Compact Magnetorheological Damper Layout for Adjustable Bicycle Damping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Adjusting damping and spring characteristics in shock absorbers for bicycles is complex, especially for beginners, leading to suboptimal riding characteristics in extreme terrain.
Innovation Solution
A magneto rheological damper with a compact design, reduced length, and easy assembly, featuring a magnetic field generator near the end cap to change fluid viscosity, a coil spring for weight support, and a compensation chamber for improved damping, allowing for easier maintenance and reduced manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the magnetic field generator is positioned in the compression chamber near the end cap, then the damper length is shortened and the design becomes more compact, but the assembly complexity may increase
Solution Approach 1:
The magnetic field generator is merged with the end cap structure, where the end cap serves as both a closure component and a mounting structure for the magnetic field generator. This integration reduces the number of separate parts and simplifies assembly while achieving the compact design goal.
Solution Approach 2:
The magnetic field generator is positioned radially within the compression chamber rather than extending axially, utilizing radial space instead of axial space. This dimensional reorganization shortens the damper length while maintaining functional effectiveness.
2Ease of manufacture
If the damper design is simplified for easier assembly, then manufacturing cost is reduced, but the adjustability of damping characteristics may be limited
Solution Approach 1:
The damper incorporates a magnetic field generator that enables dynamic adjustment of damping characteristics through magnetic field control of the working fluid viscosity. This allows the system to adapt to different riding conditions while maintaining a relatively simple mechanical structure for ease of assembly.
Solution Approach 2:
The damping characteristics are adjusted by changing the viscosity parameter of the working fluid through magnetic field application. This parameter change approach allows for versatile damping adjustment without requiring complex mechanical adjustment mechanisms, thus maintaining ease of manufacture.
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
The solution provides enhanced shock absorption with adjustable damping and spring characteristics, improving riding performance and reducing the complexity and cost of the damper, making it suitable for smaller applications like mountain bikes and electric scooters.
Implementation Method 1
A magnetic field generator is located in the compression chamber and in an abutment relationship with the end cap for generating a magnetic field to change the viscosity of the working fluid
Data Source
AI summary
A magneto rheological damper includes a housing extending between a first opened end and a second opened end and defining a fluid chamber extending therebetween. An end cap is located at the first opened end and coupled to the housing. A piston is disposed in the fluid chamber dividing the fluid chamber into a compression chamber and a rebound chamber. A piston rod extends along the center axis and attaches to the piston for movement with the piston between a compression and a rebound stroke. A magnetic field generator is located in the compression chamber and in an abutment relationship with the end cap. An extension portion protrudes radially outwardly from the housing and defining a compensation chamber and a channel. The channel is in fluid communication with the compression chamber and the compensation chamber for allowing the working fluid to flow from the compression chamber to the compensation chamber.