Underrun Protection Structure With Segmented Lightening Holes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing underrun protection systems, whether made of steel or aluminum, face challenges in reducing weight while maintaining sufficient strength and stiffness, as the placement of lightening holes can compromise the structural integrity.
Innovation Solution
A structure for underrun protection featuring a hollow section with lightening holes on the upper and lower faces, binder parts, and a modular design with distal and proximal panels, where the lightening holes are strategically positioned to maintain stiffness and reduce weight by distributing loads effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If lightening holes are formed on the underrun protection, then weight is reduced, but strength and stiffness may largely lower
Solution Approach 1:
The patent applies local quality by differentiating between edge lightening holes in the edge part and middle lightening holes in the middle part. The edge lightening holes have smaller diameters than the middle lightening holes, creating non-uniform hole distribution that preserves structural integrity at critical edge regions while maximizing weight reduction in the middle section.
Solution Approach 2:
The underrun protection is segmented into three distinct parts: edge parts outside the binder parts, binder parts between the middle part and each edge, and a middle part between the binder parts. This segmentation allows for differentiated lightening hole placement strategies in each zone, optimizing both weight reduction and structural performance.
2Strength
If steel is used for underrun protection, then strength and stiffness are ensured, but weight increases
Solution Approach 1:
The patent changes the physical parameters of the underrun protection by forming lightening holes with specific diameter variations in different regions. This parameter modification reduces the material quantity and weight while carefully controlling the impact on structural strength and stiffness through strategic hole placement and size differentiation.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
[Object] To provide a structure of an underrun protection that efficiently achieves weight reduction. [Arrangement for Attaining the Object] A structure of an underrun protection 10 bound to a plurality of brackets disposed at the front or rear portion of a frame of a vehicle characterized in that: a hollow having a closed section is defined by a distal face of a longitudinal direction of the vehicle, a proximal face of the longitudinal direction, an upper face, and a lower face; and lightening holes 51, 52 and 53 are formed on at least one of the upper face and the lower face of the underrun protection 10.