Hydraulic Pressure Amplification for Loader Breakout Force
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Solution Overview
Problem
Hydraulic systems on loader equipment, such as bucket loaders, face limitations in breakout force due to geometric constraints, and existing solutions like Z-bar linkages compromise cab accessibility, visibility, and maintenance.
Innovation Solution
A hydraulic circuit that includes a primary working cylinder and a secondary power amplification cylinder, with valves to selectively apply power from the amplification cylinder to the working cylinder, increasing the operating pressure and force on the rod side of the working cylinder piston.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If Z-bar linkages are used to increase breakout force, then the breakout force is improved, but cab accessibility and visibility are worsened
Solution Approach 1:
The patent replaces the mechanical Z-bar linkage system with a hydraulic power amplification system. Instead of using mechanical linkages to multiply force, the invention uses hydraulic pressure amplification through a secondary cylinder to provide the necessary breakout force, thereby eliminating the need for complex mechanical linkages that obstruct the operator's view and access.
Solution Approach 2:
The patent employs a hydraulic power amplification circuit where a secondary power amplification cylinder uses hydraulic pressure to amplify the force applied to the working cylinder. This hydraulic approach allows for force multiplication without requiring additional mechanical linkages, thus maintaining cab accessibility and visibility while achieving the desired breakout force.
2Force
If Z-bar linkages are used to increase breakout force, then the breakout force is improved, but maintenance complexity is worsened
Solution Approach 1:
The patent replaces the mechanical Z-bar linkage system with a hydraulic power amplification system. Instead of using mechanical linkages to multiply force, the invention uses hydraulic pressure amplification through a secondary cylinder to provide the necessary breakout force, thereby eliminating the need for complex mechanical linkages that obstruct the operator's view and access.
Solution Approach 2:
The power amplification cylinder serves multiple functions: it amplifies force, controls the working cylinder, and can be integrated into the existing hydraulic system. This multi-functionality reduces the need for separate maintenance points compared to the Z-bar linkage system, which requires multiple grease points and mechanical joint maintenance.
3Force
If system pressure is raised through the main valve to generate more force, then the breakout force is improved, but system cost is worsened
Solution Approach 1:
The patent employs a hydraulic power amplification circuit where a secondary power amplification cylinder uses hydraulic pressure to amplify the force applied to the working cylinder. This hydraulic approach allows for force multiplication without requiring additional mechanical linkages, thus maintaining cab accessibility and visibility while achieving the desired breakout force.
Solution Approach 2:
The patent changes the system parameter by introducing a power amplification factor through the secondary cylinder. Instead of simply increasing the main system pressure throughout the entire hydraulic system (which would require more expensive valves and plumbing), the invention locally amplifies pressure only where needed, reducing overall system cost while achieving the required breakout force.
4Force
If main system pressure is increased to provide more force, then the breakout force is improved, but valve and plumbing cost are worsened
Solution Approach 1:
The patent changes the system parameter by introducing a power amplification factor through the secondary cylinder. Instead of simply increasing the main system pressure throughout the entire hydraulic system (which would require more expensive valves and plumbing), the invention locally amplifies pressure only where needed, reducing overall system cost while achieving the required breakout force.
Solution Approach 2:
The patent segments the hydraulic system into a primary working cylinder circuit and a secondary power amplification circuit. This segmentation allows the pressure amplification to be applied only to the specific working cylinder that requires additional breakout force, rather than increasing pressure throughout the entire system. This reduces the requirements for expensive high-pressure valves and plumbing in other parts of the system.
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
The system provides enhanced breakout force for bucket loaders, enabling tasks like breaking concrete, removing stumps, and high-force digging without compromising cab accessibility or increasing maintenance complexity.
Implementation Method 1
The pressure amplification cylinder is configured to selectively provide hydraulic fluid to the working cylinder to amplify an operating pressure of the working cylinder. When the pressure amplification cylinder is providing the hydraulic fluid to the working cylinder, the second rod side chamber of the pressure amplification cylinder provides the hydraulic fluid to the first rod side chamber of the working cylinder.
Data Source
AI summary
Hydraulic power amplification systems and methods configured to selectively supply an interval of increased force to a working hydraulic cylinder. The systems generally comprise a working cylinder and a pressure amplification cylinder. The rod side chamber of the working cylinder is in fluid communication with the rod side chamber of the working cylinder, such that shifting of the pressure amplification cylinder piston increases the power applied to the rod side of the working cylinder piston. The hydraulic power amplification systems and methods are particularly useful for providing supplemental breakout force to working cylinders on loader equipment, such as bucket loaders.