrated design. Rather than adding separate complex components, the reinforcement is incorporated directly into the plate itself, strengthening the lifter installation sections while maintaining manufacturing simplicity and avoiding excessive complexity.
Data Source
AI summary
A cylindrical rotating tub body and a drum-type washing machine having the same, in which the rotating tub body is formed by rolling a plate such that both ends of the plate are connected to each other. The washing machine includes a cylindrical rotating tub body and a plurality of lifters, which are spaced apart from each other on an inner peripheral surface of the rotating tub body. The rotating tub body includes lifter installation sections on which a plurality of lifters are installed, concave-convex sections having a plurality of concave-convex parts and being installed between the lifter installation sections, and reinforcement sections to reinforce the strength of the lifter installation sections. The lifter installation sections having a strength lower than that of the concave-convex sections are reinforced due to the reinforcement sections, so that the lifter installation sections are prevented from being extremely being deformed during the rolling process.