Rear Longitudinal Beam Structure for Sports Car Rear Crash Loads
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Solution Overview
Problem
Conventional sports car body structures made of metal materials face reduced crashworthiness due to reduced structural size, compromising driving safety.
Innovation Solution
A vehicle design incorporating a rear longitudinal beam assembly, rear subframe, and strut assembly that disperses impact forces through multiple transmission paths, enhancing crashworthiness by integrating the rear subframe with the rear longitudinal beam assembly and strut assembly to absorb and distribute impact energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the body structure size is significantly reduced, then the structural size of the tail of the vehicle body is reduced, but the crashworthiness of the body structure deteriorates
Solution Approach 1:
The body structure is divided into multiple load-bearing components including the rear longitudinal beam assembly, rear subframe, and strut assembly. Each component is independently optimized and connected through mounting structures to form a segmented load distribution system that maintains crashworthiness while allowing overall size reduction.
Solution Approach 2:
The patent employs composite material construction in the load-bearing components, combining materials with different mechanical properties to achieve high strength-to-weight ratios. This allows the components to maintain structural integrity and crashworthiness while reducing overall volume and mass of the body structure.
2Strength
If multiple load-bearing components are integrated, then the crashworthiness is improved, but the device complexity increases
Solution Approach 1:
The rear longitudinal beam assembly, rear subframe, and strut assembly are designed as multi-functional components that simultaneously serve structural support, load bearing, and crash energy management functions. This reduces the need for separate dedicated components, thereby improving crashworthiness without proportionally increasing overall structural complexity.
Solution Approach 2:
Multiple load-bearing functions are merged into integrated assemblies. The rear longitudinal beam assembly connects to both the rear subframe and strut assembly through mounting structures, creating a unified load path system that distributes crash forces efficiently across multiple components while maintaining a cohesive structural architecture.
Data Source
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AI summary
A vehicle, comprising: a rear longitudinal beam assembly (410) and a strut assembly, wherein a mounting structure is provided on the rear longitudinal beam assembly (410); and a rear subframe (80), which is connected to the bottom of the rear longitudinal beam assembly (410) by means of the mounting structure, wherein one end of the strut assembly is connected to the rear longitudinal beam assembly (410), and the other end of the strut assembly is connected to an occupant compartment (20); and an end of the rear longitudinal beam assembly (410) is connected to the occupant compartment (20), such that a rearward collision force received by the vehicle can be dispersed, thereby improving the overall collision strength of the vehicle.