Milling Machine Kick-Back Prevention via Lifting Column Weight Monitoring
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Solution Overview
Problem
Existing milling machines lack an effective system to prevent kick-back events by automatically disabling the milling drum when the lifting column does not provide adequate support, leading to potential loss of steering or braking control and machine damage.
Innovation Solution
A sensor system mounted on the lifting column, connected to a controller, which monitors the weight distribution and automatically stops the milling drum's rotation if it determines that the lifting column is not supporting a predetermined portion of the machine's weight, anticipating a kick-back event.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the milling drum operates without adequate support from the lifting column, then the milling operation can continue, but the machine experiences kick-back events causing loss of steering or braking control and potential damage
Solution Approach 1:
The sensor system detects insufficient lifting column support before a kick-back event occurs and automatically stops the milling drum rotation in advance, preventing the harmful event rather than reacting after damage occurs
Solution Approach 2:
The sensor continuously monitors the lifting column support status and provides real-time feedback to the controller, which automatically adjusts or stops the milling drum operation when insufficient support is detected, creating a closed-loop control system
2Reliability
If a sensor system is added to monitor lifting column support, then kick-back events can be prevented, but the device complexity increases
Solution Approach 1:
The sensor system is integrated into the existing lifting column structure, using the column's own movement and load characteristics to trigger the safety function, eliminating the need for separate complex monitoring mechanisms
Solution Approach 2:
The system replaces complex mechanical kick-back detection mechanisms with an electronic sensor-based detection and control system, using electrical signals instead of mechanical linkages for monitoring and response
Data Source
AI summary
A milling machine includes a primary drum drive assembly that is adapted to rotate a milling drum, and a ground-engaging drive assembly that is adapted to drive the milling machine along a roadway. A lifting column includes a linear actuator which can be operated to raise and lower the frame of the machine with respect to the roadway. A sensor that is mounted to the lifting column is adapted to determine if the lifting column is not supporting at least a predetermined portion of the weight of the milling machine. A controller is operatively attached to the primary drum drive assembly and to the sensor. The controller is adapted to receive from the sensor a signal indicating that the lifting column is not supporting the predetermined portion of the weight of the milling machine, and upon receipt of such signal, to stop the rotation of the milling drum.