Interleaved Grille Cover for Pedestrian Warning Sounders
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Solution Overview
Problem
New energy vehicles, such as electric vehicles, are quiet at low speeds, increasing the risk of accidents due to pedestrians not noticing their presence, and existing exterior pedestrian warning devices are vulnerable to environmental disturbances.
Innovation Solution
A pedestrian warning device with a grille cover featuring interleaving crossbeams that form gaps for air flow, protecting internal components while maintaining sound diffusion and air permeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a grille cover is added to protect internal components, then protection against external factors is improved, but device complexity increases
Solution Approach 1:
The grille cover is divided into multiple grille layers (at least two layers) with crossbeams arranged in segments. Each layer provides partial protection, and the segmented structure allows air to pass through while offering robust protection against external factors like dust and debris.
Solution Approach 2:
Multiple grille layers are nested within each other, with crossbeams of different layers interlaced. The first grille layer contains crossbeams that extend along a first direction, while the second grille layer contains crossbeams extending along a second direction, creating a nested protective structure that maximizes protection while maintaining air permeability.
2Quantity of substance
If crossbeams are arranged to form gaps for air flow, then air permeability is improved, but structural strength deteriorates
Solution Approach 1:
The grille cover employs local quality by varying the arrangement and orientation of crossbeams in different areas. The first grille layer has crossbeams extending along a first direction with gaps for air flow, while the second grille layer has crossbeams extending along a second direction, creating localized variations in strength and permeability to optimize both air flow and structural strength.
Solution Approach 2:
The grille cover uses a composite structure combining multiple grille layers with different crossbeam orientations. This composite arrangement creates a more robust structure compared to a single layer, as the interlaced crossbeams provide mutual support, enhancing overall strength while maintaining air permeability through the gaps.
3Reliability
If multiple grille layers are used for protection, then protection effectiveness is improved, but manufacturing complexity increases
Solution Approach 1:
The protective grille cover is segmented into multiple independent layers, each with its own crossbeam structure. This segmentation allows each layer to be manufactured separately using standardized processes, and then assembled together, reducing overall manufacturing complexity despite the multi-layer design.
Solution Approach 2:
The grille cover design achieves multi-functionality by combining protection and air flow functions in a single integrated structure. The crossbeams of the first and second grille layers serve dual purposes: providing structural strength and creating gaps for air flow, eliminating the need for separate protective and ventilative components.
Data Source
Figure 1
Figure 2~3
AI summary
Provided is a pedestrian warning device having a grille cover, comprising having a cavity (10), an open warning device body (1), and a sound-emitting apparatus mounted inside said cavity (10); the pedestrian warning device further comprises a grille cover (3) coveringly arranged on one end part of the warning device body; the grille cover (3) comprises at least two grille layers spaced at intervals from the inside to the outside, each of said grille layers comprising a plurality of crossbeams (31a, 31b); the crossbeams (31a, 32a) are arranged at intervals so as to form gaps (31b, 32b) to enable gas to flow between adjacent crossbeams (31a, 32a), and the width of the gaps (31b, 32b) is not greater than the width of the crossbeams (31a, 32a); the crossbeams (31a, 32a) of adjacent grille layers are in an interleaving arrangement. The warning device can protect internal component parts, and the performance of the pedestrian warning device is not affected.