Motor Grader Self-Extraction via Automated Blade and Frame Control
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Solution Overview
Problem
Motor graders often experience wheel slippage and loss of traction during grading operations, especially in ditches or on slopes with poor underfoot conditions, leading to productivity losses and potential further damage to the surface being treated.
Innovation Solution
A system and method for extracting a motor grader from a location with reduced traction to a location with greater traction, utilizing a controller that automatically executes a sequence of operations including adjustments to the articulation angle, steering, blade position, and propulsion to reposition the wheels on the second location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the motor grader continues operation in a location with poor traction, then the grading work can proceed without interruption, but wheel slippage occurs causing loss of productivity and potential damage to the surface being treated
Solution Approach 1:
The system performs preliminary detection of traction conditions through wheel slip monitoring before critical failure occurs. When wheel slip is detected exceeding a threshold, the system proactively initiates extraction maneuvers by articulating the frame and adjusting blade position to relocate wheels to better traction areas, preventing productivity loss and surface damage
2Reliability
If the motor grader uses additional equipment to extract itself from a location with poor traction, then the machine can be recovered from stuck conditions, but the complexity of the operation increases and productivity is further reduced
Solution Approach 1:
The motor grader is equipped with self-extraction capability through automated control systems that monitor wheel slip conditions and independently execute extraction maneuvers. The controller automatically articulates the frame, positions the blade, and controls propulsion to relocate wheels to areas with better traction, eliminating the need for external recovery equipment and reducing operational complexity
3Reliability
If the motor grader uses additional equipment to extract itself from a location with poor traction, then the machine can be recovered from stuck conditions, but the time required for recovery increases resulting in substantial loss of productivity
Solution Approach 1:
The system continuously monitors wheel slip conditions and detects traction problems early, initiating extraction maneuvers before the machine becomes completely stuck. This preliminary detection and response significantly reduces the time required for recovery by addressing traction issues at their earliest stage
Solution Approach 2:
The automated self-extraction system executes extraction maneuvers independently without requiring external equipment or additional operational steps. The controller automatically coordinates frame articulation, blade positioning, and propulsion adjustments, minimizing the time from detection to successful recovery
4Stability of the object's composition
If the motor grader wheels slip on poor traction surfaces, then the machine can maintain its position in the ditch, but the surface being treated is marred or further damaged
Solution Approach 1:
The system detects wheel slip conditions early and proactively initiates extraction maneuvers before significant surface damage occurs. By monitoring wheel slip thresholds and responding preemptively, the system prevents the harmful effect of marred surfaces while maintaining machine position stability
Data Source
AI summary
A system for extracting a motor grader from a location with reduced traction includes the motor grader having articulated front and rear frames supported on front and rear wheels, respectively, and a blade extending from the frame toward the surface underlying the grader. A plurality of blade articulation structures are adapted to articulate the blade relative to the frame. A plurality of sensors are provided and a steering mechanism, power source and control system having a controller. The controller is configured to receive the plurality of signals and perform an extraction procedure to reposition the motor grader. The extraction procedure includes automatic execution of a sequence of operations including a plurality of modification of an articulation angle of the front and rear frames, a steering angle, a position of the blade, a disposition of the blade, propulsion of one or more of the wheels, and direction of propulsion.