Adjustable Bicycle Brake Lever Linkage
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Solution Overview
Problem
Existing lever-link type bicycle brakes are not easily or quickly adjustable, limiting their adaptability to different wheel sizes and braking systems.
Innovation Solution
The design incorporates a quick release cam link and an adjustable lever pivot, allowing for adjustable coupling between brake arms and levers, enabling easy adjustment of the brake's leverage ratio and pad-to-rim gap for compatibility with various wheel widths and braking systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed lever-link mechanism is used, then the brake structure is simple, but the adaptability to different wheel sizes and braking systems is poor
Solution Approach 1:
The patent applies the dynamics principle by making the lever-link mechanism adjustable rather than fixed. The pivot point of the lever can be repositioned along the link, allowing the mechanical advantage ratio to be dynamically changed. This enables the same brake structure to adapt to different wheel sizes and braking systems by simply adjusting the pivot position, without requiring multiple different brake designs.
2Ease of operation
If a fixed lever-link mechanism is used, then the manufacturing is simple, but the ease of adjustment is poor
Solution Approach 1:
The patent applies segmentation by dividing the link into multiple adjustment positions with distinct pivot points. This allows the lever's pivot to be easily repositioned between predetermined locations, making adjustment simple and quick. The segmented design provides clear, discrete adjustment options that are easy to implement and change without requiring complex continuous adjustment mechanisms.
Data Source
AI summary
A brake apparatus including a bicycle structure, a first arm pivotably coupled to the bicycle structure, and a second arm pivotably coupled to the bicycle structure. A first lever can be pivotably coupled to the first arm. A quick release cam link can be pivotably coupled to the second arm. A second lever can be pivotably coupled to the first lever and pivotably coupled to the quick release cam link.