Onboard Apparatus Fastening Bracket with Fragile Section

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Solution Overview

Problem

Existing fastening structures for onboard apparatuses in vehicles face challenges in preventing collision damage while minimizing weight and cost, particularly in electric vehicles where high-voltage components pose risks of secondary damage during collisions.

Innovation Solution

A fastening structure featuring a support member with a protruding section and a bracket with a fragile section between fastening points, designed to deform and move the onboard apparatus upward using external forces as a fulcrum, thereby reducing the risk of collision with other components while maintaining structural integrity and minimizing weight and cost.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a guide member is provided to guide the detached onboard apparatus in a predetermined direction, then the onboard apparatus can be prevented from making contact with apparatuses disposed behind it, but the weight and cost of the guide member increase

Engineering Contradiction:

Improvecollision damageVSAvoidweight

Core Design Contradiction:

Object-affected harmful factorsVSWeight of moving object

Solution Approach 1:

The bracket is divided into three functional sections: a front fastening section, a rear fastening section, and a fragile section. This segmentation allows the bracket to provide guidance functionality through its structural design rather than requiring a separate guide member, thereby reducing weight while maintaining collision protection.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The bracket serves multiple functions: it fastens the onboard apparatus to the vehicle body, provides a fulcrum for upward movement during collision, and guides the detached apparatus in a predetermined direction. By integrating these functions into a single component, the need for additional guide members is eliminated, reducing overall weight.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Object-affected harmful factors

Engineering Contradiction:

Improvecollision damageVSAvoidcost

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The guidance function is merged with the fastening bracket by designing the fragile section with specific geometric features (protrusions or beads) that provide directional guidance during detachment. This consolidation eliminates the need for a separate guide member, reducing part count and manufacturing cost.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The bracket is designed to perform multiple functions including fastening, fulcrum provision, and directional guidance. This multi-functionality reduces the total number of components required, simplifying manufacturing and reducing cost.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Object-affected harmful factors

If the onboard apparatus is detached from the vehicle body to prevent contact with apparatuses disposed behind it, then collision protection is improved, but the apparatus may move in an unexpected direction

Engineering Contradiction:

Improvecollision damageVSAvoidmovement control

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The fragile section of the bracket is designed with specific local geometric features (protrusions or beads) that create asymmetric contact surfaces. These local structural characteristics guide the detached onboard apparatus in a predetermined upward direction, preventing unexpected movement while maintaining collision protection.

Inventive Principle:

Principle #3Local quality

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 proposed fastening structure effectively moves the rear section of the onboard apparatus upward during a collision, preventing contact with other components and enhancing protection while suppressing weight and cost increases, thus ensuring enhanced safety and operational efficiency.

Implementation Method 1

the rear section of the onboard apparatus is moved upward using the rear fastening section as a fulcrum

Methodology Applied

Scientific EffectLever: Lever

Implementation Method 2

the fragile section is deformed and the rear section of the onboard apparatus is moved upward

Methodology Applied

Scientific EffectDeformation: Deformation

Data Source

PatentUS9902334B2Fastening structure of onboard apparatus

Publication Date: 2018.02.27 MITSUBISHI MOTORS CORP

AI summary

A fastening structure of an onboard apparatus to be fastened to a vehicle body includes a support member that is fastened to the vehicle body to support the onboard apparatus and has a protruding section protruding rearward beyond a rear face of the onboard apparatus, and a bracket having a front fastening section to be fastened to a lower face of a rear section of the onboard apparatus, a rear fastening section to be fastened to the protruding section of the support member, and a fragile section provided between the front fastening section and the rear fastening section. By an external force from a front side of the onboard apparatus, the fragile section is deformed and the rear section of the onboard apparatus is moved upward using the rear fastening section as a fulcrum.