Flexible Rib Electrical Connection Box Vibration Backlash
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Solution Overview
Problem
Conventional electrical connection boxes in vehicles fail to properly secure internal components and wire harnesses, leading to potential displacement and stress due to vibrations, which can result in backlash and assembly challenges.
Innovation Solution
An electrical connection box design featuring a substrate assembly with conductive members, flexible ribs, and boss portions that elastically support and position the substrate within the housing, ensuring secure alignment and absorption of assembly and dimensional tolerances, thereby preventing relative movement and backlash.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional rigid support structures are used to hold the substrate assembly, then structural strength is improved, but displacement restriction becomes insufficient due to vibration-induced backlash
Solution Approach 1:
The support structure changes from rigid to flexible by modifying the physical state of the rib material. The flexible rib maintains structural strength while gaining elastic deformation capability to restrict displacement under vibration, resolving the contradiction between strength and displacement restriction.
Solution Approach 2:
The support structure transitions from a static rigid connection to a dynamic flexible connection that can adapt to vibrational forces. The flexible rib absorbs vibrations through elastic deformation, preventing backlash while maintaining structural integrity.
2Stability of the object's composition
If multiple support points are added to prevent displacement, then displacement restriction is improved, but device complexity increases
Solution Approach 1:
The support function is segmented into multiple flexible ribs distributed at different positions. Each rib independently provides displacement restriction, achieving stable support without requiring a complex integrated structure. The segmentation allows simple replication of identical flexible rib components.
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 design effectively restricts displacement and supports the substrate assembly, enhancing the securement of internal components, improving assembly workability, and reducing manufacturing costs by distributing forces and tolerances across the flexible ribs and boss portions.
Implementation Method 1
a first flexible rib that is extended along an extending direction, elastically deformable along a first support direction crossing the extending direction and the insertion direction, and supports the substrate assembly with respect to one side in the first support direction
Data Source
AI summary
An electrical connection box applied to a wire harness includes a substrate assembly and a housing the substrate assembly. The housing includes a first flexible rib that is extended along an extending direction Z, elastically deformable along a first support direction X, and supports the substrate assembly with respect to one side in the first support direction X, second flexible ribs that are extended along the extending direction Z, elastically deformable along the first support direction X, and supports the substrate assembly with respect to the other side in the first support direction X, and boss portions that are extended along the extending direction Z and position the substrate assembly with respect to the both sides in the first support direction X.