Vehicle Body Joint Structure for Detachable Rear Module Rigidity

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The existing joint structures of vehicle bodies in purpose-built vehicles (PBVs) are costly to modify for various customized services, and they lack sufficient rigidity and vibration insulation.

Innovation Solution

A joint structure comprising a fixed front body module and a detachable rear body module, connected via center floor member coupling modules and variable part coupling modules using electromagnetic forces, with magnetic members and a magnetic bush for enhanced rigidity and vibration absorption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the upper body structure is made detachable for various customized services, then adaptability is improved, but coupled rigidity deteriorates

Engineering Contradiction:

ImproveadaptabilityVSAvoidcoupled rigidity

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

The upper body is divided into detachable front and rear body modules that can be separated and reconfigured for different customized services. This segmentation enables adaptability while the magnetic coupling mechanism maintains rigidity when connected.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Traditional mechanical fastening systems are replaced with electromagnetic coupling using magnetic members. This substitution provides both detachability for adaptability and strong coupling force for rigidity, resolving the contradiction between ease of reconfiguration and structural strength.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If electromagnetic coupling is used for detachable connection, then ease of operation is improved, but reliability deteriorates

Engineering Contradiction:

Improveease of operationVSAvoidreliability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

Mechanical fastening operations are replaced with electromagnetic coupling through magnetic members. This enables easy attachment and detachment while the strong magnetic force ensures reliable connection during operation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The coupling system combines magnetic members with magnetic bushes, creating a composite coupling mechanism that provides both ease of operation through electromagnetic attraction and reliability through the combined structural integrity of the magnetic components.

Inventive Principle:

Principle #40Composite materials

3Manufacturing precision

If magnetic members are used for coupling, then manufacturing precision is improved, but object-generated harmful factors worsen

Engineering Contradiction:

Improvemanufacturing precisionVSAvoidelectromagnetic wave interference

Core Design Contradiction:

Manufacturing precisionVSObject-generated harmful factors

Solution Approach 1:

Magnetic bushes are introduced as intermediary components between the magnetic members and the external environment. These bushes shield the electromagnetic waves generated by the magnetic coupling while maintaining the precision of the magnetic connection.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The electromagnetic waves generated by the magnetic members are converted from harmful interference into beneficial vibration damping through the magnetic bushes, which absorb and dissipate the electromagnetic energy as mechanical vibration damping.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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

This solution reduces costs associated with changing the vehicle body structure, maintains coupled rigidity, and absorbs vibrations while shielding electromagnetic waves.

Implementation Method 1

a plurality of variable part coupling modules installed below the rear body module and coupled to the center floor member coupling modules by electromagnetic force

Methodology Applied

Scientific EffectElectromagnetic force: Electromagnet

Implementation Method 2

a magnetic bush inserted into an accommodation space... the magnetic bush may be made of a rubber material... by applying the magnetic bush, it is possible to absorb the vibration of the magnetic joint structure

Methodology Applied

Scientific EffectVibration absorption: Damping

Implementation Method 3

by applying the magnetic bush, it is possible to absorb the vibration of the magnetic joint structure and shield the electromagnetic waves

Methodology Applied

Scientific EffectElectromagnetic wave shielding: Faraday Cage

Data Source

PatentUS20250091648A1Joint structure of vehicle body

Publication Date: 2025.03.20 HYUNDAI MOTOR CO LTD

AI summary

An embodiment joint structure of a vehicle body includes a front body module fixed to a front portion of a center floor member of an underbody of the vehicle body, wherein the front body module is a fixed part, a rear body module detachably fixed to a rear portion of the center floor member and a rear portion of the front body module in a set shape, wherein the rear body module is a variable part, a plurality of center floor member coupling modules disposed on the center floor member at the rear portion of the front body module, and a plurality of variable part coupling modules disposed at a lower side of the rear body module and configured to be coupled to the center floor member coupling modules by electromagnetic force.