Operator Seat Control Layout for Safe Pattern Switching
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Solution Overview
Problem
The existing working machines allow the pattern switching member to be operated even when the operating body is in the first position, which prevents the operator from getting on or off the seat, leading to undesired operation.
Innovation Solution
The pattern switching member is designed to be covered by the operating body when in the first position, making it impossible or difficult to operate, and is exposed for operation when in the second position, ensuring the operating body is in the correct configuration for seat access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pattern switching member is always accessible, then the operator can easily switch manipulation patterns, but the pattern switching member may be operated unintentionally when the operating body is in the first position
Solution Approach 1:
The pattern switching member is integrated with the operating body and moves dynamically between positions. When the operating body is in the first position, the pattern switching member is covered and inaccessible. When the operating body moves to the second position, the pattern switching member becomes exposed and operable. This dynamic positioning ensures that the pattern switching member can only be operated when the operating body is in the correct position, preventing unintended operations while maintaining ease of access when needed.
2Reliability
If the pattern switching member is covered when the operating body is in the first position, then unintended operation is prevented, but the operator cannot switch manipulation patterns during operation
Solution Approach 1:
The system requires the operator to switch manipulation patterns only when the operating body is in the second position, before starting operation. The pattern switching member is made accessible only in this state, allowing the operator to select the desired manipulation pattern in advance. Once operation begins and the operating body moves to the first position, the pattern switching member becomes inaccessible, ensuring that no unintended switching occurs during operation. This preliminary action approach allows full adaptability when needed while ensuring reliability during operation.
Data Source
AI summary
A working machine includes: an operating body switchable between a first position to prevent an operator from getting on/off an operator's seat and a second position to allow the same; a plurality of hydraulic actuators whose operation is enabled when the operating body is in the first position and disabled when in the second position; a manipulation member to be manipulated to operate the hydraulic actuators; and a pattern switching member to be operated switchingly to select one from among a plurality of manipulation patterns of the manipulation member to operate the hydraulic actuators. When the operating body is in the first position, at least a part of the pattern switching member is covered by the operating body so that the pattern switching member is impossible or difficult to be operated. When the operating body is in the second position, the pattern switching member is exposed to be operable.