Split Cabin Front Window With Detachable Lower Panel
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Solution Overview
Problem
In working machines, the conventional design of a cabin's front window, where the lower half is configured to open towards the ceiling, results in a decrease in head clearance due to the need for space to accommodate the open window portions and their associated members.
Innovation Solution
A cabin design where the front window is vertically divided into an upper and lower portion, with the lower window portion being detachably coupled to the window frame and featuring a lock mechanism to secure it in place, allowing for full opening of the window without compromising head clearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lower window portion is configured to open toward the ceiling portion along the rail portion similarly to the upper window portion, then the front window can be fully opened, but the head clearance in the cabin is decreased due to the space required at the ceiling portion for accommodating both window portions and their members
Solution Approach 1:
The front window is divided into two independent parts: the upper window portion that opens along the rail portion, and the lower window portion that is detachably coupled to the window frame. This segmentation allows each portion to have its own opening mechanism, with the lower portion being removable rather than sliding upward, thus avoiding the need for ceiling space and preserving head clearance while maintaining full window openability
Solution Approach 2:
Instead of making the lower window portion open upward along the rail like the upper portion (conventional approach), the invention inverts the approach by making the lower portion detachably coupled to the window frame, allowing it to be removed completely. This reverse thinking eliminates the conflict between window openability and head clearance
2Length of stationary object
If the lower window portion is made detachably coupled to the window frame with a lock mechanism, then head clearance is maintained, but the device complexity increases due to additional locking and detaching mechanisms
Solution Approach 1:
The window system is segmented into permanently fixed upper portion and detachable lower portion, each with simplified mechanisms. The upper portion uses a simple rail sliding mechanism, while the lower portion uses a straightforward detachable coupling with lock, avoiding the complexity of making the entire window system fully detachable or adding complex ceiling accommodation mechanisms
Data Source
AI summary
A cabin of a working machine includes a protective frame vertically provided around an operator's seat; a roof at an upper portion of the protective frame; and a front window at a front portion of the protective frame. The front window is vertically divided into an upper window portion coupled to a window frame at the front portion of the protective frame so as to be movable toward a lower surface of the roof, and a lower window portion detachably coupled to the window frame. The window frame includes a lower window stay to engage with a lower edge of the lower window portion, and a lock receiver to hold a side edge of the lower window portion in a closed position. The lower window portion includes a lock to be fitted to the lock receiver when the side edge of the lower window portion overlaps the window frame.