Rear Vehicle Body Reinforcing Structure for Hatchback Tail Gate Stability

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Solution Overview

Problem

The existing rear vehicle body structures in hatchback type space frame vehicles face challenges in maintaining a smooth opening/closing operation and stable closing posture of the tail gate due to insufficient reinforcement of the vehicle body rear door opening.

Innovation Solution

A rear vehicle body reinforcing structure featuring a rear reinforcing member with a 'U' shape, deployed around the vehicle body rear door opening, which includes extension members connected to shock absorber mounting reinforcing members, cross reinforcing members, and pillar members forming an annular structure to enhance structural strength and peripheral reinforcement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a rear reinforcing member with annular structure is added around the vehicle body rear door opening, then the structural strength and stability of the rear vehicle body is improved, but the device complexity and manufacturing cost increase

Engineering Contradiction:

Improvestructural strength of rear vehicle bodyVSAvoidcomplexity of rear vehicle body structure

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The patent combines multiple reinforcing functions into a single integrated annular rear reinforcing member that simultaneously connects to rear side members, quarter center reinforcing members, and quarter upper pillar members. This merging approach provides comprehensive reinforcement of the rear vehicle body structure without requiring multiple separate reinforcing components, thus improving structural strength while controlling device complexity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The rear reinforcing member is pre-configured with connection points and structures that enable straightforward assembly with existing vehicle body components. The annular structure is designed in advance with predetermined connection interfaces, allowing for efficient installation that minimizes additional manufacturing and assembly complexity

Inventive Principle:

Principle #10Preliminary action

2Strength

If extension members are added to connect the rear reinforcing member to shock absorber mounting reinforcing members, then the peripheral strength of the vehicle body rear door opening is improved, but the device complexity increases

Engineering Contradiction:

Improveperipheral strength of vehicle body rear door openingVSAvoidcomplexity of reinforcing member connections

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The rear reinforcing member is divided into functional segments including the main annular structure and separate extension members that protrude from specific locations. This segmentation allows each component to perform its specific reinforcement function independently while maintaining overall structural integrity, making the connection to shock absorber mounting reinforcing members more manageable and less complex

Inventive Principle:

Principle #1Segmentation

3Stability of the object's composition

If multiple reinforcing members and extension members are integrated into an annular structure, then the stability of tail gate closing posture is improved, but the manufacturing complexity increases

Engineering Contradiction:

Improvestability of tail gate closing postureVSAvoidease of manufacturing reinforcing structure

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The patent merges multiple reinforcing members into a single integrated annular structure that provides comprehensive support for the tail gate opening. This unified structure ensures stable closing posture by distributing forces evenly around the opening perimeter, while also simplifying manufacturing compared to assembling multiple separate components

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The annular (curved) configuration of the rear reinforcing member provides superior structural stability compared to straight-line arrangements. The curved geometry naturally distributes mechanical loads more effectively around the vehicle body rear door opening, enhancing tail gate closing stability while maintaining manufacturing feasibility through standard curved profile fabrication

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS9604673B2Rear vehicle body reinforcing structure

Publication Date: 2017.03.28 HYUNDAI MOTOR CO LTD

AI summary

A rear vehicle body reinforcing structure may include a rear reinforcing member deployed on a periphery of a vehicle body rear door opening and configured to be coupled to a rear vehicle body, in which the rear reinforcing member is opened upward in a height direction of a vehicle.