Multi-Piece Motorcycle Frame Assembly Using Threaded Fasteners
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Solution Overview
Problem
Existing motorcycle frames are typically one-piece, welded structures that require complete redesign for subtle changes, such as accommodating larger-width rear tires, limiting flexibility and increasing production costs.
Innovation Solution
A multi-piece motorcycle frame design featuring a first frame with a steering head and engine-transmission assembly, and a second frame portion that is fastened to the first frame using threaded fasteners and interlocking mounting and coupling portions, allowing for adjustable assembly and load transfer without altering the main frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a one-piece welded frame structure is used, then structural integrity and stability are improved, but adaptability to different tire sizes and configurations deteriorates
Solution Approach 1:
The frame is divided into multiple separate sections (first frame section, second frame section, third frame section) that are joined together using fasteners rather than welding. This segmentation allows individual sections to be modified or replaced to accommodate different tire sizes and configurations while maintaining the overall structural integrity of the frame assembly.
2Strength
If a one-piece welded frame structure is used, then structural strength is improved, but manufacturing flexibility and production cost efficiency deteriorate
Solution Approach 1:
The frame comprises multiple separable sections connected by fasteners, enabling independent manufacturing of each section. This allows for modular production where sections can be manufactured separately and assembled, improving manufacturing flexibility and reducing costs associated with complete frame redesigns.
Solution Approach 2:
The frame sections are designed with universal mounting portions and coupling portions that can accommodate various configurations. The first frame section includes mounting portions for different tire widths, and the sections can be reconfigured for different motorcycle applications, enhancing manufacturing versatility.
3Stability of the object's composition
If a one-piece welded frame structure is used, then structural stability is improved, but ease of modification for design changes deteriorates
Solution Approach 1:
The frame is segmented into multiple sections that can be independently modified. The second frame section can be replaced with an alternative second frame section having different characteristics, allowing design changes without affecting the overall structural stability provided by the first and third frame sections.
Solution Approach 2:
The frame assembly allows for dynamic reconfiguration through the use of removable fasteners and interchangeable sections. This enables the frame to adapt to different design requirements while maintaining structural stability through proper fastening and coupling mechanisms.
Data Source
AI summary
A motorcycle includes a first frame having a steering head and a first mount, an engine-transmission assembly coupled to the first frame, a steering assembly pivotably coupled to the steering head, a front wheel rotatably coupled to the steering assembly, a swing arm assembly pivotably coupled to the first frame, a rear wheel rotatably coupled to the swing arm assembly, a second frame having a second mount coupled to the first mount with a threaded fastener, and a suspension component having a first end coupled to the swing arm assembly and a second end coupled to the second frame. Forces exerted by the suspension component on the first frame are directed through the second frame and the second mount.