Middle Step Assembly for Three-Wheel Motorcycle
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Solution Overview
Problem
Three-wheel motorcycles present challenges for aging riders in terms of mounting and dismounting due to the need for substantial strength and balance, as two-wheeled motorcycles require full leg use to balance when motion stops, and existing solutions do not adequately address ease of access for trikes.
Innovation Solution
A middle step assembly with a flattened U-shaped sub-frame and pivotally mounted steps, easily installed between the driver's and passenger's boards, providing a stable and accessible step for mounting and dismounting, utilizing steel tubing and hinges for secure attachment to the trike's main-frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a three-wheel motorcycle is designed with three wheels for stability, then the motorcycle becomes easier to balance and more stable, but mounting and dismounting becomes more difficult due to increased width and lack of intermediate support
Solution Approach 1:
The invention divides the mounting aid into separate segments: a left board extending from the driver's board area and a right board extending from the passenger's board area, with optional intermediate steps. This segmentation provides multiple discrete support points that facilitate the mounting process while maintaining the overall trike structure for stability.
Solution Approach 2:
The invention extends support structures (boards and steps) laterally from the main frame in both left and right directions, creating a multi-dimensional support platform. This adds lateral support elements without altering the vertical three-wheel configuration, thus maintaining stability while improving mounting ease.
2Strength
If the motorcycle frame is designed for standard mounting points, then the structural integrity is maintained, but additional mounting aids require complex installation procedures
Solution Approach 1:
The boards and steps are designed to utilize existing universal mounting points on the trike frame (such as handlebar mounts, footrest mounts, and seat mounts). This multi-functional approach allows the same frame structure to serve both its original purpose and provide additional mounting support, simplifying installation while maintaining structural integrity.
Solution Approach 2:
The invention uses copies of existing mounting mechanisms by adapting standard handlebar mounts, footrest mounts, and seat mounts to also support the extended boards and steps. This copying of proven mounting solutions reduces installation complexity while preserving the frame's structural integrity.
Data Source
AI summary
A motorcycle including a main-frame, at least three-wheels mounted on the main-frame, and a driver's seat mounted on the main-frame. The motorcycle also includes a forward driver's board, a rearward passenger's board, and a step mounted on the main-frame between the forward driver's board and the rearward passenger's board A middle step assembly includes a flattened U-shaped sub-frame adapted to be connected to the motorcycle main-frame, and a pair of steps, each of which is mounted on a different sub-frame end.