Auxiliary Cylinder Fixing Control for Working Machine Boom
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Solution Overview
Problem
Existing working machines with auxiliary cylinders attached to derricking members face issues with undesirable swing motions due to manual operation errors in fixing and releasing the cylinder, leading to potential collisions with the boom or other components during assembly and disassembly.
Innovation Solution
An auxiliary cylinder apparatus equipped with a fixing device, an auxiliary-cylinder angle detector, and an expansion controller that only fixes the auxiliary cylinder to the derricking member when its expansion length is within a predetermined range and allows expansion and contraction motions when in a vertical posture, preventing unwanted rotational movements by prohibiting motions that deviate from this range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operation is used to fix and release the cylinder fixing pin, then the operator can control the fixing state, but there is a possibility of erroneous removal leading to undesirable swing motion
Solution Approach 1:
The system automatically monitors the mast tilt angle and controls the fixing pin insertion and removal without operator intervention. The angle detector detects mast tilt, and the controller automatically inserts the fixing pin when tilt exceeds the threshold and removes it when tilt returns to normal, eliminating human error while maintaining operational control.
Solution Approach 2:
The angle detector continuously monitors the mast tilt angle and provides feedback to the controller. Based on this feedback, the controller automatically activates or deactivates the fixing pin mechanism, creating a closed-loop control system that responds dynamically to mast position changes and prevents erroneous fixing state changes.
2Stability of the object's composition
If the auxiliary cylinder is fixed to the derricking member during tilt, then swing motion is prevented, but the fixing mechanism may not accommodate dynamic posture changes
Solution Approach 1:
The fixing mechanism transitions from a static fixed state to a dynamic controlled state. The fixing pin is automatically inserted or removed based on real-time mast tilt angle detection, allowing the system to adapt its fixing state dynamically. This enables stable fixing during tilt while maintaining flexibility for normal operational postures.
Solution Approach 2:
The system changes the fixing state parameter (fixed or released) based on the mast tilt angle parameter. When the tilt angle exceeds a predetermined threshold, the fixing state changes from released to fixed, and vice versa. This parameter-based control allows the mechanism to adapt to different operational conditions automatically.
Data Source
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AI summary
Provided is an apparatus capable of preventing an auxiliary cylinder (31) attached to a derricking member (15) of a working machine from undesirable rotational movement. The apparatus includes an auxiliary cylinder (31) capable of making expansion and contraction motions, an auxiliary-cylinder angle detector, a fixing device, and an expansion controller. The fixing device fixes the auxiliary cylinder (31) to the derricking member (15) when the expansion length of the auxiliary cylinder (31) is in the fixing allowing range, and releases the fixing of the auxiliary cylinder (31) at other times. The expansion controller judges the posture of the auxiliary cylinder (31) based on the auxiliary-cylinder angle detected by the auxiliary-cylinder angle detector, allows the expansion and contraction motions when the auxiliary cylinder (31) is in the vertical posture, and prohibits the auxiliary expansion and contraction motions when the auxiliary cylinder (31) is in a posture other than the vertical posture and the auxiliary cylinder (31) is fixed to the derricking member (15).