Configurable Idler Layout for 6-Bar Suspension Anti-Squat Control
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Solution Overview
Problem
Existing vehicle suspension systems for two-wheel vehicles do not effectively manage the interaction between the suspension linkage, damper, and the driven wheel, leading to suboptimal dynamic response and mechanical advantage during acceleration and deceleration.
Innovation Solution
A two-wheel vehicle suspension linkage system featuring a configuration with a suspended body, link bodies, and an idler cog, where the idler is pivotally connected to the suspended body, and a damper unit is integrated to resist movement between these components, allowing for improved dynamic response and mechanical advantage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional suspension linkage is used, then the structure is simple, but the anti-squat and anti-rise characteristics are not effectively managed
Solution Approach 1:
The suspension linkage is divided into multiple link bodies (link body 1, link body 2, link body 3, link body 4, link body 5, link body 6) that are operatively coupled together, allowing independent optimization of each link's function to achieve both anti-squat and anti-rise characteristics
Solution Approach 2:
An idler cog is introduced as an intermediary element between the driving cog and driven cog. This idler cog manipulates the chain force vector angle and interacts with the instantaneous velocity centers to optimize the suspension's dynamic response and pedaling efficiency
2Productivity
If the suspension linkage is optimized for dynamic response, then pedaling efficiency improves, but the device complexity increases
Solution Approach 1:
The suspension linkage employs a dynamic 6-bar mechanism with movable link bodies that can adapt their configuration during operation. The link bodies are connected through joints that allow relative motion, enabling the system to dynamically optimize pedaling efficiency across different riding conditions
Solution Approach 2:
The idler cog serves as a dynamic intermediary that adjusts the chain force vector angle based on the instantaneous velocity centers' positions, thereby optimizing power transmission and pedaling efficiency without requiring a completely complex redesign of the entire drive train
Data Source
AI summary
An idler for a two-wheeled vehicle is disclosed. In one embodiment the idler includes a cog configured to rotate about an idler axis; a bearing received in the cog; an idler mount coupled to a suspended body of the two-wheeled vehicle, the idler mount including: a body, an aperture formed in the body, and a flange extending from the body around the aperture. The bearing is received on an outer surface of the flange, the idler axis and a link body pivot axis of a suspension of the two-wheeled vehicle are located within the aperture, and the idler axis and the link body pivot axis are separated from one another by an offset amount.