Grading Tool Double Fulcrum Mechanism for Light Duty Machines
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Solution Overview
Problem
Conventional grading tools for light duty work machines are limited by horsepower, load capacity, and adjustability, making them less effective for grading various ground surfaces.
Innovation Solution
A tow-behind grading tool with an adjustable frame and suspension system, allowing for independent pitch and elevation adjustments of the grading box, and a double fulcrum mechanism to optimize force distribution and ground engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional grading tools are used on light duty work machines, then the machine can operate with standard equipment, but the grading effectiveness is limited by horsepower and load capacity
Solution Approach 1:
The patent implements a dual-adjustment mechanism that allows the grading box to be independently adjusted in elevation and pitch during operation. This dynamic adjustability enables the tool to adapt to varying ground conditions and maintain optimal grading performance without requiring increased horsepower, directly resolving the contradiction between grading effectiveness and power limitations.
Solution Approach 2:
The invention changes the operational parameters of the grading tool by introducing independent elevation and pitch adjustment capabilities. This allows the same machine to effectively grade diverse surfaces by modifying the tool's geometric parameters rather than increasing power, thereby improving grading effectiveness within the existing horsepower constraints.
2Adaptability or versatility
If conventional grading tools are used, then the structure remains simple, but adjustability and responsiveness are limited
Solution Approach 1:
The patent segments the adjustment functions into two independent mechanisms: one for elevation adjustment and another for pitch adjustment. This segmentation allows each mechanism to be optimized for its specific function, providing comprehensive adjustability while maintaining manageable complexity through functional decomposition.
Solution Approach 2:
The invention introduces dynamic adjustability through two independent adjustment mechanisms that allow real-time modification of the grading box's elevation and pitch. This transforms a static, simple structure into a dynamic system with enhanced adaptability, enabling the tool to respond to varying ground conditions without excessive complexity.
3Force
If the grading box weight is increased to improve ground engagement, then grading performance improves, but the machine may stall under excessive load
Solution Approach 1:
The patent applies local quality by concentrating the grading force where it is most needed through the double fulcrum mechanism. This mechanical advantage system allows the grading box to generate sufficient ground engagement force at the cutting edge without requiring a proportional increase in overall box weight, thereby avoiding excessive load on the light duty machine.
Solution Approach 2:
The invention employs a double fulcrum mechanism that acts as a mechanical counterbalance system. This mechanism optimizes force distribution by using the machine's own weight more effectively, reducing the need for additional grading box weight while maintaining adequate ground engagement force, thus preventing machine stalling.
4Force
If a single fulcrum mechanism is used, then the structure is simpler, but force distribution and ground engagement are suboptimal
Solution Approach 1:
The patent segments the fulcrum mechanism into two separate fulcrums, each serving a specific function in force distribution. This segmentation allows for optimized force application at different points in the mechanism, improving overall ground engagement efficiency while keeping each individual fulcrum relatively simple in design.
Solution Approach 2:
The invention changes the mechanical parameters of the fulcrum system by transitioning from a single fulcrum to a double fulcrum configuration. This modification optimizes the force distribution characteristics and mechanical advantage, enabling better ground engagement without proportionally increasing structural complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the ability to effectively grade diverse surfaces by improving adjustability, force application, and weight distribution, accommodating varying ground conditions and preventing machine stalling.
Implementation Method 1
a suspension assembly rotatably coupled with the second arm, the suspension assembly including a spring operably coupled with the lever; the spring being compressible to accommodate relative motion between the lever and the grading box
Data Source
AI summary
A grading tool comprises a frame extending between a hitch and a ground contacting member. A first adjustment mechanism and a lever are coupled with the frame. A suspension assembly including a spring is coupled with the lever. A grading box assembly is coupled with the frame and with the suspension assembly. The spring is compressible to accommodate motion between the lever and the grading box assembly. A second adjustment mechanism is coupled with the frame and the grading box assembly and is adjustable to selectably increase and decrease in length. A fixation member is coupled with the grading box assembly and is selectably coupleable with the frame to fix a first side of the grading box assembly vertically relative to the frame while allowing vertical movement of a second side of the of the grading box assembly relative to the frame.