Dozer Blade Control via Segmented Hydraulic Cylinders
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Solution Overview
Problem
Existing dozer blades require multiple passes to correct grade errors due to interactions between pitch, tilt, and angle adjustments, leading to inefficiencies in surface control.
Innovation Solution
A work vehicle design featuring a boom assembly with tilt and angle cylinders, an attachment coupler, and an adjustable linkage system that allows for precise control of the dozer blade's position, reducing cross-functional interactions and improving grade control precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple passes are used to correct grade error, then grade control accuracy can be improved, but productivity decreases due to increased time consumption
Solution Approach 1:
The blade control system is segmented into three independent hydraulic cylinders: a tilt cylinder for pitch control, an angle cylinder for blade angle adjustment, and a side shift cylinder for lateral positioning. This segmentation allows each cylinder to control one degree of freedom independently, eliminating the interactive interference that previously required multiple passes for grade correction.
Solution Approach 2:
The blade assembly is designed with dynamic adjustability through three independent hydraulic cylinders that can simultaneously or sequentially adjust pitch, angle, and side shift positions. This dynamic control system enables the blade to adapt to varying ground conditions and achieve precise grade control in a single pass, improving both accuracy and productivity.
2Adaptability or versatility
If tilt and angle adjustments are made simultaneously, then operational flexibility is improved, but control precision decreases due to functional interactions
Solution Approach 1:
The control system separates pitch control (tilt cylinder), blade angle control (angle cylinder), and side shift control (side shift cylinder) into three independent functional segments. Each cylinder operates independently to control one degree of freedom, eliminating the functional interactions and cross-interference that previously degraded control precision while maintaining operational flexibility.
3Device complexity
If a traditional blade linkage system is used, then device complexity is reduced, but manufacturing precision of blade position deteriorates
Solution Approach 1:
The traditional mechanical linkage system is replaced with a hydraulic control system consisting of three independent hydraulic cylinders (tilt cylinder, angle cylinder, side shift cylinder) that directly actuate the blade assembly. This substitution eliminates the accumulation of manufacturing tolerances and mechanical play inherent in linkage systems, achieving superior blade position accuracy while maintaining reasonable system complexity.
Data Source
AI summary
A work vehicle comprising a frame supported by a ground engaging device. A boom assembly is coupled to the frame. A boom cylinder is coupled to the frame and the boom assembly. An attachment coupler is coupled to a distal portion of the boom assembly. At least one tilt cylinder is coupled to the boom assembly and the attachment coupler. An attachment is coupled to the attachment coupler. The attachment comprises an attachment frame coupled to the attachment coupler. The attachment frame has a lower portion and an upper portion. A joint is coupled to the lower portion of the attachment frame and a blade. The joint has an upper surface and a lower surface positioned a distance from the surface. An angle cylinder is coupled to the lower portion of the attachment frame and a dozer blade. A portion of the angle cylinder is positioned below the upper surface.