Vibration Decoupling Swing Arm for Motorized Two-Wheelers
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Solution Overview
Problem
Existing vibration decoupling arrangements for motorized two-wheeled vehicles, particularly scooters, face challenges in effectively reducing vibrations without compromising driving behavior, pitch compensation, and are often structurally complex and costly.
Innovation Solution
A vibration decoupling arrangement using a single swing arm with a support rod equipped with damping buffers, positioned below the cylinder, effectively decouples vibrations in the longitudinal direction of the vehicle, utilizing a balancer shaft for first-order vibrations and optimizing pitch compensation by orienting the decoupling rocker perpendicular to the cylinder axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional suspension with spring strut and elastic bushings is used, then vibration decoupling is achieved, but structural complexity and cost increase
Solution Approach 1:
The invention extracts the vibration decoupling function from the conventional complex suspension system (spring strut with elastic bushings) and implements it through a simplified swing arm mechanism with damping buffers, retaining only the essential vibration reduction capability while removing unnecessary structural complexity
Solution Approach 2:
The invention changes the vibration decoupling approach from using elastic materials (bushings) to using controlled mechanical damping through buffers, altering the fundamental parameter of how vibration energy is absorbed and dissipated in the system
2Object-affected harmful factors
If double swing arm configuration is used, then vibration decoupling is improved, but device complexity increases
Solution Approach 1:
The invention extracts the essential vibration decoupling function from the double swing arm configuration and implements it through a single swing arm with optimized damping buffers, removing the redundant second swing arm while preserving the core vibration reduction capability
Solution Approach 2:
The invention merges the vibration decoupling functions of both swing arms into a single integrated swing arm structure with damping buffers, combining multiple vibration reduction mechanisms into one unified component that achieves similar performance with reduced complexity
3Object-affected harmful factors
If elastic bushings are used without constraints, then vibration decoupling is achieved, but control over elasticity and movement direction is lost
Solution Approach 1:
The invention changes from uncontrolled elastic deformation in bushings to controlled mechanical damping through buffers with defined movement constraints, transforming the vibration decoupling mechanism from passive elasticity to active constrained damping
Solution Approach 2:
The damping buffers act as intermediaries between the swing arm and frame, providing controlled vibration decoupling with constrained movement directions, mediating the interaction between the powertrain and vehicle chassis while maintaining controll
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 solution provides effective vibration decoupling with reduced structural complexity and cost, improving driving behavior by minimizing pitch compensation and enhancing comfort, while efficiently damping vibrations in the direction of piston movement.
Implementation Method 1
damping buffers (14a, 14b) is provided on the powertrain swing arm (10)
Data Source
Figure 1
Figure 2~3
AI summary
According to the invention, an arrangement for the vibration decoupling of a motor for motorized two-wheelers is provided with only one engine-mount swing arm, which swing arm is mounted to be rotatable about a first shaft, wherein the first shaft is mounted on the vehicle frame of the two-wheeler such as to be rotatable about a second shaft by way of a decoupling swing arm, and wherein further a support rod fitted with damping buffers is provided on the engine-mount swing arm, the orientation of the support rod being chosen such that vibrations are decoupled in and against the direction of travel, that vibrations are decoupled in the direction of the cylinder axis and that a good anti-squat is obtained.