Hydraulic Boom Deceleration Control for Backhoe Efficiency
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Solution Overview
Problem
The existing backhoe technology experiences reduced working efficiency due to slow movement of the boom when transitioning to the raised end stop position, caused by gradual acceleration and deceleration processes, leading to prolonged time and inefficient operations.
Innovation Solution
A work machine equipped with a hydraulic cylinder, detection device, operation signal detection unit, control valve, calculation unit, and setting unit that determine the deceleration section and ratio based on the working unit's posture, allowing for optimized movement from a stop position to the end position with adjusted oil supply, thereby enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the boom is slowly accelerated until the velocity reaches a velocity based on the deceleration characteristic, then the boom can be automatically stopped at the raised end stop position, but the movement of the boom becomes excessively slow and it takes time for the boom to move to the raised end stop position
Solution Approach 1:
The patent applies dynamics by making the deceleration ratio variable rather than fixed. The control device changes the deceleration ratio based on the detected boom velocity and position, allowing the system to adapt its deceleration characteristics dynamically. This enables faster overall movement while maintaining accurate automatic stopping at the end position.
Solution Approach 2:
The patent changes the parameter of deceleration ratio based on operating conditions. By detecting boom velocity and position, the control device adjusts the deceleration ratio to be larger when velocity is high and smaller when velocity is low, optimizing both speed and stopping accuracy throughout the movement range.
2Reliability
If a fixed deceleration characteristic is used for cushion control, then the boom can be stopped at the raised end stop position, but the movement becomes excessively slow when the boom is activated from a stopped state
Solution Approach 1:
The system dynamically adjusts the deceleration ratio based on real-time boom velocity detection. When the boom is activated from a stopped state, the control device detects the velocity increase and相应地 adjusts the deceleration ratio, allowing faster initial movement while ensuring accurate stopping at the end position.
Solution Approach 2:
The patent implements feedback control by continuously detecting boom velocity and position, then using this information to adjust the deceleration ratio. This closed-loop control enables the system to optimize movement speed while maintaining precise positioning accuracy at the raised end stop position.
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
The solution suppresses the reduction in working efficiency by optimizing the movement of the boom, reducing shock and unnecessary slow movements, and ensuring faster and more efficient operation.
Implementation Method 1
a hydraulic cylinder that drives a working unit in a movable range; a control valve capable of adjusting an amount of a working oil supplied to the hydraulic cylinder
Data Source
AI summary
A control method for a work machine, includes: detecting a posture of a working unit driven by a hydraulic cylinder in a movable range; determining whether the working unit at a stop position of the movable range has started moving based on an operation of the working unit; setting a deceleration section including an end position of the movable range and a deceleration ratio of the working unit in the deceleration section, based on the posture of the working unit in a stopped state at the stop position, and a threshold determined in advance; and outputting a command signal to a control valve, which is capable of adjusting an amount of a working oil supplied to the hydraulic cylinder, such that the working unit moves from the stop position to the end position based on the deceleration section and the deceleration ratio.