Service Tool for Blade Calibration on Motor Graders
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Solution Overview
Problem
Current methods for calibrating blade wear on motor graders are inefficient and prone to inconsistency due to the manual measurement process, which is challenging due to the blade's position and access difficulties, leading to inaccurate blade position calibration.
Innovation Solution
A service tool with a curved portion and notch is used to measure the vertical and horizontal distances from the bolt head to the cutting edge, allowing for precise calibration by marking these measurements on a grid for input into a grade control system, enabling accurate blade position adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual measurement with carpenter's square and level is used, then measurement capability is provided, but measurement precision and consistency deteriorate due to awkward access and unstable positioning
Solution Approach 1:
The service tool acts as an intermediary device between the technician and the blade measurement task. The tool includes a positioning member that interfaces with the blade geometry and a measurement member with grid markings that provide reference surfaces. This intermediary structure stabilizes the measurement process and eliminates the need for the technician to manually stabilize instruments while crouching, thereby improving both precision and ease of operation.
Solution Approach 2:
The patent replaces the traditional mechanical measurement system (carpenter's square and level) with a specialized service tool that integrates positioning and measurement functions. The service tool uses a grid-marked measurement member with reference surfaces that substitute for the separate mechanical instruments, providing more consistent and easier-to-use measurement capability while maintaining accuracy.
2Ease of operation
If technician crouches down to measure blade, then access to blade is achieved, but measurement stability deteriorates due to difficult positioning and instrument slippage
Solution Approach 1:
The positioning member of the service tool serves as a stable intermediary that interfaces with the blade geometry. It includes features that positively engage with the blade to provide consistent positioning regardless of technician position. The measurement member with its grid markings and reference surfaces provides a stable measurement platform that does not slip or move during use, thereby ensuring measurement reliability while maintaining easy access.
Solution Approach 2:
The service tool is designed with pre-configured positioning features and reference surfaces that are prepared in advance. The positioning member is shaped to fit specific blade geometries, and the measurement member includes pre-marked grid lines and reference surfaces. This preliminary preparation eliminates the need for the technician to stabilize instruments during crouching positions, ensuring consistent and reliable measurements.
3Productivity
If traditional manual measurement process is used, then blade calibration is performed, but calibration accuracy deteriorates due to inconsistent measurements
Solution Approach 1:
The service tool provides a consistent intermediary measurement system that eliminates variability in manual measurement. The positioning member ensures repeatable positioning on the blade, while the measurement member with its grid markings provides consistent reference surfaces. This intermediary system produces consistent measurement results across multiple calibrations, thereby improving both productivity and calibration accuracy simultaneously.
Solution Approach 2:
The patent replaces the variable manual measurement process with a standardized service tool system. The service tool uses a grid-marked measurement member with reference surfaces that provide consistent, repeatable measurements. This substitution of the manual process with a standardized tool system ensures that calibration accuracy is maintained while improving productivity through more efficient measurement.
Data Source
AI summary
A service tool and method of using for calibrating a position of a cutting edge of a blade. The service tool may comprise an inward-side face disposed between a first face and a second face. The inward-side face may include a curved portion, a leg portion and a notch configured to receive the cutting edge. The first face includes a curved edge, a plurality of horizontal lines and a plurality of vertical lines. When the cutting edge is received in the notch, and the curved portion abuts the top face of a bolt, the plurality of horizontal lines is configured to measure a vertical distance from a center of the top face to the cutting edge, and the plurality of vertical lines is configured to measure a horizontal distance from the center of the top face to the cutting edge.