Dozer Blade Shoe Control System for Rearward Indentation Prevention
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Solution Overview
Problem
Dozer blade assemblies face challenges in preventing shoes from forming indentations in the ground surface during rearward movement, which affects the effectiveness of leveling operations.
Innovation Solution
A shoe control system that includes a controller and actuators to determine the direction of travel and control the shoes to disengage from the ground surface during rearward movement, using a combination of electromechanical and hydraulic actuators, and sensors to manage the position and engagement of the shoes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If shoes are kept engaged with the ground surface during rearward movement, then the dozer blade can effectively level the ground material, but the shoes form indentations in the ground surface
Solution Approach 1:
The shoe control system dynamically adjusts the engagement state of the shoes with the ground surface based on the direction of travel. During rearward movement, the controller receives signals and actuates the shoe actuators to disengage the shoes from the ground surface, preventing indentation formation. During forward movement, the shoes are engaged to provide stabilization and prevent blade digging. This dynamic state change resolves the contradiction by making the shoe engagement conditional rather than static.
Solution Approach 2:
The system incorporates a controller that receives signals indicating the direction of travel and uses this feedback to control the shoe actuators. The controller monitors the operational state and adjusts shoe engagement accordingly - disengaging during rearward movement to prevent harm, and engaging during forward movement to maintain productivity. This feedback mechanism enables the system to automatically resolve the technical contradiction based on real-time operational conditions.
2Object-generated harmful factors
If shoes are disengaged from the ground surface during rearward movement, then indentation formation is prevented, but the leveling effectiveness is reduced
Solution Approach 1:
The shoe control system implements dynamic engagement control where shoes are disengaged during rearward movement to prevent harm, and engaged during forward movement to maximize productivity. The system transitions between these states based on travel direction signals, ensuring that the shoe engagement state is optimized for each operational phase rather than remaining in a fixed state.
Solution Approach 2:
The system employs periodic engagement and disengagement of the shoes corresponding to the periodic forward and rearward movement cycles of the dozer blade assembly. During each rearward movement cycle, shoes are disengaged to prevent harm; during each forward movement cycle, shoes are engaged to maintain productivity. This periodic action pattern allows the system to alternately prioritize harm prevention and productivity based on the operational cycle phase.
3Ease of operation
If a control system with actuators and sensors is implemented, then shoe engagement control is improved, but device complexity increases
Solution Approach 1:
The control system is integrated with the existing dozer blade assembly control architecture, using the same controller that manages other blade functions. The shoe actuators utilize the existing hydraulic system of the work vehicle, and the direction of travel signals are obtained from the same control system that operates the vehicle. This multi-functionality approach reduces overall system complexity by reusing existing components rather than adding entirely separate systems.
Solution Approach 2:
The shoe control system operates autonomously based on direction of travel signals it receives from the vehicle's existing control system. The controller automatically actuates the shoe actuators to engage or disengage shoes based on the operational phase, without requiring manual intervention. This self-service operation simplifies the user interface while maintaining sophisticated control functionality.
Data Source
AI summary
A shoe control system for a dozer blade assembly includes a controller having a processor and a memory. The controller is configured to determine a direction of travel of the dozer blade assembly. The controller is also configured to control an actuator to drive a shoe of the dozer blade assembly to disengage a ground surface in response to determining the direction of travel is rearward.