Rear Pillar Reinforcement Layout for Dual-Motion Door Hinge Loads

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Solution Overview

Problem

Existing vehicle rear structures lack sufficient stiffness and strength to stably support heavy components like dual-motion rear door hinges, leading to potential deformation or damage under impact loads or heavy component loads.

Innovation Solution

A vehicle rear structure design that includes a rear pillar with internal reinforcements and a component mounting bracket, where the reinforcements surround the mounting bracket to distribute and transfer loads in various directions, enhancing mounting stiffness and preventing sagging of the rear door.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a dual-motion rear door hinge is installed to allow independent door operation, then door functionality is improved, but the weight and complexity of the rear structure increase

Engineering Contradiction:

Improvedoor operation independenceVSAvoidrear structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The rear structure is segmented into multiple reinforcement members (first reinforcement member extending vertically, second reinforcement member extending horizontally, and third reinforcement member connecting them), each serving specific load-bearing functions. This segmentation allows the complex dual-motion hinge to be supported by a distributed reinforcement system rather than a monolithic structure, reducing overall complexity while maintaining functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The reinforcement members are arranged in three-dimensional space around the component mounting bracket, creating a spatial reinforcement framework. The first reinforcement member extends in the vertical direction, the second in the horizontal direction, and the third connects them diagonally, forming a three-dimensional load distribution network that enhances structural capacity without increasing planar footprint.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If a dual-motion rear door hinge is installed to allow independent door operation, then door functionality is improved, but the weight of the rear structure increases

Engineering Contradiction:

Improvedoor operation independenceVSAvoidrear structure weight

Core Design Contradiction:

Adaptability or versatilityVSWeight of stationary object

Solution Approach 1:

Reinforcement members are strategically positioned only where load paths are needed - specifically around the component mounting bracket and along the rear pillar inner - rather than uniformly throughout the entire rear structure. This localized reinforcement approach provides the necessary support for the heavy dual-motion hinge while minimizing unnecessary weight addition in areas that do not require additional strengthening.

Inventive Principle:

Principle #3Local quality

3Strength

If reinforcements are added to support heavy components, then mounting stiffness is improved, but device complexity increases

Engineering Contradiction:

Improvemounting stiffnessVSAvoidrear structure complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

Multiple reinforcement members (first vertical reinforcement, second horizontal reinforcement, and third connecting reinforcement) are merged into an integrated reinforcement system that collectively supports the component mounting bracket. Rather than adding separate, independent reinforcement elements, they are combined to form a unified load-bearing framework that enhances mounting stiffness while presenting a cohesive structural solution.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The rear structure employs a composite reinforcement system combining multiple reinforcement members made of high-strength materials, integrated with the rear pillar inner and component mounting bracket. This composite approach creates a unified structure with enhanced stiffness-to-weight ratio, achieving high mounting stiffness without proportionally increasing overall complexity.

Inventive Principle:

Principle #40Composite materials

4Shape

If the receiving portion is recessed into the component mounting bracket, then component protrusion is reduced, but manufacturing complexity increases

Engineering Contradiction:

Improvecomponent protrusionVSAvoidbracket manufacturing

Core Design Contradiction:

ShapeVSEase of manufacture

Solution Approach 1:

The receiving portion is recessed into the component mounting bracket, creating a nested configuration where the vehicle component is partially housed within the bracket structure. This nesting arrangement reduces the external protrusion of the component while maintaining secure mounting, and the recessed design allows for integrated manufacturing of the bracket as a single piece with the reinforcement members.

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentUS12202546B2Vehicle rear structure

Publication Date: 2025.01.21 HYUNDAI MOTOR CO LTD

AI summary

An embodiment vehicle rear structure includes a rear pillar, including a rear pillar inner and a plurality of reinforcements mounted on the rear pillar inner. A component mounting bracket is attached to the rear pillar and has a receiving portion in which a portion of a vehicle component is received. The reinforcements are disposed to surround the component mounting bracket.