Cab Display Placement for Overhead Front Entry Doors
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Solution Overview
Problem
Power machines with front door entry face interference issues between the door and lift arms, and existing solutions do not adequately address the obstruction of operator controls and displays when the door is open or closed.
Innovation Solution
A cab design with a movable door that opens overhead, a four-bar linkage system to support the door's movement, and a display mounted on a pillar or the door to maintain visibility and accessibility for the operator, allowing the display to be oriented for optimal viewing in both closed and open positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the door is positioned overhead of the operator seat when open, then the door does not interfere with lift arm travel path, but the door linkage may obstruct operator view or control
Solution Approach 1:
The display is specifically positioned on the side pillar at a location that provides optimal viewing angles for the operator. This localized positioning ensures that the display remains visible and accessible regardless of the door's position, while the door linkage is configured to move along a path that minimizes obstruction to the operator's view and control of the machine.
2Ease of operation
If the display is mounted on the side pillar, then the display remains accessible with door in open, closed, or transition positions, but the mounting complexity increases
Solution Approach 1:
The side pillar mounting location serves multiple functions: it provides structural support for the display, positions the display optimally for operator viewing, and ensures the display remains accessible regardless of door position. This multi-functional use of the side pillar mounting location reduces the need for additional complex mounting mechanisms.
Data Source
AI summary
Disclosed are front entry cabs, and power machines with front entry cabs, having a door that is moveable between opened and closed positions and a display oriented in the cab to provide information to the operator both while the door is in the opened and closed positions. In the opened position, the door is positioned within an operator compartment of the cab above the operator seat and below a top of the cab. The display is positioned to not interfere with the door, door linkages, or operator joystick control.