A top-loading washing machine comprising a pivoting lid
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Solution Overview
Problem
The assembly of top-loading washing machine lids is complex due to the need for exact outer dimensions of the counter-lid to match the inner dimensions of the stamped steel lid, and the production of the stamped steel lid with a predetermined shape is intricate.
Innovation Solution
A pivoting lid design featuring a plastics-made lid body with two lateral guides for inserting a cover sheet, which forms the substantial upper surface, allowing for easy assembly and production with a simple structure, and optionally using a metal sheet for stability and multiple design options, along with an elastic element and hinges for secure closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a stamped steel lid with a predetermined shape is used, then the lid provides structural strength and durability, but the production complexity and manufacturing cost increase significantly
Solution Approach 1:
The lid is divided into two separate components: a counter-lid made of plastics (polypropylene) and a stamped steel lid. The counter-lid serves as a mold or form, and the stamped steel lid is formed by stamping the counter-lid, allowing complex shapes to be produced more easily through the molding process rather than direct steel forming
Solution Approach 2:
The counter-lid made of plastics acts as an intermediary tool or mold that enables the formation of the stamped steel lid with the desired shape. This intermediary component simplifies the manufacturing process by allowing the complex shape to be defined by the easier-to-produce plastic mold rather than by complex steel forming operations
2Manufacturing precision
If the outer dimensions of the counter-lid are exactly adapted to the inner dimensions of the stamped steel lid, then the assembly fit is precise, but the assembly difficulty increases
Solution Approach 1:
The lid assembly is segmented into the counter-lid and the stamped steel lid as separate components that are assembled together. The counter-lid with its frame and fins serves as the base structure, and the stamped steel lid is attached to it, allowing for modular assembly that reduces overall complexity despite requiring dimensional coordination
Solution Approach 2:
The counter-lid is designed with a frame structure that includes fins inside the frame, which appear to serve as self-aligning or self-positioning features during assembly. The structure itself provides guidance and positioning, reducing the need for complex external assembly fixtures or procedures
Data Source
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AI summary
The present invention relates to a top-loading washing machine comprising a pivoting lid at a top side of said washing machine. The lid includes a lid body (10) and a cover sheet (12). The cover sheet (12) is inserted in or insertable into the lid body (10). The cover sheet (12) forms the substantial upper surface of the lid. The lid body (10) comprises two lateral guides (24) for inserting the cover sheet (12). The lid body (10) is made of plastics. The lid body (10) forms a single-piece part. Further, the present invention relates to a lid for a top-loading washing machine.