Vehicle Body Rear Stiffener Integration for Twist Rigidity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle body rear part structures struggle to adequately support tensile loads during vehicle twisting, particularly due to insufficient reinforcement of joints between reinforcement members and the rear door opening, and the use of aluminum alloy panels reduces body rigidity.
Innovation Solution
A vehicle body rear part structure incorporating a load support part formed by joining side sill, quarter pillar, and damper stiffeners, which includes a door opening flange to enhance rigidity and distribute tensile loads to the roof side rail, thereby increasing the overall rigidity of the vehicle body against twisting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a quarter pillar reinforcement is provided to increase the rigidity of the quarter pillar, then the deformation of the joint is suppressed, but the joints between the reinforcement members and the rear door opening cannot be sufficiently reinforced to support tensile loads
Solution Approach 1:
The patent combines multiple reinforcement members (side sill reinforcing member, quarter pillar reinforcing member, and rear wheel house reinforcing member) into an integrated load transmission system. These members are continuously joined to form a unified structure that effectively transmits tensile loads from the quarter pillar to the side sill and rear wheel house, resolving the issue of insufficient joint reinforcement while maintaining quarter pillar rigidity.
Solution Approach 2:
The patent pre-establishes continuous load transmission paths through the reinforcing members before tensile loads are applied to the quarter pillar. By continuously joining the side sill reinforcing member, quarter pillar reinforcing member, and rear wheel house reinforcing member, the structure is prepared in advance to effectively distribute and support tensile loads when they occur during vehicle body twisting.
2Weight of moving object
If aluminum alloy panels are applied to the outer plate to reduce weight, then the body rigidity is reduced due to reduction in surface rigidity, but weight reduction is achieved
Solution Approach 1:
The patent applies local quality enhancement by providing reinforcing members at specific critical locations (side sill, quarter pillar, and rear wheel house areas) rather than uniformly reinforcing the entire body. This allows the use of lighter aluminum alloy panels in non-critical areas while maintaining overall body rigidity through localized reinforcement where tensile loads are most significant.
Solution Approach 2:
The patent creates a composite structure by combining aluminum alloy outer panels with steel or higher-strength reinforcement members. The aluminum alloy provides weight reduction and corrosion resistance, while the reinforcing members provide the necessary strength and rigidity to compensate for the lower surface rigidity of aluminum alloy panels, achieving both weight reduction and maintained body rigidity.
3Device complexity
If only a load transmission path in the door opening between the side sill and the quarter pillar is provided, then the structure is simple, but it is difficult to sufficiently support the tensile load generated due to twisting of the vehicle body
Solution Approach 1:
The patent segments the load transmission function into three distinct but continuously joined reinforcing members: side sill reinforcing member, quarter pillar reinforcing member, and rear wheel house reinforcing member. Each member is positioned at a specific location to handle particular aspects of the tensile load, and their continuous joining creates a comprehensive load transmission network that effectively supports vehicle body twisting while maintaining structural clarity and manufacturability.
Data Source
AI summary
The disclosure provides a vehicle body rear part structure. The vehicle body rear part structure includes a load support part on a quarter pillar. The load support part includes a side sill stiffener, a quarter pillar stiffener and a damper stiffener. The side sill stiffener reinforces a side sill and forms a part of the quarter pillar. The quarter pillar stiffener is provided continuously with the side sill stiffener and reinforces the quarter pillar. The damper stiffener is provided above a rear wheel house and joined to the quarter pillar stiffener and a roof side rail.