Loop-Shaped Cabin Frame for Work Vehicle Stress Distribution
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Solution Overview
Problem
The existing frame structures for work vehicles face challenges in providing sufficient strength to protect passengers while minimizing the complexity and weight of the vehicle, leading to increased manufacturing costs and potential deformation due to stress concentration at sharp angles.
Innovation Solution
A vehicle frame structure featuring a cabin frame assembled into a box form with a base frame welded to it, using pipe material formed into a loop to distribute stress and reduce complexity, with side frames formed from irregularly shaped pipes to absorb external forces and prevent deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cabin frame is equipped with structurally strong members and reinforcing members to provide sufficient strength, then the strength and protection capability are improved, but the component parts increase in number and the frame structure becomes more complicated, resulting in increased overall weight and higher manufacturing cost
Solution Approach 1:
The patent applies curvature by forming the side frames into loop shapes rather than straight angular members. This curved loop structure provides superior strength and stress distribution while reducing the number of separate reinforcing members needed, thereby simplifying the overall frame structure and reducing weight.
Solution Approach 2:
The patent merges the functions of multiple separate members into integrated loop-shaped side frames that simultaneously provide structural strength, stress distribution, and positioning functions. The base frame and cabin frame are also integrated through welding, reducing the need for additional complex connection mechanisms.
2Device complexity
If the cabin frame is formed so that each corner forms a sharp angle, then the structural configuration is simplified, but stress tends to be concentrated on each corner when an outside force is applied, which increases the possibility of deforming the cabin frame
Solution Approach 1:
The patent replaces sharp angular corners with curved loop-shaped side frames. This curvature eliminates stress concentration points that would occur at sharp angles while maintaining structural simplicity. The smooth curved transitions in the loop shape naturally distribute applied forces along the entire frame structure rather than concentrating them at specific corner points.
3Strength
If the frame structure uses more component parts and reinforcing members to achieve sufficient strength, then the protection capability is improved, but the overall weight of the vehicle increases leading to less efficient fuel consumption
Solution Approach 1:
The loop-shaped curved side frames provide higher strength-to-weight ratio compared to traditional straight angular members with multiple reinforcements. The curved geometry inherently distributes stresses more efficiently, allowing the use of lighter gauge materials while maintaining or improving overall frame strength, thereby reducing vehicle weight and improving fuel efficiency.
Solution Approach 2:
The patent employs welded construction integrating the base frame and cabin frame into a unified structure, potentially using different material gauges or compositions optimized for specific structural requirements rather than uniformly heavy materials throughout, achieving weight optimization while maintaining necessary strength levels.
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 design enhances the structural strength and visibility of the vehicle frame, reduces weight and manufacturing costs, and minimizes the risk of deformation by distributing stress evenly, improving both the functionality and efficiency of the vehicle frame.
Implementation Method 1
a base frame welded to the cabin frame
Data Source
AI summary
The vehicle frame for a work vehicle includes a cabin frame that is assembled into a substantially box form. A base frame is welded to the cabin frame. The cabin frame includes left and right side frames, each of which is formed into a loop. The cabin member includes a plurality of cross members for connecting the left and right side frames. Each of the side frames is formed with a single one-piece pipe material having a first end and a second end with the first end connected to the second end such that a tangential direction extending along a region of the first end coincides with a tangential direction extending along a region of the second end. The pipe material has an irregular shape having a recess formed along the entire length between the first end and the second end of the pipe material.