Displaceable Bash Guard With Spring for Impact Absorption
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Solution Overview
Problem
Existing bash guards for bicycles either deform excessively upon impact, risking damage to the rider and bicycle, or fail to absorb impact effectively, potentially displacing the bicycle and causing injury.
Innovation Solution
A guard assembly comprising a bracket, guard, and spring, designed to allow adjustable deformation and absorption of impacts, incorporating a resilient element and a less resilient element to optimize protection for the drive system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the bash guard is made too resilient to allow deformation, then impact absorption is improved, but the risk of damage to the rider and bicycle increases
Solution Approach 1:
The bash guard incorporates different material properties in different regions - a harder first portion for initial impact resistance and a softer second portion for energy absorption, creating localized quality variations that balance protection and deformation
2Object-affected harmful factors
If the bash guard lacks resilience to protect the drive system, then drive system protection is improved, but the bicycle may be displaced by lifting from the ground
Solution Approach 1:
The differential hardness distribution allows the first portion to provide structural support and protection while the second portion absorbs impact energy, preventing both drive system damage and bicycle displacement
3Ease of manufacture
If the bash guard is made thinner to reduce weight, then ease of manufacture is improved, but the risk of shattering on impact increases
Solution Approach 1:
The bash guard combines materials with different hardness levels in a composite structure, where the harder first portion provides strength and the softer second portion provides toughness, preventing shattering while maintaining manufacturability
4Object-affected harmful factors
If the bash guard is made thicker to increase protection, then drive system protection is improved, but the device complexity and weight increase
Solution Approach 1:
Rather than uniformly thickening the guard, the invention uses localized material property variations - a harder first portion and softer second portion - achieving enhanced protection without increasing overall complexity
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 assembly provides customizable impact absorption, minimizing damage to the drive assembly while maintaining bicycle stability and rider safety.
Implementation Method 1
The spring may be formed from a resilient material... configured to fit against the guard... configured to contact the engagement surface... The relative position of the guard and the bracket may define a deformation of the spring from the rest configuration
Data Source
AI summary
A guard assembly for a chain and chain ring includes a bracket and a guard. The bracket and the guard are configured to move relative to one another. The movement is governed by a resilient spring placed to absorb and release impact energy imparted to the guard.