Motorcycle Frame Vibration Control via Elastic Coupling
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Solution Overview
Problem
Conventional motorcycles face challenges in adjusting vibration characteristics to suit multiple running modes due to limitations in damping and rigidity adjustments, leading to suboptimal maneuverability and ride quality.
Innovation Solution
The implementation of a vibration insulating member between first and second members mounted on left and right frames of a motorcycle, allowing for elastic coupling and adjustable stiffness to regulate damping characteristics, thereby enhancing rigidity and vibration control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the spring constant of the vehicle body is varied to adjust rigidity, then maneuverability can be improved, but damping characteristics remain difficult to adjust
Solution Approach 1:
The vehicle body is divided into left and right frames that can be independently coupled through vibration insulating members. This segmentation allows separate adjustment of damping characteristics at different locations without affecting overall structural integrity, enabling independent optimization of maneuverability and damping for different running modes.
Solution Approach 2:
The patent uses vibration insulating members with variable stiffness parameters to adjust damping characteristics. By changing the physical parameters (stiffness, damping coefficient) of these insulating members, the system can adapt to different running modes while maintaining proper vehicle body rigidity and maneuverability.
2Object-affected harmful factors
If joint parts are provided only for left and right frames, then lateral vibrations are dispersed, but vibration characteristics suitable for multiple running modes cannot be obtained
Solution Approach 1:
The vibration insulating members are designed to serve multiple functions: they couple the left and right frames together, disperse lateral vibrations, and provide adjustable damping characteristics. This multi-functionality allows the same structural component to address multiple vibration issues across different running modes without requiring separate specialized parts.
3Stability of the object's composition
If elastic coupling is provided only for the central frame, then front-rear frame coupling is achieved, but vibration characteristics for multiple running modes remain difficult to obtain
Solution Approach 1:
The patent extends the elastic coupling concept from the central frame to both left and right frames, adding a lateral dimension to the coupling system. This dimensional expansion allows independent adjustment of damping characteristics in both longitudinal and lateral directions, enabling optimization for multiple running modes while maintaining proper frame coupling.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enables precise adjustment of vibration characteristics, improving maneuverability and ride quality by widening the range of adjustable vibration modes and suppressing unwanted vibrations like the weaving mode, while maintaining torsional rigidity.
Implementation Method 1
a vibration insulating member provided between the first member and the second member so as to elastically couple the first and second members to each other
Implementation Method 2
elastically couple the first and second members to each other
Data Source
AI summary
To obtain vibration characteristics suited to a plurality of operating modes. A first member is mounted on at least one of a left side frame of a vehicle and a right side frame of the vehicle. The first member extends towards the right frame or the left frame. A second member is mounted to at least one of the right side frame of the vehicle and a left side frame. The second member extends towards the left frame or the right frame. A vibration insulating member is provided between the first member and the second member and elastically couples the first and second members to each other.