Working Machine Control Device for Operation State Switching
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Solution Overview
Problem
Existing working machines lack an efficient mechanism to switch between operational states, particularly between an operation allowable state and an operation restriction state, which is crucial for safe and controlled operation, especially in scenarios requiring restricted functionality.
Innovation Solution
A working machine is equipped with an operation control device that includes a control portion and an operation switching device, allowing the machine to be switched between operation allowable and operation restriction states through a predetermined input operation, such as a pressing operation on a switch, which controls the supply of operation fluid to hydraulic actuators, thereby enabling or restricting the machine's operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the working machine allows full operation in the operation allowable state, then productivity is improved, but safety and operational control are worsened when restrictions are needed
Solution Approach 1:
The control device dynamically switches between operation allowable state and operation restriction state based on input operations. The hydraulic system adapts its control characteristics in real-time, allowing full operational capacity when needed for productivity while imposing restrictions when safety requires, thus resolving the contradiction between productivity and safety through dynamic state adjustment
2Reliability
If the working machine implements operation restriction state, then safety and operational control are improved, but device complexity is worsened
Solution Approach 1:
The control device serves multiple functions: it manages normal hydraulic operations, implements operation restrictions, and handles state transitions between allowable and restriction modes. By making the control device universal and multi-functional, the patent avoids adding separate dedicated restriction mechanisms, thereby improving safety without proportionally increasing device complexity
3Adaptability or versatility
If the working machine switches between operation states through input operation, then operational flexibility is improved, but ease of operation is worsened
Solution Approach 1:
The control device monitors input operations from the operation device and provides feedback control by automatically adjusting hydraulic supply based on detected operation states. This feedback mechanism enables flexible state switching while reducing the operator's burden, as the system automatically manages the complexity of state transitions rather than requiring manual intervention, thus resolving the contradiction between flexibility and ease of operation
Data Source
AI summary
A working machine includes an operation device to conduct operations of the working machine, a control device to control the working machine between an operation allowable state and an operation restriction state, the operation allowable state allowing the working machine to be operated, the operation restriction state restricting the operations conducted by the operation device in comparison with the operation allowable state. The working machine includes a display device having a display portion and an input operation portion. The control device performs control under the operation restriction state when a predetermined input operation is conducted through the input operation portion.