Loading Machine Bucket Positioning for Excavation Start Posture
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Solution Overview
Problem
The existing control systems for loading machines do not automatically move the bucket to an appropriate position for starting excavation after an excavation operation, often resulting in an inappropriate position for subsequent excavation.
Innovation Solution
A control device for loading machines that includes a start angle determination unit and a movement control unit, which automatically adjusts the swing body and work equipment to reach a preset target posture different from the initial excavation posture, ensuring the bucket is positioned correctly for starting excavation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the bucket is returned to the position at the start of loading after excavation, then the loading cycle is completed, but the position is inappropriate for starting subsequent excavation operations
Solution Approach 1:
The control device performs preliminary action by automatically moving the bucket to a predetermined appropriate position for starting excavation before the operator needs to begin the next excavation cycle. This preliminary positioning eliminates the need for manual adjustment and ensures the bucket is always in the correct starting position, resolving the contradiction between completing the loading cycle and maintaining appropriate excavation start position.
2Productivity
If automatic control moves the bucket to the position at the start of loading, then the loading operation is efficient, but the bucket posture is not suitable for subsequent excavation
Solution Approach 1:
The system performs preliminary action by automatically adjusting the bucket posture to a predetermined appropriate position for starting excavation after loading completion. This ensures that when the operator begins the next excavation cycle, the bucket is already in the correct posture, maintaining both loading efficiency and excavation reliability.
3Productivity
If the bucket remains in the loading position after dumping, then the loading operation is complete, but interference with the undercarriage may occur in subsequent operations
Solution Approach 1:
The control device performs preliminary action by automatically moving the bucket to a predetermined position that is clear of the undercarriage after loading completion. This preliminary movement prevents potential interference with the undercarriage during subsequent excavation operations, resolving the contradiction between completing loading and avoiding harmful interference.
Data Source
AI summary
A start angle determination unit determines a start angle which is an angle of a swing body at the start of loading of a loading machine. The movement control unit outputs an operation signal for driving the swing body until the angle of the swing body reaches the start angle after a bucket has reached a loading point above a loading target, and outputs an operation signal for driving the work equipment until a posture of the bucket with respect to the swing body reaches a preset target posture different from a posture of the bucket at the start of loading.