Excavator Cab Seating for Improved Visibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The design of excavator cabs faces challenges in providing adequate visibility and training environments due to space constraints, where the placement of operator controls and trainer positions often obstructs visibility and safety, and accommodating two operator seats and a passageway within the maximum practical width of the front window is difficult.
Innovation Solution
The excavator cab design includes a configuration with a front observation window, side windows, and seating arrangements for the operator, trainer, and trainee, allowing them to have a clear line of sight through the front observation window, with the trainee seat positioned above the operator seat and the trainer seat behind, ensuring similar visibility and access to controls and emergency stop buttons, while maintaining a passageway and emergency egress points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a single large front window is used to provide visibility, then visibility of the working part and adjacent equipment is improved, but the width of the cab is constrained by the maximum practical width of the front window
Solution Approach 1:
The patent divides the front window into multiple separate windows (first front window and second front window) rather than using a single large window. This segmentation allows the cab to maintain adequate visibility through multiple smaller windows while fitting within the maximum practical width constraint of the front window assembly.
2Adaptability or versatility
If two operator seats are added to accommodate trainer and trainee, then training capability is improved, but it becomes difficult to fit two seats, operator controls, and passageway within the maximum practical width of the front window
Solution Approach 1:
The patent utilizes the vertical dimension by positioning the trainee seat above the operator seat. This vertical stacking arrangement allows accommodation of multiple seats without increasing the horizontal width of the cab, thereby maintaining compliance with the maximum practical width constraint while enabling training functionality.
3Ease of operation
If trainer stands behind operator to provide instructions, then training interaction is improved, but trainer blocks passageways and visibility of operator
Solution Approach 1:
The patent introduces a dedicated trainer seat positioned adjacent to the operator seat with direct access to the control console. This intermediary seating position allows the trainer to observe and instruct without blocking the operator's visibility or access to controls, while still maintaining close proximity for effective training interaction.
4Ease of operation
If all machine controls are placed to one side of operator, then control accessibility is improved, but visibility on that side is eliminated
Solution Approach 1:
The patent designs the control console to be accessible from multiple seats (operator seat, trainer seat, and trainee seat) rather than being restricted to a single side. This multi-functional control arrangement allows different occupants to access controls from their respective positions, maintaining both accessibility and visibility for all users.
Data Source
AI summary
An excavator cab is configured to have an improved field of view for three passengers. Seating is provided for an operator, a trainer, and an trainee. Persons seated in those three seats have substantially similar lines of sight. The excavator cab is arranged such that the operator seat and the trainer seat face a front observation window. The trainee seat is mounted behind the operator seat and is retractable. The points of egress and aisle are wide enough to accommodate a stretcher or a litter in case of an emergency.