Bicycle Seat Post Isolator with Elastomeric Vibration Damping
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Solution Overview
Problem
Bicycle seat posts are not effectively isolated from the frame, leading to discomfort due to the transmission of bumps and vibrations to the rider, as existing damping elements and elastomers fail to completely absorb jarring forces.
Innovation Solution
A bicycle seat post isolator assembly featuring an elongated inner tubular body with an outer elastomeric layer, positioned between the seat post and the frame, and a retaining structure that locks the elastomeric layer between the tubular body and the frame, ensuring the seat post is completely isolated from the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If damping elements or elastomers are distributed between the seat post and frame, then vibration absorption is improved, but connection rigidity deteriorates causing incomplete isolation
Solution Approach 1:
The isolator is divided into distinct segments: an inner rigid tubular body for structural support and an outer elastomeric layer for vibration absorption. This segmentation allows each component to perform its specialized function without compromising the other, achieving both connection rigidity and vibration isolation.
Solution Approach 2:
The elastomeric layer serves as an intermediary between the rigid tubular body and the bicycle frame. It mediates the interaction by absorbing vibrations while the rigid body maintains positional stability, preventing direct transmission of jarring forces to the seat post.
2Stability of the object's composition
If rigid clamping is used to secure the seat post, then connection stability is improved, but vibration isolation deteriorates
Solution Approach 1:
Different parts of the isolator have different mechanical properties: the inner tubular body provides rigid local support for stable positioning, while the outer elastomeric layer provides locally compliant characteristics for vibration absorption. This local differentiation resolves the contradiction between stability and isolation.
3Reliability
If complex retaining structures are used to secure the isolator, then locking reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The retaining structure merges the frame cap and locking ring into a single integrated component that performs both functions simultaneously. This combination simplifies manufacturing compared to separate parts while maintaining reliable retention through the integrated design.
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 effectively absorbs all vibrations, preventing them from being transmitted to the rider, providing improved comfort during long rides or rough terrain, while being simple to manufacture and install.
Implementation Method 1
The outer elastomeric layer/covering is positioned between the body and the bicycle frame... effectively absorbs all vibrations, preventing them from being transmitted to the rider
Implementation Method 2
an outer elastomeric layer/covering, inserted into the opening to receive a seat post coaxially therein
Data Source
AI summary
A bicycle seat post isolator assembly constructed to be fixedly engaged in a seat post receiving opening in a bicycle frame. A seat post gripper includes an elongated inner tubular body with an outer elastomeric layer/covering, inserted into the opening to receive a seat post coaxially therein. The layer/covering is positioned between the body and the bicycle frame. A retaining structure designed to be fixed adjacent an edge of the seat post receiving opening with a portion extending into the opening to only engage portions of the outer elastomeric layer/covering of the seat post gripper so as to lock the seat post gripper in the seat post receiving opening, whereby the layer/covering of the gripper is positioned between the body of the gripper with the seat post inserted coaxially into the gripper and the bicycle frame.