Construction Machine Swing Axle Locking for Stability
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Solution Overview
Problem
Construction machines, such as ground milling machines, are prone to tipping on beveled ground due to their high center of gravity and the design of their traveling axles, which can lead to safety risks and machine damage.
Innovation Solution
A control device that monitors the load on the traveling devices of the locking axle and blocks the height adjustment of the swing axle when the load falls below or exceeds a threshold value, converting the swing axle into a locking axle to provide additional resting points and increase stability, thereby preventing tipping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the swing axle is used to compensate for ground unevenness, then the machine can adapt to varying terrain, but the machine becomes unstable and prone to tipping on beveled ground
Solution Approach 1:
The system dynamically switches between two operational modes: swing axle mode for terrain adaptation and locked axle mode for stability. The control device monitors load distribution and automatically transitions the swing axle from a height-adjustable state to a locked state when tipping risk is detected, optimizing the balance between adaptability and stability based on real-time conditions
Solution Approach 2:
The system changes the operational parameter of the swing axle from 'height-adjustable' to 'locked' based on load distribution thresholds. When the load on a traveling device falls below or exceeds a predetermined threshold, the control device modifies the axle's state, transforming it from a dynamic terrain-compensation mechanism to a static stability-providing structure
2Ease of operation
If the center of gravity is positioned high for operational requirements, then the machine achieves better visibility and access, but the machine becomes more prone to tipping
Solution Approach 1:
The control device continuously monitors the load distribution on traveling devices and uses this feedback to detect tipping risks. When load imbalance indicates potential tipping, the system automatically responds by locking the swing axle, creating a closed-loop control system that maintains stability despite the high center of gravity configuration
Solution Approach 2:
The system takes preliminary action by locking the swing axle before actual tipping occurs. By monitoring load distribution thresholds and preemptively transitioning to locked axle mode, the system prevents the harmful effect of tipping while maintaining the beneficial high center of gravity position for operation
Data Source
AI summary
The present invention relates to a construction machine, in particular a ground milling machine, with a drive motor, a machine frame supported by a traveling gear with traveling devices, and an operator platform arranged on the machine frame, wherein the traveling gear has a front and a rear traveling gear axle, and wherein at least one of the traveling gear axles is configured as a locking axle with two traveling devices which are height-adjustable relative to the machine frame independently of one another and can be locked in an operating position, and at least one further traveling gear axle is configured as a swing axle such that the traveling devices of the swing axle are jointly height-adjustable relative to the machine frame, and a height adjustment of one traveling device of the swing axle leads to an opposite height adjustment of another traveling device of the swing axle, wherein a control device is provided which is configured such that it detects the load on at least one of the traveling devices of the locking axle as a control variable and, when the load on the traveling device of the locking axle falls below or exceeds a threshold value, blocks the joint height adjustment of the traveling devices of the swing axle relative to the machine frame. Moreover, the present invention relates to increasing the stability of such a construction machine.