Cabin Front Window Structure for Full Opening and Head Clearance
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Solution Overview
Problem
In working machines, the upper and lower window portions of the cabin's front window are designed to open, but this configuration reduces head clearance due to the need for space to accommodate the open windows and their components.
Innovation Solution
The cabin design includes a front window that is vertically divided into an upper and lower portion, where the lower window portion is detachably coupled to the window frame and includes a lock mechanism to secure it in place, allowing for full opening of the front window without reducing 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 openable, but the head clearance in the cabin is decreased
Solution Approach 1:
The front window is divided into an upper window portion and a lower window portion that can be independently opened. The lower window portion is detachably coupled to the window frame, allowing it to be separated into a storage space below the operator's seat rather than requiring ceiling accommodation space.
Solution Approach 2:
Instead of opening the lower window portion vertically upward along the ceiling (consuming head clearance space), the window portion is designed to be detachably coupled and stored horizontally in a storage space below the operator's seat, changing the storage dimension from vertical to horizontal.
2Ease of operation
If the lower window portion is made detachably coupled to the window frame with lock mechanism, then the window can be fully removed for maximum opening, but the device complexity increases
Solution Approach 1:
The window system is segmented into a permanently coupled upper window portion and a detachably coupled lower window portion. The detachable coupling includes simple locking mechanisms (lock receivers and locks) that enable easy attachment and detachment without complex mechanisms.
Solution Approach 2:
The lower window portion is extracted as a separate, detachable component from the main window frame structure. This allows the lower window to be completely removed and stored separately, enabling maximum opening of the front window while using a relatively simple detachable coupling system.
Data Source
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AI summary
To provide a cabin (5) mounted on a working machine (1), in which it is possible to make a cabin front window portion to be fully openable while preventing or reducing a decrease in head clearance in the cabin. A cabin mounted on a working machine includes a protective frame (30) vertically provided around an operator's seat (6) included in the working machine; a roof (35) provided at an upper portion of the protective frame; and a front window (42) provided at a front portion of the protective frame. The front window is vertically divided into an upper window portion (51), which is coupled to a window frame (31) 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 (52) detachably coupled to the window frame. The window frame includes a lower window stay (39A) to engage with and support a lower edge (52b) of the lower window portion, and a lock receiver (39B) to hold a side edge (52c) of the lower window portion in a closed position. The lower window portion includes at least one lock (55) to be fitted to the lock receiver when the side edge of the lower window portion is overlapped with the window frame.