Shovel Bucket Tilt Control for Slope Excavation
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Solution Overview
Problem
Existing excavation control systems for shovels fail to maintain the bucket's cutting edge parallel to a slope surface during excavation, leading to an uneven excavated surface when working on inclined surfaces.
Innovation Solution
A shovel equipped with a tilt mechanism, tilt angle sensor, and tilt angle controller that automatically adjusts the bucket's tilt angle to ensure the bucket line remains parallel to the target excavation surface, even when operating on a slope.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the bucket is moved along the slope surface while revolving the revolving upper body, then the productivity of excavation is improved, but the bucket line inclines to the slope surface causing manufacturing precision deterioration
Solution Approach 1:
The invention introduces a tilt mechanism that dynamically adjusts the bucket's orientation angle relative to the arm. This allows the bucket to maintain a constant angle relative to the slope surface even when the arm and boom orientations change during excavation movements, resolving the contradiction between productivity and precision
Solution Approach 2:
The system employs sensors to detect the actual orientation of the bucket line relative to the slope surface and feeds this information back to the control unit. The control unit then automatically adjusts the tilt mechanism to correct any deviation, ensuring the bucket line remains parallel to the target surface throughout the excavation process
2Device complexity
If a single rotational axis parallel to the road surface is used as the bucket rotational axis, then the device complexity is reduced, but the adaptability to slope surfaces deteriorates
Solution Approach 1:
The invention adds a tilt mechanism that enables the bucket to dynamically adjust its angle relative to the arm. This dynamic adjustment capability allows the bucket to adapt to slope surfaces while maintaining a relatively simple mechanical structure, resolving the contradiction between device complexity and adaptability
Solution Approach 2:
The bucket orientation control is segmented into two independent rotational movements: the primary rotation about the arm axis and the secondary tilt rotation about the tilt axis. This segmentation allows each mechanism to be simple while their combination provides complex adaptability to various slope conditions
Data Source
AI summary
A shovel includes: an arm rotatably attached to a boom rotatably attached to a revolving body; a bucket rotatably attached to the arm; a tilt mechanism configured to support the bucket that can be tilted to the arm; a bucket tilt angle sensor configured to detect a tilt angle of the bucket; and a tilt angle controller configured to control adjusting the tilt angle. The tilt angle controller adjusts the tilt angle by automatic control of the tilt mechanism so that a bucket line of the bucket becomes parallel to a target excavation surface. The automatic control of the tilt mechanism is enabled after moving the shovel and/or during rotating the shovel.