Excavator Swing Control with Attachment-Aware Rotation Limits
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Solution Overview
Problem
Existing construction equipment lacks effective control over the rotation of the upper rotating body, leading to potential collisions and the inability to accurately manage repetitive rotations, especially when attachments are exchanged, due to the need for separate sensors and the operator's inability to adjust for shape and structure differences.
Innovation Solution
A construction equipment system that includes a swing control unit with a display unit for inputting swing control data, allowing operators to set swing pause and limit points, an obstacle recognition sensor, and an attachment recognition sensor to adjust rotation control based on detected obstacles and attachment changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate sensor is used to measure the angle and swing angle of the work machine, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The patent combines the angle measurement function and swing angle measurement function into a single sensor system. The sensor measures both the angle of the work machine relative to the upper rotating body and the swing angle of the upper rotating body itself, eliminating the need for separate sensors and reducing overall system complexity while maintaining measurement precision.
2Ease of operation
If the upper rotating body is allowed to rotate freely, then the ease of operation is improved, but the reliability decreases due to potential over-rotation and collisions
Solution Approach 1:
The patent implements a feedback control system where the sensor continuously monitors the swing angle of the upper rotating body, and the control unit receives this information to determine whether to allow rotation. When the swing angle exceeds a predetermined threshold, the control unit restricts further rotation in that direction, preventing over-rotation and potential collisions while allowing free rotation within safe limits.
3Ease of operation
If the operator manually calculates the area in which the construction equipment might collide, then the ease of operation is improved, but the measurement precision and reliability of collision prevention decrease
Solution Approach 1:
The patent enables the construction equipment to automatically perform collision risk assessment and rotation control without requiring manual calculation by the operator. The sensor automatically measures the swing angle, the control unit compares it with predetermined thresholds, and automatically restricts rotation when necessary, replacing manual calculation with automated precision measurement and control.
4Stability of the object's composition
If the construction equipment uses a fixed rotation radius, then the stability of the object's composition is improved, but the adaptability decreases when exchanging attachments with different shapes
Solution Approach 1:
The patent implements a dynamic rotation control system where the rotation radius and swing angle thresholds are not fixed but can be adjusted based on the attached work machine. When attachments with different shapes are exchanged, the system can modify the predetermined swing angle thresholds and rotation limits to match the specific geometry and operational requirements of each attachment, maintaining both stability during operation and adaptability across different attachments.
Data Source
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AI summary
The present invention relates to a construction equipment comprising a lower traveling body; an upper rotating body rotatably supported on the lower traveling body; a work machine supported on the upper rotating body, comprising a boom, an arm, and an attachment operated by respective cylinders; a rotating device comprising a swing motor for rotating the upper rotating body and a swing reduction gear for reducing rotation of the swing motor; a controller for outputting a control signal to the rotating device; and a swing control unit for receiving an input for swing control of the upper rotating body.