Scissor Stabilizer Arm Control for Uneven-Ground Retraction
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Solution Overview
Problem
Existing stabilizing systems for self-propelled operating machines, such as telescopic handlers, face issues with simultaneous arm movements that can lead to potential danger, especially in non-planar zones, and are hindered by obstacles or ground irregularities, compromising stability and safety.
Innovation Solution
A system with individually controllable telescopic stabilizing arms, actuated by hydraulic cylinders and controlled by a processing unit, allows for non-symmetrical movement sequences to adapt to ground conditions, preventing arm interference and reducing the time required to transition between active and inactive configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If simultaneous symmetrical movements of both arms are used, then the structure is simple and operation is straightforward, but stability is compromised in non-planar zones and potential danger arises
Solution Approach 1:
The patent divides the stabilizer system into independently controllable segments (left and right arms with separate actuators), allowing each arm to be controlled individually rather than as a single synchronized unit. This segmentation enables adaptive movement sequences that can respond to uneven terrain conditions.
Solution Approach 2:
The control system dynamically adjusts the movement sequence of stabilizer arms based on detected ground conditions. The system transitions from fixed simultaneous movement to adaptive sequential or differential movement patterns, making the stabilizer behavior dynamic and responsive to environmental variations.
2Productivity
If simultaneous return of both arms is implemented, then the recovery process is rapid and efficient, but arm interference occurs and obstacles may prevent complete rotation
Solution Approach 1:
The control system performs preliminary detection of ground conditions and potential obstacles before initiating the arm return sequence. Based on this preliminary information, it pre-adjusts the movement sequence to avoid interference and ensure complete rotation, preventing problems before they occur.
Solution Approach 2:
The patent applies different movement characteristics to different arms based on local conditions. Each arm can move at different speeds, follow different trajectories, or pause at different positions according to the specific terrain conditions detected in its operational zone, rather than following a uniform movement pattern.
3Device complexity
If fixed movement sequences are used, then the control system is simple, but adaptability to different ground conditions and obstacles is reduced
Solution Approach 1:
The patent incorporates sensors that detect ground conditions, arm position, and potential obstacles, feeding this information back to the control system. The control system uses this feedback to dynamically adjust the movement sequence, creating a closed-loop control system that adapts to varying conditions while maintaining manageable complexity through algorithmic decision-making.
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
Enhances stability and safety by allowing independent control of stabilizing arms, adapting to uneven terrain, and reducing the time needed for configuration changes, thus improving operational efficiency and safety.
Implementation Method 1
Each arm (2) is provided with a longitudinal axis C... each include a pair of telescopic stabilising arms (2)... with a single or twin sliding member
Data Source
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AI summary
Described is a stabilising system for a self-propelled operating machine (1), such as a telescopic handler or the like, comprising at least two scissor stabilisers (10), designed to adopt an active configuration, in which they stabilise the machine (1) raising the wheels (11) of the machine (1) from the ground, and an inactive configuration, in which said wheels (11) are rested on the ground, wherein: each stabiliser (10) comprises at least one pair of rotatable telescopic stabilising arms (2a, 2b); each arm (2a, 2b) comprises a first segment (21a, 21b), rotatable between a raised position and an operating position, and a second segment (22a, 22b), slidable relative to the first segment (21a, 21b) between an extended position and a closed position and provided with a foot (20) for contact with the ground; first movement means (3) are designed for rotating the first segments (21a, 21b) between said raised position and said operating position; second movement means are designed for moving the second segments (22a, 22b) between said closed position and said extended position; characterised in that it comprises a processing unit configured to control said first and second movement means in the following steps: rotating the first segments (21a, 21b) from the operating position to an intermediate position; sliding of the second segment (22a) of a first arm (2a) to the closed position; rotating the first segment (21b) of a second arm (2b) from said intermediate position to the raised position; sliding of the second segment (22b) of the second arm (2b) to the closed position; rotating the first segment (21a) of the first arm (2a) from the intermediate position to the final position.