Lifting Vehicle Cab Tilt Control via Load Position Feedback
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Solution Overview
Problem
Operators of lifting vehicles face challenges in maintaining a clear view of the load due to its varying position, requiring continuous manual adjustments of the cab tilt, especially when the load is outside their field of vision at high tilt angles and boom extensions.
Innovation Solution
An automatic tilt adjustment system that uses sensors and an electronic control unit to dynamically adjust the control cab's tilt angle based on the load's position, ensuring it remains within the operator's field of vision without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cab tilt angle is increased to improve the operator's view of the load, then the load viewing conditions are improved, but the operator must continuously manually adjust the cab position when the load position changes
Solution Approach 1:
The system enables the cab to automatically adjust its tilt angle based on load position feedback. Sensors detect the load position and the control unit automatically commands the hydraulic actuator to adjust the cab tilt, eliminating the need for continuous manual operator intervention and allowing the system to serve itself
Solution Approach 2:
The system implements a closed-loop feedback mechanism where sensors continuously monitor the load position and transmit this information to the control unit. The control unit processes this feedback and automatically adjusts the cab tilt angle accordingly, creating a self-regulating system that maintains optimal viewing conditions without manual intervention
2Ease of operation
If a hydraulic actuator is used to tilt the cab, then the cab tilt function is achieved, but the system requires continuous manual operation to maintain optimal viewing angle
Solution Approach 1:
The system replaces the purely mechanical manual control system with an automated electromechanical-hydraulic system. Electronic sensors and a control unit automatically command the hydraulic actuator, substituting manual mechanical operation with automated electronic control and hydraulic actuation
Solution Approach 2:
The cab tilt system becomes self-regulating through automatic detection of load position and self-adjustment of cab angle. The system monitors its own operational state and automatically corrects the cab position without requiring external manual intervention, making the system serve itself
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 enhances operator safety and comfort by maintaining the load in view, reducing the need for manual cab orientation and preventing distractions during load handling operations.
Implementation Method 1
The control cab (26) can be tilted with respect to the chassis (12) by varying the tilt angle beta of the control cab with respect to the chassis, in particular by the action of a hydraulic actuator (28)
Data Source
AI summary
A lifting vehicle includes: a chassis, a telescopic boom articulated to the chassis and provided at a distal end with a mounting for attaching implements for handling a load, a control cab, at least one cab tilt actuator configured to vary a tilt angle of the cab with respect to the chassis, and an automatic tilt adjustment system configured to control said cab tilt actuator to automatically vary a tilt angle of the control cab with respect to the chassis as a function of the position of the load.