Curved Blade Device Reducing Excavation Resistance and Soil Drop
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Solution Overview
Problem
Conventional blade devices for working machines, such as bulldozers, face challenges in reducing resistance forces during excavation and soil transportation, leading to increased horsepower consumption and reduced fuel efficiency, while also being prone to soil drop during turning and rotation, and requiring complex welding processes for assembly.
Innovation Solution
A blade device with a central front face and end front faces connected by coupling front faces, where the coupling front faces are bent backward and the end front faces are bent forward, with specific geometric parameters such as backward-bending angles and cutter positions to optimize excavation efficiency and reduce soil drop, and featuring a combination of sheet metal and molded body construction for lightweight and rigid structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional blade devices are used for excavation and soil transportation, then the working machine can perform basic earthmoving operations, but the resistance forces increase leading to higher horsepower consumption and reduced fuel efficiency
Solution Approach 1:
The blade employs curved front faces with specific radii of curvature (R1, R2, R3) instead of flat surfaces. The coupling front faces have a radius R1, end front faces have radius R2, and the central front face has radius R3. These curved surfaces reduce soil adhesion and resistance forces during excavation and transportation, thereby lowering horsepower consumption and improving fuel efficiency.
Solution Approach 2:
The invention optimizes specific geometric parameters including the backward-bending angle δ (14°-30°), crossing angle θ (0°-30°), and retraction amount Wt to reduce resistance forces. By carefully controlling these parameters, the blade achieves minimal energy consumption while maintaining effective soil transportation capability.
2Ease of manufacture
If the blade structure is simplified for easier manufacture, then manufacturing complexity decreases, but the blade may lose structural strength and rigidity required for heavy-duty earthmoving operations
Solution Approach 1:
The blade is divided into multiple segments including central front face, coupling front faces, and end front faces that can be manufactured separately and then assembled. This segmentation allows each component to be optimized independently for strength while simplifying the overall manufacturing process and enabling modular assembly.
Solution Approach 2:
The blade utilizes composite construction combining sheet metal components with molded body parts. This composite approach allows different regions of the blade to use materials and manufacturing processes best suited for their specific functional requirements, achieving both strength and ease of manufacture.
Data Source
AI summary
Concave front face surfaces of a blade device having ratios and configurations continuing from an upper end to a lower end of the blade device, and having a central face coupling front faces and end front faces on the right and left thereof.