Adjustable Bottom Bracket Mechanism for Bicycle Geometry
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional bicycle bottom brackets have non-adjustable installation positions for the bottom bracket shaft, requiring multiple bicycles with different shaft levels to meet various riding requirements, leading to inefficiencies and space inefficiencies.
Innovation Solution
An adjustable bottom bracket mechanism with a bottom bracket, axial connection portion, and mounting portion that allows the bottom bracket shaft to be adjusted along the seat tube's lengthwise extension direction, enabling positioning in two distinct configurations to alter the stepping center of gravity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the bottom bracket shaft installation position is made non-adjustable, then the structure is simple, but multiple bicycles with different shaft levels are required to meet various riding requirements
Solution Approach 1:
The mounting portion is designed to be adjustable between a first position and a second position along the seat tube, allowing the bottom bracket shaft installation level to be dynamically changed according to different riding requirements, thus resolving the contradiction between structural simplicity and adaptability
Solution Approach 2:
The bottom bracket mechanism is designed to perform multiple functions by allowing the mounting portion to be positioned at different locations, enabling a single bicycle to accommodate various shaft levels and meet different riding conditions, eliminating the need for multiple specialized bicycles
2Adaptability or versatility
If multiple bicycles with different bottom bracket shaft levels are used to meet various riding requirements, then adaptability is improved, but space consumption and economic efficiency deteriorate
Solution Approach 1:
A single bottom bracket mechanism can be configured for different shaft levels by adjusting the mounting portion position, making one bicycle serve multiple purposes and reducing the need to store multiple bicycles with fixed configurations
Solution Approach 2:
The adjustable mounting portion allows the bicycle to be reconfigured for different riding requirements, enabling one bicycle to replace multiple fixed-configured bicycles and thereby reducing space consumption
Data Source
AI summary
An adjustable bottom bracket mechanism, comprising: a bottom bracket, an axial connection portion and a mounting portion. The bottom bracket includes at least one shaft through hole and is configured for connection of a seat tube. A lengthwise extension direction of the seat tube is defined as a first direction. The axial connection portion includes at least one axial through hole and axially corresponds to the at least one shaft through hole. The mounting portion is connected to the axial connection portion and adjustably fixedly connected to the bottom bracket in a first position or a second position. When the mounting portion is in either of the first and the second position, axes of the at least one shaft through hole and the at least one axial through hole are located on the first direction.