Elevator Floor With Local Honeycomb Reinforcement
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Solution Overview
Problem
Existing elevator floor designs, even with composite or sandwich constructions, fail to meet high demands for rigidity and resilience, especially under high mechanical loads, and are challenging to produce efficiently and inexpensively.
Innovation Solution
A floor design featuring a metallic base and cover plate with a support structure having a first packing density, locally reinforced by a second arrangement with a higher packing density, typically a honeycomb structure with smaller cells, which is strategically positioned to enhance mechanical strength and absorb impact energies effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a uniform honeycomb structure is used throughout the floor, then the floor achieves good mechanical strength, but the weight increases and manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by varying the honeycomb structure density across different floor regions. High-density honeycomb cells are placed in areas requiring greater strength (e.g., near doors, corners), while low-density cells are used in less critical areas. This selective distribution optimizes mechanical strength where needed while minimizing overall weight and material usage.
Solution Approach 2:
The floor is segmented into multiple zones with different honeycomb densities. The support structure is divided into first and second arrangements with different packing densities, allowing each segment to be optimized for its specific functional requirements rather than using a uniform structure throughout the entire floor.
2Stability of the object's composition
If the support structure is reinforced throughout the entire floor area, then rigidity and impact absorption improve, but manufacturing complexity and cost increase
Solution Approach 1:
The support structure implements local quality by providing different packing densities in different regions. The first arrangement has a lower packing density for general areas, while the second arrangement has a higher packing density specifically in regions requiring enhanced rigidity and impact absorption, such as areas above the buffer element or near high-traffic zones.
Solution Approach 2:
Instead of uniformly reinforcing the entire floor, the patent applies partial reinforcement only where structurally necessary. The second arrangement with higher packing density is strategically positioned to provide excessive reinforcement only in critical areas, rather than applying uniform reinforcement across the whole floor surface.
3Strength
If a composite sandwich construction is used, then load-bearing capacity increases, but manufacturing difficulty and cost increase
Solution Approach 1:
The patent employs composite materials by combining metallic plates (base plate and cover plate) with a honeycomb support structure made of potentially different materials. This composite construction achieves high load-bearing capacity by leveraging the strengths of each material: the metallic plates provide surface integrity and attachment points, while the honeycomb structure provides core strength and impact absorption.
Solution Approach 2:
The floor is segmented into distinct components (base plate, cover plate, and support structure) that can be manufactured separately and then assembled. This segmentation allows each component to be optimized and manufactured using the most appropriate processes, reducing overall manufacturing complexity compared to creating a monolithic composite structure.
Data Source
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AI summary
The invention relates to a floor for an elevator car, comprising a base plate (7), a cover plate (8), and a support structure (6) arranged therebetween. The support structure (6) comprises a first grating arrangement (10) made of a plurality of upright intersecting profiled sections (12, 13). For local reinforcement, the support structure (6) additionally comprises a centrally arranged second grating arrangement (11) that is superimposed on the first arrangement.