Integrated Front Body Joint for Stable Vehicle Crash Load Transfer

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Solution Overview

Problem

Conventional vehicles exhibit poor collision force transfer effect, stability, and occupant protection due to separate connection structures between the longitudinal beam, lateral beam, and A-pillar.

Innovation Solution

An integrated member connects the longitudinal beam, lateral beam, and A-pillar, dispersing collision forces through a highly integrated structure, enhancing stability and protection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If separate connection structures are used to connect the longitudinal beam, lateral beam, and A-pillar, then the device complexity is reduced and ease of manufacture is improved, but the collision force transfer stability and occupant protection performance deteriorate

Engineering Contradiction:
Improveease of manufactureVSAvoidcollision force transfer stability
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The patent combines multiple separate connection structures (first connection structure connecting longitudinal beam to inner/outer rear connecting plates, second connection structure connecting longitudinal beam to lateral beam, third connection structure connecting longitudinal beam to dust cover, and separate connection structure connecting longitudinal beam to dashboard) into a single integrated member. This integrated member simultaneously connects the longitudinal beam, lateral beam, and A-pillar, merging multiple connection functions into one structural component. This resolves the contradiction by improving collision force transfer stability through integration while maintaining manufacturing feasibility through modular design.

Inventive Principle:
Principle #5Merging (Combining)

2Adaptability or versatility

If multiple separate connection structures are used to connect the longitudinal beam to various components, then the adaptability and versatility are improved, but the device complexity increases

Engineering Contradiction:
ImproveadaptabilityVSAvoiddevice complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The integrated member is designed to perform multiple connection functions simultaneously. It connects the longitudinal beam to the lateral beam, to the A-pillar, and integrates the functions previously performed by separate connection structures. This multi-functional design reduces device complexity by eliminating redundant components while maintaining adaptability through the integrated member's ability to serve multiple structural purposes within the vehicle frame.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentEP4699910A1vehicle
Publication Date: 2026.02.25 BYD CO LTD
  • EP4699910A1 patent drawingFigure 1~2
  • EP4699910A1 patent drawingFigure 3~4
  • EP4699910A1 patent drawingFigure 5~6

AI summary

A vehicle is provided. The vehicle includes a longitudinal beam (141), an A-pillar (251), a lateral beam, and an integrated member (203), where the integrated member is installed on the longitudinal beam, and the integrated member is separately connected to the lateral beam and the A-pillar. When the longitudinal beam of the vehicle experiences a collision, a collision force can be dispersedly transferred to the lateral beam and the A-pillar through the integrated member that is highly integrated, so that a collision force transfer stability effect and protection performance for occupants are improved.