Utility Vehicle Chassis Cabin Floor Reinforcement Design
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Solution Overview
Problem
Utility vehicle chassis designs face challenges in reinforcing the cabin floor to withstand torsional stresses and heavy loads without increasing vehicle weight, while also ensuring rapid and cost-effective assembly of the cell on the chassis without weakening the cabin floor.
Innovation Solution
The chassis incorporates vertically extending profile reinforcements welded to the cabin floor and beams, providing support against torsional forces and allowing for efficient cell mounting using gripping members, which are configured to support the cell in three directions without significantly increasing the vehicle's weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cab floor is reinforced to withstand torsional stresses and heavy loads, then the strength and stiffness of the cab floor is improved, but the vehicle weight increases
Solution Approach 1:
The reinforcement system is divided into discrete longitudinal reinforcements positioned at specific locations along the cab floor, rather than a continuous reinforcement structure. This segmentation allows strength to be provided only where needed while minimizing overall weight addition.
Solution Approach 2:
Reinforcements are positioned locally at the longitudinal edges of the cab floor where torsional stresses are highest, rather than uniformly across the entire floor. This localized reinforcement approach provides maximum strength where required while minimizing weight increase.
2Productivity
If the cell is mounted as quickly as possible to reduce assembly costs, then the productivity is improved, but the positioning precision and attachment quality may be compromised
Solution Approach 1:
The longitudinal reinforcements are pre-positioned and welded to the cab floor during chassis assembly, creating predetermined mounting locations for the cell. This preliminary action ensures that when the cell is installed, the fasteners will engage with pre-positioned structural elements, enabling both rapid assembly and precise positioning.
Solution Approach 2:
The longitudinal reinforcements act as intermediary elements between the cab floor and the cell mounting fasteners. These reinforcements provide dedicated engagement points that simplify the mounting process while ensuring accurate positioning, allowing workers to quickly attach the cell without compromising precision.
3Reliability
If fasteners are used to anchor the cell to the chassis, then the cell attachment is achieved, but the cab floor is weakened
Solution Approach 1:
The longitudinal reinforcements serve as intermediary structural elements that bear the mounting loads from fasteners, rather than allowing fasteners to directly engage the cab floor. This mediation protects the cab floor from weakening while ensuring reliable cell attachment through the reinforcement structures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively stiffens the cabin floor against torsional forces, supports the weight of the load, and facilitates quick and robust cell assembly, reducing costs and maintaining the structural integrity of the cabin floor.
Implementation Method 1
vertically extending profile reinforcements welded to the cabin floor and beams
Data Source
Figure 1~2
AI summary
The invention relates to a chassis (2) for a utility motor vehicle (1), configured to receive a rigid cell (4). The chassis (2) comprises a cabin floor (7) attached at least to one understructure of the chassis (2) that comprises at least longitudinal beams (5) extending respectively along the lateral edges of the chassis (2). The understructure comprises reinforcements (8) for holding the cabin floor (7) at its lower face (11). The reinforcements (8) are in each case encased laterally between a beam (5) of the understructure and a flange (12) of the cabin floor (7) assigned thereto.