Saddle-Type Vehicle Frame Pivot Shaft Hanger
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Solution Overview
Problem
Conventional saddle-type vehicle designs prioritize rigidity over flexibility, which can compromise vehicle control performance, especially on dirt roads or mixed surfaces, as they struggle to efficiently transmit external forces like chain reaction and road surface reactions to the vehicle body frame.
Innovation Solution
A saddle-type vehicle design featuring a vehicle body frame with pivot plates, swing arms, and a hanger member that connects the pivot shaft to a cross frame, allowing for enhanced flexibility and dispersion of forces, ensuring adequate rigidity and improved vehicle control performance by distributing external forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the engine is tightly fixed to the cross pipe to ensure rigidity, then the rigidity against chain reaction force and road surface reaction force is improved, but the flexibility of the vehicle body frame is worsened, compromising vehicle control performance
Solution Approach 1:
The patent divides the engine support structure into separate components: the engine is supported by the pivot shaft rather than being directly fixed to the cross pipe. This segmentation allows the engine to be supported independently, providing both rigidity for force transmission and flexibility for vehicle control, resolving the contradiction between strength and adaptability.
2Adaptability or versatility
If the rigidity of the vehicle body frame is lowered to improve vehicle control performance, then the flexibility is improved, but the rigidity against chain reaction force and road surface reaction force is worsened
Solution Approach 1:
The pivot shaft acts as an intermediary component between the engine and the vehicle body frame. It provides a flexible connection that allows the engine to move independently while still transmitting forces effectively. This intermediary structure enables the vehicle body frame to maintain adequate rigidity for force transmission while achieving the flexibility needed for improved vehicle control performance.
3Adaptability or versatility
If the engine is supported by the pivot shaft through insertion into the bracket part, then the flexibility and force dispersion are improved, but the structural complexity is increased
Solution Approach 1:
The pivot shaft serves multiple functions simultaneously: it supports the engine, provides flexible connection, disperses forces, and maintains structural integrity. By making this single component multi-functional, the patent achieves improved flexibility and force dispersion without proportionally increasing structural complexity, as one component performs multiple roles rather than requiring additional separate elements.
Data Source
AI summary
In a saddle-type vehicle, an engine is supported by a pivot shaft through insertion of the pivot shaft into a bracket part provided at a rear part of the engine. A center lower cross frame is so provided as to span a space between parts in left and right pivot plates on the lower side relative to the pivot shaft. The pivot shaft and the center lower cross frame are connected by a hanger member.