Rotating Vehicle Handrail Assembly for Clear Standing Space
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Solution Overview
Problem
Existing vehicle handrail assemblies occupy valuable passenger standing space when not in use, reducing the utilization rate of space within the vehicle.
Innovation Solution
A vehicle handrail assembly with a rotating handrail that can switch between a use state and a retracted state, featuring a mounting base, a fixing rod, and a movable rod, allowing the handrail to adjust its length and position to optimize space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the handrail assembly is fixed in the use state, then passengers have a gripping position available, but the handrail assembly occupies the standing space of passengers, reducing space utilization
Solution Approach 1:
The handrail assembly is designed to be rotatable around a rotating axis, allowing it to dynamically change its position between a use state (extending in the first direction for gripping) and a retracted state (extending in the second direction to clear standing space). This dynamic repositioning resolves the contradiction by making the handrail's spatial occupation variable rather than fixed.
Solution Approach 2:
The handrail assembly utilizes a second direction (perpendicular to the first direction) for retraction, effectively moving the handrail out of the primary standing space dimension. By rotating the handrail from the first direction to the second direction, the assembly clears the vertical standing space while maintaining its structural presence, thus resolving the spatial conflict.
2Ease of operation
If the handrail assembly is fixed in the use state, then passengers have a gripping position available, but the space utilization rate within the vehicle is reduced
Solution Approach 1:
The rotatable handrail assembly allows the vehicle to optimize space utilization dynamically. When the handrail is rotated to the retracted state (extending in the second direction), it clears the standing space, thereby increasing the effective space utilization rate for passenger movement and boarding/alighting operations.
Solution Approach 2:
The handrail assembly alternates between use state and retracted state based on operational needs - extended during passenger boarding/alighting or when gripping is needed, and retracted during normal passenger movement or when space optimization is required. This periodic positioning maximizes space utilization across different operational phases.
3Area of stationary object
If the handrail assembly is made rotatable to avoid occupying standing space, then space utilization is improved, but the device complexity increases
Solution Approach 1:
The handrail assembly is segmented into a handrail portion and a mounting base with distinct functional zones. The rotating connection is localized to the interface between these segments, allowing the rotation mechanism to be integrated at a specific point rather than distributed throughout the entire structure, thus minimizing the added complexity.
Solution Approach 2:
The rotating handrail assembly is designed to nest within or near the mounting base structure when in the retracted state. The handrail portion can be positioned close to or within the spatial envelope of the mounting base, reducing the overall space requirement and simplifying the structural arrangement compared to a fully extended fixed design.
Data Source
AI summary
A vehicle handrail assembly includes: a mounting base and a rotating handrail. The rotating handrail includes a fixing rod and a movable rod. The fixing rod is rotatably connected to the mounting base along a first rotating axis extending in a first direction of a vehicle and a second rotating axis extending in a second direction of the vehicle, where the first direction is perpendicular to the second direction. The movable rod is movably connected to the fixing rod along the length direction of the rotating handrail. The rotating handrail switches between a use state and a retracted state. In the use state, the rotating handrail extends along the first direction, and in the retracted state, the rotating handrail extends along the second direction.