Agricultural Harvester Take-up Drum and Hold-down Collision Prevention
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Solution Overview
Problem
The existing agricultural harvesting machines face the challenge of avoiding collisions between the hold-down and other components of the machine when the take-up drum is raised, particularly due to the risk of human error by inexperienced or tired operators.
Innovation Solution
An arrangement with two actuators and a control system that automatically adjusts the position of the take-up drum and the hold-down, ensuring the hold-down is lowered before the take-up drum is raised, preventing collisions with machine components and external obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the operator manually lowers the hold-down before raising the take-up drum, then collisions can be avoided, but the operation is prone to human error and requires constant operator attention
Solution Approach 1:
The control arrangement automatically monitors the take-up drum position and actuates the hold-down lowering without operator intervention. The system serves itself by detecting when the take-up drum is raised and autonomously executing the hold-down lowering sequence, eliminating the need for constant operator attention and manual operation.
Solution Approach 2:
The control arrangement receives input signals from sensors that detect the position of the take-up drum. Based on this feedback information, the control arrangement automatically determines when to lower the hold-down, creating a closed-loop control system that responds to actual machine state rather than relying on operator observation and judgment.
2Adaptability or versatility
If the hold-down is allowed to remain in a raised position for road operation, then the take-up drum can be raised, but the hold-down may collide with machine components or external obstacles
Solution Approach 1:
The control arrangement executes the hold-down lowering action in advance before the take-up drum reaches its fully raised position or before the machine transitions to road operation. This preliminary action ensures that the hold-down is already in the safe lowered position when road operation begins, preventing any potential collision with overhead obstacles or machine components.
Solution Approach 2:
The system applies a counter-action by automatically lowering the hold-down whenever the take-up drum is raised, regardless of whether this seems immediately necessary. This preliminary anti-action prevents the potential harmful effect of collision before it can occur, even in situations where the operator might not immediately perceive the danger.
3Reliability
If the operator must constantly monitor and manually adjust the hold-down position, then collision avoidance is possible, but operator fatigue and inexperience lead to errors
Solution Approach 1:
The patent replaces the manual mechanical operation of the hold-down with an automated control system. Instead of the operator physically manipulating controls or visually monitoring and responding, an electronic control arrangement with sensors and actuators performs the function, substituting mechanical/operator-based control with an automated electromechanical system.
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
This solution effectively prevents collisions between the hold-down and the harvesting machine components and external obstacles, reducing the risk of damage and ensuring safe operation by automating the positioning process.
Implementation Method 1
A first actuator (50) is arranged for the movement of the take-up drum (20) relative to the harvesting machine (10) between an operating position and a non-operating position
Implementation Method 2
A second actuator (52) is arranged for the height adjustment of the hold-down (40) relative to the take-up drum (20)
Implementation Method 3
The control arrangement (54, 74) automatically controls the second actuator (52) in the sense of a downward movement of the hold-down (40) by movement of the first actuator (50) in that it brings about the movement of the take-up drum (20) into the non-operating position
Data Source
AI summary
An arrangement is provided for the adjustment of the position of a take-up drum and a hold-down of an agricultural harvesting machine. A first actuator is arranged for the movement of the take-up drum relative to the harvesting machine between an operating position and a non-operating position, a second actuator arranged for the adjustment in height of the hold-down relative to the take-up drum and a control arrangement connected with the actuators. The control arrangement is designed to control the second actuator in the sense of a downward movement of the hold-down when it controls the first actuator to bring the take-up drum into the non-operating position.