Automatic Boom Telescopic Motion Apparatus for Working Machines
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Solution Overview
Problem
Operators of working machines with telescopic booms experience strain and fatigue due to the need to maintain the boom telescopic motion lever in a tilted position for extended periods during extensive telescopic motion, such as extending the boom from minimum to maximum length.
Innovation Solution
An automatic boom telescopic motion apparatus that includes a driving source, output detection, a boom telescopic motion input part, and an on/off operation part, allowing the telescopic motion to continue automatically when the output detection part detects a predetermined driving force and the boom telescopic motion input part is activated to increase speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the operator keeps the boom telescopic motion lever tilted to increase the telescopic motion speed, then the telescopic motion can be completed faster, but the operator's arms or hands experience strain and fatigue
Solution Approach 1:
The system automatically maintains the telescopic motion speed without requiring continuous operator input. The control unit detects the lever position and automatically adjusts the driving force output to maintain the specified speed, allowing the system to serve itself rather than requiring constant operator intervention.
Solution Approach 2:
The manual mechanical control system is replaced with an automated electronic control system. The control unit replaces the need for continuous manual lever adjustment by automatically regulating the driving force based on detected lever position and predetermined speed parameters.
2Productivity
If the operator operates the accelerator pedal and boom telescopic motion lever simultaneously, then the telescopic motion can be controlled, but the operator must maintain lever tilt for extended periods causing fatigue
Solution Approach 1:
The control system automatically manages the telescopic motion duration and speed maintenance without requiring sustained operator action. Once the operator sets the initial lever position, the system self-regulates the motion throughout the entire duration, eliminating the need for continuous manual input.
Solution Approach 2:
The operator performs a preliminary action by setting the lever position to determine the desired speed, and then the system automatically executes the telescopic motion for the entire duration. This preliminary setting replaces the need for continuous manual adjustment throughout the operation.
3Loss of time
If the telescopic cylinder is driven at high speed from minimum to maximum length, then the telescopic motion is completed faster, but it requires sustained high output from the driving source
Solution Approach 1:
The driving force output is dynamically adjusted based on the actual telescopic motion speed and load conditions. The control unit continuously regulates the driving force to maintain predetermined speed while optimizing energy usage, rather than applying constant maximum force throughout the motion.
Solution Approach 2:
The control unit receives feedback from the telescopic motion actual value detection and automatically adjusts the driving force output accordingly. This closed-loop control ensures the system maintains the desired speed while minimizing energy consumption by adapting to actual operating conditions.
Data Source
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AI summary
Provided is an automatic boom extension/contraction device for a work machine in which it is possible to reduce the burden, such as arm or hand fatigue, on a worker inputting an operation for extending or contracting a boom when the worker actuates the boom so as to extend or contact. When, in a state in which an automatic extension/contraction switch (53) is ON, an engine rotation speed equal to or greater than a first predetermined rotation speed (R1) is detected by an engine rotation speed sensor (51) and an operation in which the speed of extension/contraction actuation of a boom (22) is equal to or greater than a predetermined speed is inputted through a boom extension/contraction lever (52), an automatic extension/contraction actuation is performed in which the extension/contraction actuation of the boom (22) is maintained in a state in which an operation of extending/contacting the boom (22) is not inputted through the boom extension/contraction lever (52).