Four-Upright Cab Frame Asymmetry for Visibility
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Solution Overview
Problem
Existing cab frames in engineering vehicles, such as graders, suffer from visual field obstruction and insufficient operator head movement space due to their six-upright structure with consistent upper and lower dimensions, leading to low operating efficiency and safety.
Innovation Solution
A cab frame with a four-upright-column structure, where the upper portion is larger than the lower, and the top skin portion is wider than the bottom frame, with a rear skin portion that inclines backward, and floor-to-ceiling front glass installation to reduce obstructions and enhance visibility and head movement space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a six-upright structure with consistent upper and lower dimensions is used, then structural stability is improved, but visual field obstruction increases and head movement space decreases
Solution Approach 1:
The patent applies asymmetry by transitioning from a traditional six-upright structure with consistent dimensions to a four-upright structure where the upper portion is larger than the lower portion. This asymmetric design reduces visual field obstruction and increases head movement space while maintaining structural stability through strategic upright placement and optimized dimension distribution.
Solution Approach 2:
The patent extracts two upright columns from the traditional six-upright structure, reducing the total number to four. This extraction eliminates unnecessary structural elements that cause visual obstruction while preserving the essential support function through the optimized four-upright configuration with enlarged upper portion.
2Strength
If a six-upright structure with consistent upper and lower dimensions is used, then structural support is improved, but inner movement space for operator head decreases
Solution Approach 1:
The patent employs asymmetry by designing the cab frame with an upper portion that is larger than the lower portion. This asymmetric configuration creates additional vertical space in the upper region, providing sufficient head movement space for the operator while maintaining structural support through the four-upright column structure strategically positioned between the bottom and top frames.
3Object-affected harmful factors
If the top skin portion is wider than the bottom frame, then visual field is broadened, but structural complexity increases
Solution Approach 1:
The patent applies asymmetry by configuring the top skin portion to be wider than the bottom frame, creating a tapered profile that broadens the visual field. This asymmetric design is simplified by using only four upright columns instead of six, reducing structural complexity while achieving the desired visual field expansion through the optimized frame geometry.
Data Source
AI summary
A cab frame includes a support framework, where the support framework includes a bottom frame, a top frame, and a four-upright-column structure supported between the bottom frame and the top frame; the four-upright-column structure includes two front upright columns and two rear upright columns, and an inner dimension of the cab frame increases along the bottom-to-top direction.