Swing-Open Front Guard Layout for Engine Bonnet Branch Protection
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Solution Overview
Problem
Existing work vehicles face damage to the engine bonnet from branches and maintenance is hindered due to the design of the front guard, which does not effectively prevent branches from entering the gap between the guard and the engine bonnet, and complicates access for maintenance.
Innovation Solution
A work vehicle design featuring a swingable engine bonnet with a front guard comprising a lower and upper section, where the upper guard section is coupled via a coupling axis that allows it to change between closed and open postures, with longitudinally-oriented sections to block branches and a raised coupling axis for easier maintenance access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the front guard has a simple structure without longitudinally-oriented sections, then the device complexity is reduced, but branches can enter the gap between the guard and engine bonnet causing damage
Solution Approach 1:
The upper guard section is divided into multiple functional parts: a laterally-oriented section and longitudinally-oriented sections. This segmentation allows the guard to block branches effectively while maintaining a manageable structural complexity. The longitudinally-oriented sections specifically address the gap problem between the guard and engine bonnet.
Solution Approach 2:
The upper guard section is designed to extend in multiple directions (laterally and longitudinally) rather than simply vertically. This multi-dimensional configuration creates a more comprehensive barrier against branches entering the gap between the front guard and engine bonnet, preventing damage from multiple angles.
2Ease of operation
If the coupling axis is positioned low, then the structure is simpler, but the open upper guard section blocks access to the engine compartment for maintenance
Solution Approach 1:
The coupling axis is pre-positioned at an elevated location forward of the engine bonnet, anticipating the need for maintenance access. This preliminary design decision ensures that when the upper guard section is opened, it swings forward and upward, automatically clearing the engine compartment area without requiring additional adjustment mechanisms.
Solution Approach 2:
The upper guard section is designed to dynamically swing on the coupling axis between closed and open postures. When opened, the elevated coupling axis position causes the guard to swing forward and upward, creating sufficient clearance for maintenance access. This dynamic movement resolves the conflict between structural simplicity and maintenance accessibility.
3Ease of operation
If the engine bonnet is fixed, then the structure is simpler, but maintenance access to the engine compartment is limited
Solution Approach 1:
The engine bonnet is designed to swing open upward relative to the front guard, transforming from a fixed structure to a dynamic one. This swinging motion, enabled by the coupling axis mechanism, provides wide access to the engine compartment while maintaining structural simplicity through the use of existing guard components as pivot points.
Data Source
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AI summary
A work vehicle comprising: an engine bonnet in a front section of a body of the work vehicle and forming an engine compartment, the engine bonnet being swingably openable and closable in an up-down direction of the body with an opening and closing axis extending in a width direction of the body in a rear section of the engine bonnet as a swing fulcrum; and a front guard covering a front portion of the engine bonnet and including a lower guard section fixedly supported by a body frame and an upper guard section supported by the lower guard section.