Motor Grader Blade Lift Tool with Anti-Slip Notches
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Solution Overview
Problem
Existing methods for moving motor grader blades, such as manual lifting and conventional hand trucks, are inadequate as they often result in injuries and lack balance, particularly in smaller workplaces without access to cranes or trained operators.
Innovation Solution
A blade lift tool with a handle bar mechanically coupled to a center riser, tires, and pins, which provides balance and safety grips, along with anti-slip notches to prevent the blade from falling, allowing for easier handling and positioning of motor grader blades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual lifting by two strong people is used, then the blade can be moved, but the risk of injury increases and training requirements increase
Solution Approach 1:
The patent introduces a hand truck as an intermediary device between the operator and the blade. The hand truck provides mechanical advantage through its wheel and handle structure, allowing one person to move the blade safely without direct manual lifting, thus reducing injury risk while maintaining ease of operation.
Solution Approach 2:
The hand truck is designed to be self-supporting with a stable base and wheel structure that allows it to carry and move the blade independently. The device has a center of gravity and balance design that enables it to handle the blade weight without requiring multiple operators, making the system self-sufficient for safe blade movement.
2Reliability
If a crane lift is used, then the blade can be moved safely, but the device complexity and facility requirements increase
Solution Approach 1:
The patent provides a simple, inexpensive hand truck design that can be easily manufactured and deployed without requiring expensive crane equipment. The hand truck uses basic mechanical components like wheels, handles, and a frame structure that are much simpler and more affordable than crane systems, making safe blade movement accessible to smaller workplaces.
Solution Approach 2:
The invention extracts the essential lifting function from complex crane systems and isolates it into a simple hand truck mechanism. By removing the complexity of cranes, cables, and licensed operators, the patent retains the core safety function of controlled blade movement through a much simpler device that any worker can operate.
3Ease of operation
If conventional hand trucks are used, then the blade can be moved, but the balance and handling stability are insufficient
Solution Approach 1:
The hand truck is designed with asymmetric weight distribution and a specific geometric configuration of its frame, wheels, and handle. The center of gravity is positioned to provide optimal balance for carrying the blade, and the handle angle and wheel placement are asymmetrically arranged to match the blade's weight distribution, creating natural handling stability that prevents tipping and improves control.
Solution Approach 2:
The patent applies local quality by providing specific structural features at critical locations: reinforced wheel hubs for stability, a centrally positioned handle for balance control, and a base structure with appropriate width and height ratios. These localized structural optimizations ensure that each component contributes to overall balance and handling stability where it is most needed.
Data Source
AI summary
A motor grader blade lift tool comprises a handle mechanically coupled to a center riser. The center riser is further mechanically coupled to a bottom round tubing. The bottom round tubing is further mechanically coupled to a bottom bar square tubing. The bottom bar square tubing is mechanically coupled to a first blade stop and a second blade stop. The first blade stop is mechanically coupled to a first pin and the second blade stop is mechanically coupled to a second pin. The first pin and the second pin can fit through cavities on a motor grader blade to support the motor grader blade on the blade lift tool.