Die-Cast Vehicle Front Structure With Dual-Mounted Front Pillar
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle front structures with integrally formed front portions by die casting lack effective joint structures for efficiently transmitting collision loads to the front pillar during frontal collisions, and there is a need to improve load transmission while minimizing part count and weight.
Innovation Solution
A vehicle front structure with a front pillar mechanically fastened at two positions to a framework body, incorporating a pillar reinforcing portion that distributes collision loads between the pillar body and reinforcing portion, ensuring efficient load transmission without increasing the pillar's cross-sectional area, and utilizing a tubular shape with a flat fastened portion for enhanced contact area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the front pillar is made thicker to improve collision load transmission, then the collision load transmission capability is improved, but the occupant's view is obstructed
Solution Approach 1:
The front pillar is segmented into two functional parts: a pillar body portion that maintains a thin profile for visibility, and a pillar reinforcing portion that provides collision load transmission capability. This segmentation allows each part to fulfill its specific function without compromising the other.
Solution Approach 2:
The pillar reinforcing portion is disposed inside the pillar body portion, creating a nested structure where the inner reinforcing part is surrounded by the outer body portion. This nested configuration allows the reinforcing portion to be hidden within the pillar structure, maintaining a thin external profile while providing internal strength enhancement.
2Strength
If multiple fastening portions are used to improve collision load transmission, then the load transmission effectiveness is improved, but the device complexity increases
Solution Approach 1:
The fastening structure is segmented into two distinct fastening portions: a first fastening portion for the pillar body portion and a second fastening portion for the pillar reinforcing portion. This segmentation allows the complex fastening requirements to be distributed across separate locations, making the overall structure more manageable and systematic.
Solution Approach 2:
The two fastening portions are positioned at different locations along the pillar structure, utilizing the vertical dimension to distribute fastening points. This spatial distribution reduces the complexity at any single location while achieving comprehensive load transmission through multiple attachment points.
3Device complexity
If the framework body is made by die casting to reduce part count, then the number of parts is reduced, but the joint structure complexity for load transmission increases
Solution Approach 1:
The die-cast framework body is segmented to include distinct fastening portions at different locations, allowing the integrated framework to accommodate multiple attachment points for the front pillar. This segmentation within the integrated structure enables complex load transmission paths without requiring additional separate components.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A vehicle front structure is provided, the vehicle front structure including: a framework body (10) that is integrally formed by die casting and constitutes a framework of a vehicle front portion; and a front pillar (30) that extends in a vehicle-height direction and is mechanically fastened to the framework body (10) at least at a first fastening portion (48) and a second fastening portion (49) the first fastening portion (48) setting on an outer side of the framework body (10) in a vehicle-width direction, the second fastening portion (49) setting on an upper side of the framework body (10) in the vehicle-height direction. The front pillar (30) is configured to include a pillar body portion (32) constituting an outer face, and a pillar reinforcing portion (34) at least partially disposed inside the pillar body portion (32). The pillar body portion (32) and the first fastening portion (48) are mechanically fastened together. The pillar reinforcing portion (34) and the second fastening portion (49) are mechanically fastened together.