Grading Tool with Adjustable Pitch and Float Mode
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Solution Overview
Problem
Conventional earth moving tools lack versatility and compatibility with various work machines, particularly in grading operations, and fail to provide effective passive float mode operation while maintaining active control over working depth.
Innovation Solution
A grading tool design featuring a frame with ground-contacting wheels, a comb, and a drag bar assembly, coupled with a work machine, allowing for adjustable pitch and rotation to enable both active and float mode operations, with hydraulic actuators for precise control over depth and motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional earth moving tools are designed for specific grading applications, then they achieve specialized performance for that application, but they lack versatility to perform multiple grading functions and operations
Solution Approach 1:
The grading tool is designed with multiple working components including a comb assembly with teeth for grading and scarifying, a drag bar assembly for leveling, and a rear blade for scraping. These components can be selectively positioned and adjusted to perform various grading functions such as forward grading, reverse grading, scarifying, and surface leveling, allowing a single tool to replace multiple specialized tools
Solution Approach 2:
The tool incorporates adjustable components including the comb assembly that can be raised and lowered via hydraulic actuators, drag bar assembly with adjustable angle and position, and rear blade with variable inclination. These dynamic adjustments allow the tool to adapt to different grading applications and ground conditions, transforming a static single-function tool into a dynamic multi-function system
2Ease of operation
If the grading tool is designed for active operator control over working depth, then precise depth control is achieved, but the tool cannot simultaneously provide passive float mode operation where the tool moves freely in response to ground surface changes
Solution Approach 1:
The hydraulic actuator system controlling the comb assembly and other working components is designed with float mode capability, allowing the operator to select between active control (where the actuator maintains precise depth positioning) and passive float mode (where the actuator allows free movement in response to ground surface variations). This dynamic control mode switching enables the same system to provide both precise depth control and adaptive float operation
Solution Approach 2:
The control system allows changing the operational parameter of the hydraulic actuators from active positioning mode to passive float mode. By changing the control parameter (from active depth maintenance to passive movement allowance), the system transitions between providing precise depth control and enabling free movement over uneven surfaces, resolving the contradiction between control precision and float capability
3Adaptability or versatility
If the grading tool is designed with multiple adjustable components for various grading operations, then operational versatility is improved, but the device complexity increases
Solution Approach 1:
The grading tool is divided into separate modular assemblies including the comb assembly, drag bar assembly, and rear blade assembly, each with its own adjustment mechanisms. This segmentation allows each component to be independently adjusted and maintained, and simplifies the overall control system by dividing it into manageable modules rather than a single complex integrated system
Solution Approach 2:
Multiple working components (comb, drag bar, rear blade) are integrated into a single tool platform that can be attached to various work machines. This universal design allows the same base structure to support multiple grading functions through component selection and adjustment, reducing the need for entirely separate specialized tools and thereby managing complexity through shared infrastructure
Data Source
AI summary
One embodiment includes a grading tool structured for attachment to a work machine. The grading tool includes a frame, ground contacting wheels coupled with the frame, a comb coupled with the frame and extending from a first end of the frame, and a coupling member coupled with the frame and structured to be accessible from a second end of the frame. When the ground contacting wheels are in contact with the ground a depth of penetration of the comb into the ground surface is adjustable by changing the pitch of the grading tool.