Tractor-Engine Maintenance Ladder with Stability Beams
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Solution Overview
Problem
Mechanics face potential injury and strain when using traditional stepladders to access the high engine compartments of tractor-trailer trucks due to the need to lean over, indicating a need for a more stable and accessible ladder solution.
Innovation Solution
A ladder with angled rails, stability beams, and an integrated platform that extends rearward from the main rails, providing a planar surface for easier access to the engine while maintaining stability through adjustable feet and cross beams, and a platform that allows mechanics to stand comfortably without tipping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional stepladder is used to access the engine, then the ladder is portable and can be easily moved, but the mechanic must lean over the engine leading to potential injury and strain
Solution Approach 1:
The ladder transitions from a vertical stepladder configuration to a horizontal platform ladder configuration. The platform extends horizontally from the ladder structure, allowing the mechanic to position themselves beside the engine rather than leaning over it from above. This dimensional change in the working surface orientation eliminates the need for harmful leaning postures while maintaining accessibility to engine components.
2Ease of operation
If the ladder structure is extended to provide a platform for comfortable standing, then access to the engine is improved, but the stability of the ladder may be compromised
Solution Approach 1:
The ladder structure is designed with the platform and support legs configured in advance to achieve optimal stability before use. The horizontal platform is pre-positioned at the appropriate height and distance from the ladder rails, and the support legs are pre-configured to extend to the ground at stable angles. This preliminary configuration ensures that when the mechanic steps onto the platform, the ladder is already in a stable, balanced state that prevents tipping while providing comfortable standing space.
3Ease of operation
If a platform is added to the ladder for easier access, then the mechanic can stand comfortably without leaning, but the device complexity increases
Solution Approach 1:
The platform, support legs, and ladder structure are merged into a single integrated unit. The platform is structurally connected to the ladder rails, and the support legs are integrated with the platform framework, creating a unified structure rather than separate components. This merging reduces the number of discrete parts, simplifies assembly and disassembly procedures, and maintains portability while providing the stability and comfort of a platform design.
Data Source
AI summary
Disclosed herein is a ladder adapted to service the engine of a tractor-trailer truck. The ladder comprises a set of rails having rungs extending between them. A set of rear rails is coupled to the set of rails. A pair of stability beams, terminating in ground contacting feet, extends rearward from the front rail and rear rails on each side of the ladder. A platform, extending rearward from between the set of rails, provides a planar surface allowing a mechanic access to the engine.