Scissor Stabilizer Retraction Control for Telescopic Handlers
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Solution Overview
Problem
Existing telescopic handlers require lengthy and inefficient stabilizer retraction sequences, which hinder the efficient use of these expensive and bulky machines due to the time-consuming nature of transitioning between operating and non-operating configurations.
Innovation Solution
A system with synchronized movement of telescopic stabilizing arms using hydraulic cylinders and a processing unit to simultaneously rotate and slide segments of the stabilizing arms, allowing for a faster transition between active and inactive configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the stabilisers are retracted using the prior art sequence, then the arms are correctly recovered, but the retraction time is excessive and operational efficiency is reduced
Solution Approach 1:
The control system initiates the rotation of stabilising arms towards the raised position before the sliding members are fully retracted. This preliminary action allows overlapping of operations where arms begin rotating while sliding members are still being retracted, thereby reducing total retraction time without compromising safety or correctness of the recovery sequence
Solution Approach 2:
The system dynamically adjusts the retraction sequence by allowing arms to rotate to an intermediate position and then back to operating position while sliding members are retracted. This dynamic, multi-phase approach replaces the static sequential approach, enabling faster recovery by utilizing parallel operations and optimizing the timing of each movement phase
2Ease of operation
If the stabilising arms are rotated upwards to recover, then the wheels rest on the ground, but the sliding members remain extracted which delays complete retraction
Solution Approach 1:
The control system commands the rotation of stabilising arms towards the raised position as a preliminary action before the sliding members are fully retracted to their retracted position. This allows the arms to begin their rotation early, and the system manages the sequence so that complete retraction is achieved faster by overlapping these movements in time
Solution Approach 2:
The recovery operation is divided into periodic phases: first rotating arms towards raised position, then retracting sliding members, and finally completing the rotation to horizontal position. This periodic, staged approach allows for optimized timing and parallel execution of movements, reducing total recovery time while maintaining ease of operation through automated control
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
Significantly reduces the time required for stabilizer retraction, enhancing the operational efficiency and usability of telescopic handlers by minimizing the machine's lateral dimensions during inactive configurations.
Implementation Method 1
A system with synchronized movement of telescopic stabilizing arms using hydraulic cylinders
Data Source
AI summary
A method for controlling a scissor stabiliser of self-propelled operating machines that includes a pair of rotatable telescopic stabilising arms and each arm includes a first segment rotatable between a raised position and an operating position; a second segment, slidable relative to the first segment and provided with a foot for contact with the ground; wherein the stabiliser can be activated between an active configuration and an inactive configuration. The stabilisers are brought from the active configuration to the inactive configuration by movements which include a synchronous phase in which they actuate simultaneously in at least one stretch of the rotation of the first segments, in the sense that it moves from the operating position to the raised position and at least one stretch of the sliding of the second segments, in the direction from the extended position to the closed position.