Automatic Tool Tilt Command System for Telehandlers
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Solution Overview
Problem
Current automatic tool tilt command systems for telehandlers and similar equipment require tilt compensation cylinders and level sensors with feedback systems, which increase complexity and cost while compromising stability and safety.
Innovation Solution
An automatic tool tilt command system that eliminates the need for tilt compensation cylinders and level sensors by using electronic control valves and a control unit to maintain a predetermined fluid flow ratio between the boom movement and tool tilting, ensuring stable tool inclination during boom movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tilt compensation cylinders and level sensors with feedback systems are used, then tool inclination stability is maintained, but system complexity and manufacturing cost increase
Solution Approach 1:
The invention extracts and eliminates the tilt compensation cylinder and level sensor from the system, replacing them with an electronic control system that uses the existing boom control signals to directly actuate the tool tilt, thereby reducing mechanical complexity while maintaining inclination stability
Solution Approach 2:
The invention replaces the mechanical tilt compensation cylinder and level sensor feedback system with an electronic control system that uses electronic control valves and a controller to achieve tool tilt based on boom movement commands, substituting mechanical complexity with electronic control
2Reliability
If tilt compensation cylinders and level sensors are used, then tool inclination stability is maintained, but manufacturing cost increases
Solution Approach 1:
The invention removes the expensive tilt compensation cylinder and level sensor components from the system, replacing them with electronic control elements that leverage existing system components, thereby reducing manufacturing cost while preserving tool inclination stability
Solution Approach 2:
The invention creates a control signal copy of the boom movement command and uses it to actuate the tool tilt in parallel, eliminating the need for expensive physical sensors and mechanical compensation devices while achieving the same functional result
3Device complexity
If electronic control valves with predetermined flow ratio are used, then system complexity is reduced, but control precision must be maintained
Solution Approach 1:
The invention changes the control parameter from position-based feedback (using level sensors) to flow ratio-based control using electronic control valves with predetermined flow ratios, simplifying the system while maintaining precision through standardized valve characteristics
Solution Approach 2:
The invention pre-configures the electronic control valves with predetermined flow ratios that correspond to the desired tool inclination, eliminating the need for complex real-time calculations or feedback adjustments while maintaining control precision
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
This solution maintains the stability and safety of tool inclination without the need for additional hardware, reducing manufacturing costs and system complexity while ensuring consistent performance across various operational conditions.
Implementation Method 1
a hydraulic system, e.g., with a pump, operatively connected to the first and second electronic control valves
Data Source
AI summary
An automatic tool tilt command system for a boom moveably connected with one end to a chassis of a working machine, wherein a tiltable tool is attachable to the other end. A first electronic control valve for controlling a fluid flow to and from a lift cylinder for moving the boom and a second electronic control valve for controlling a fluid flow to and from a tilt cylinder for tilting the tool. A control unit receives signals to move the boom and transmits signals to the first electronic control valve in order to move the boom. In parallel the control unit transmits signals to the second electronic control valve which are based on a predetermined fluid flow ratio defined by the fluid flow for the boom movement and the fluid flow for tool levelling, so that the tool maintains its inclination angle with respect to the horizontal.