Construction Equipment Boom Float Control via Solenoid Valves
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Solution Overview
Problem
Existing construction equipment requires skilled operation to simultaneously control boom and arm movements for tasks like ground leveling and material collection, leading to worker fatigue due to the need for precise and repetitive manual control.
Innovation Solution
The equipment incorporates a boom operating unit with solenoids to control the boom cylinder, an arm operating unit, and a control unit that outputs flow path connection signals to manage the boom cylinder, allowing for float mode operations that enable arm-only lever manipulation, reducing the need for skilled operation and fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a float circuit is introduced to enable self-weight boom descent, then ease of operation is improved, but device complexity increases due to additional hydraulic circuit components
Solution Approach 1:
The patent combines the float mode control with the existing boom cylinder hydraulic circuit by integrating solenoid valves into the current system architecture. The control unit merges float mode signals with existing boom control signals, allowing the boom to float during arm operations without requiring completely separate control circuits. This integration approach enables ease of operation improvement while minimizing additional complexity.
Solution Approach 2:
The solenoid valves introduced in the patent serve multiple functions: they control both the float mode operation and the normal boom elevation/descent operations. The control unit universally manages both float mode activation and standard boom control, allowing a single hydraulic circuit system to handle multiple operational modes without requiring entirely separate control systems.
2Productivity
If automatic boom control is implemented through control unit, then productivity is improved, but device complexity increases due to additional control components
Solution Approach 1:
The control unit automatically determines when float mode should be activated based on arm lever position signals, eliminating the need for separate operator intervention. The system self-regulates boom behavior during arm operations by automatically engaging float mode when appropriate, improving productivity through automation while keeping the control architecture relatively simple by using existing sensor inputs.
Solution Approach 2:
The control unit receives feedback signals from arm lever position sensors and automatically adjusts boom control accordingly. When the arm lever is operated within specific angular ranges, the control unit detects this input and automatically activates the float mode by controlling the solenoid valves, creating a closed-loop system that improves productivity through automatic response to operator input.
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
This solution allows for accurate and efficient simultaneous operation of boom and arm without additional switches, reducing worker fatigue and enabling precise control of excavation force through simplified arm lever operations.
Implementation Method 1
a boom cylinder, a boom head return solenoid and a boom rod return solenoid, the boom head and rod return solenoids configured to control an extension of the boom cylinder
Implementation Method 2
control an extension of the boom cylinder to control an ascending and descending of the boom
Implementation Method 3
when a ground reaction force by a bucket in the arm-in mode is generated, the boom is regulated so that the bucket moves along a corresponding ground
Data Source
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AI summary
Construction equipment, according to the present invention, comprises: a boom operating unit including a boom, a boom cylinder, and a boom head and rod return solenoids for controlling the extension of the boom by controlling the ascending and descending of the boom cylinder; an arm operating unit comprising an arm and an arm cylinder so as to move the arm by controlling the extension of the arm cylinder; and a control unit for generating a flow path connection signal in at least a part of the boom head and rod return solenoids upon operation of an arm lever in a boom float mode so as to control the boom cylinder. An operation of simultaneously driving the boom and the arm of the construction equipment can be performed even by only an arm lever operation of an operator, and thus does not require skilled work and can lessen fatigue from repetitive work.